CiA Draft Standard 412 
  CANopen 
Profiles for medical devices 
Part 6: Dose measurement system 
 
 
 
 
 
 
 
 
Version: 1.1 
27. August 2008 
 CAN in Automation (CiA) e. V. 
 
 
HISTORY 
Date 
2005-09-30 
2008-09-01 
 
 
 
 
 
 
 
 
 
 
 
Profiles for medical devices – Part 6: Dose measurement system 
Changes 
Publication of Version 1.0 as draft standard proposal 
Publication of Version 1.1 as draft standard 
- Editorial changes  
- Usage of device profile specific bit in object 1001h corrected 
 
 
 
 
 
 
 
 
 
 
 
General information on licensing and patents 
CAN in AUTOMATION (CiA) calls attention to the possibility that some of the elements of this 
CiA specification may be subject of patent rights. CiA shall not be responsible for identifying 
any or all such patent rights. 
Because  this  specification  is  licensed  free  of  charge,  there  is  no  warranty  for  this 
specification,  to  the  extent  permitted  by  applicable  law.  Except  when  otherwise  stated  in 
writing  the  copyright  holder  and/or  other  parties  provide  this  specification  “as  is”  without 
warranty  of  any  kind,  either  expressed  or  implied,  including,  but  not  limited  to,  the  implied 
warranties  of  merchantability  and  fitness  for  a  particular  purpose.  The  entire  risk  as  to  the 
correctness and completeness of the specification is with you. Should this specification prove 
failures, you assume the cost of all necessary servicing, repair or correction. 
© CiA 2008 
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or 
utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, 
without permission in writing from CiA at the address below. 
CAN in Automation e. V. 
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Email: headquarters@can-cia.org 
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 CiA 2008 – All rights reserved 
Profiles for medical devices – Part 6: Dose measurement system 
 
 
CONTENTS 
1  Scope ...............................................................................................................................8 
2  References .......................................................................................................................8 
3  Abbreviations and definitions ............................................................................................8 
3.1  Abbreviations...........................................................................................................8 
3.2  Definitions ...............................................................................................................8 
4  Physical layer specification ...............................................................................................8 
5  General information ..........................................................................................................8 
5.1 
Introduction .............................................................................................................8 
5.2  Conversion field value to process value ...................................................................9 
5.3  Object coherences................................................................................................. 10 
5.4  Distance description for entrance/skin dose and -dose rate measuring .................. 11 
6  Error handling ................................................................................................................. 11 
6.1  Emergency object usage........................................................................................ 11 
6.2  Error code definition .............................................................................................. 11 
7  Finite state automata ...................................................................................................... 12 
7.1 
Introduction ........................................................................................................... 12 
7.2  Dose measurement system FSA ............................................................................ 12 
7.2.1  State of the dose measurement system FSA.............................................. 12 
7.2.2  Events of the dose measurement system FSA ........................................... 13 
7.2.3  Transitions of the dose measurement system FSA..................................... 13 
8  Predefinitions.................................................................................................................. 13 
8.1  General ................................................................................................................. 13 
8.2  Pre-defined communication objects ....................................................................... 13 
8.2.1  Object 1001h: Error register ....................................................................... 13 
8.2.2  RPDO 1 ..................................................................................................... 13 
8.2.3  TPDO 1 ..................................................................................................... 15 
8.2.4  TPDO 2 ..................................................................................................... 17 
9  Detailed object definitions ............................................................................................... 20 
9.1  General object ....................................................................................................... 20 
9.1.1  Object 6000h: Controlword ......................................................................... 20 
9.1.2  Object 6001h: Statusword .......................................................................... 21 
9.1.3  6002h: DMS error register .......................................................................... 23 
9.1.4  6003h: Current process value..................................................................... 25 
9.1.5  6004h: Current PV decimal digits ............................................................... 26 
9.1.6  6005h: Negative process value indicator .................................................... 26 
9.1.7  6006h: Distance focal point metering chamber ........................................... 28 
9.1.8  6007h: MD metering chamber patient plane................................................ 28 
9.1.9  6008h: RD focal point patient plane............................................................ 29 
9.1.10  6009h: MD focal point patient plane ........................................................... 29 
9.1.11  600Ah: Irradiated area ............................................................................... 30 
9.2  Dose area product measurement ........................................................................... 30 
9.2.1  General information ................................................................................... 30 
9.2.2  6010h: DAP scaling 1 FV............................................................................ 31 
9.2.3  6011h: DAP scaling 1 PV ........................................................................... 31 
9.2.4  6012h: DAP scaling 2 FV............................................................................ 32 
 CiA 2008 – All rights reserved 
 
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Profiles for medical devices – Part 6: Dose measurement system 
9.2.5  6013h: DAP scaling 2 PV ........................................................................... 32 
9.2.6  6014h: DAP offset ...................................................................................... 32 
9.2.7  6015h: DAP autozero ................................................................................. 33 
9.2.8  6016h: DAP scaling factor .......................................................................... 34 
9.2.9  6017h: DAP scaling offset .......................................................................... 34 
9.3.10  6018h: DAP field value............................................................................... 35 
9.3.10  6019h: DAP process value ......................................................................... 35 
9.3.10  601Ah: DAP decimal digits PV ................................................................... 36 
9.2.10  601Bh: DAP calibration object .................................................................... 36 
9.2.11  601Ch: DAP physical unit FV ..................................................................... 37 
9.2.12  601Dh: DAP test value ............................................................................... 38 
9.2.13  601Eh: DAP delta value ............................................................................. 38 
9.3  Dose area product rate measurement .................................................................... 39 
9.3.1  General information ................................................................................... 39 
9.3.2  6020h: DAPR scaling 1 FV ......................................................................... 39 
9.3.3  6021h: DAPR scaling 1 PV ......................................................................... 39 
9.3.4  6022h: DAPR scaling 2 FV ......................................................................... 40 
9.3.5  6023h: DAPR scaling 2 PV ......................................................................... 40 
9.3.6  6024h: DAPR offset.................................................................................... 41 
9.3.7  6025h: DAPR autozero............................................................................... 41 
9.3.8  6026h: DAPR scaling factor........................................................................ 42 
9.3.9  6027h: DAPR scaling offset........................................................................ 43 
9.3.10  6028h: DAPR field value ............................................................................ 43 
9.3.11  6029h: DAPR process value....................................................................... 43 
9.3.12  602Ah: DAPR decimal digits PV ................................................................. 44 
9.3.13  602Bh: DAPR calibration object ................................................................. 45 
9.3.14  602Ch: DAPR physical unit FV ................................................................... 45 
9.3.15  602Dh: DAPR test value............................................................................. 46 
9.3.16  602Eh: DAPR delta value ........................................................................... 47 
9.4  Dose measurement................................................................................................ 47 
9.4.1  General information ................................................................................... 47 
9.4.2  6030h: Dose scaling 1 FV........................................................................... 47 
9.4.3  6031h: Dose scaling 1 PV .......................................................................... 48 
9.4.4  6032h: Dose scaling 2 FV........................................................................... 48 
9.4.5  6033h: Dose scaling 2 PV .......................................................................... 49 
9.4.6  6034h: Dose offset ..................................................................................... 49 
9.4.7  6035h: Dose autozero ................................................................................ 50 
9.4.8  6036h: Dose scaling factor ......................................................................... 51 
9.4.9  6037h: Dose scaling offset ......................................................................... 51 
9.4.10  6038h: Dose field value.............................................................................. 52 
9.4.11  6039h: Dose process value ........................................................................ 52 
9.4.12  603Ah: Dose decimal digits PV .................................................................. 53 
9.4.13  603Bh: Dose calibration object................................................................... 54 
9.4.14  603Ch: Dose physical unit FV .................................................................... 54 
9.4.15  603Dh: Dose test value .............................................................................. 55 
9.4.16  603Eh: Dose delta value ............................................................................ 55 
9.5  Dose rate measurement......................................................................................... 56 
9.5.1  General information ................................................................................... 56 
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 CiA 2008 – All rights reserved 
 
 
Profiles for medical devices – Part 6: Dose measurement system 
9.5.2  6040h: Dose rate scaling 1 FV ................................................................... 56 
9.5.3  6041h: Dose rate scaling 1 PV ................................................................... 57 
9.5.4  6042h: Dose rate scaling 2 FV ................................................................... 57 
9.5.5  6043h: Dose rate scaling 2 PV ................................................................... 58 
9.5.6  6044h: Dose rate offset .............................................................................. 58 
9.5.7  6045h: Dose rate autozero ......................................................................... 59 
9.5.8  6046h: Dose rate scaling factor .................................................................. 59 
9.5.9  6047h: Dose rate scaling offset .................................................................. 60 
9.5.10  6048h: Dose rate field value....................................................................... 60 
9.5.11  6049h: Dose rate process value ................................................................. 61 
9.5.12  604Ah: Dose rate decimal digits PV ........................................................... 62 
9.5.13  604Bh: Dose rate calibration object............................................................ 62 
9.5.14  604Ch: Dose rate physical unit FV ............................................................. 63 
9.5.15  604Dh: Dose rate test value ....................................................................... 64 
9.5.16  604Eh: Dose rate delta value ..................................................................... 64 
9.6  RD entrance/skin dose measurement..................................................................... 65 
9.6.1  General information ................................................................................... 65 
9.6.2  6050h: RD entrance/skin dose scaling 1 FV ............................................... 65 
9.6.3  6051h: RD entrance/skin dose scaling 1 PV ............................................... 66 
9.6.4  6052h: RD entrance/skin dose scaling 2 FV ............................................... 66 
9.6.5  6053h: RD entrance/skin dose scaling 2 PV ............................................... 66 
9.6.6  6054h: RD entrance/skin dose offset .......................................................... 67 
9.6.7  6055h: RD entrance/skin dose autozero ..................................................... 67 
9.6.8  6056h: RD entrance/skin dose scaling factor .............................................. 68 
9.6.9  6057h: RD entrance/skin dose scaling offset .............................................. 69 
9.6.10  6058h: RD entrance/skin dose field value................................................... 69 
9.6.11  6059h: RD entrance/skin dose process value ............................................. 70 
9.6.12  605Ah: RD entrance/skin dose decimal digit PV ......................................... 70 
9.6.13  605Bh: RD entrance/skin dose calibration object........................................ 71 
9.6.14  605Ch: RD entrance/skin dose physical unit FV ......................................... 71 
9.6.15  605Dh: RD entrance/skin dose test value ................................................... 72 
9.6.16  605Eh: RD entrance/skin dose delta value ................................................. 73 
9.7  RD entrance/skin dose rate measurement.............................................................. 73 
9.7.1  General information ................................................................................... 73 
9.7.2  6060h: RD entrance/skin dose rate scaling 1 FV ........................................ 74 
9.7.3  6061h: RD entrance/skin dose rate scaling 1 PV ........................................ 74 
9.7.4  6062h: RD entrance/skin dose rate scaling 2 FV ........................................ 75 
9.7.5  6063h: RD entrance/skin dose rate scaling 2 PV ........................................ 75 
9.7.6  6064h: RD entrance/skin dose rate offset ................................................... 75 
9.7.7  6065h: RD entrance/skin dose rate autozero .............................................. 76 
9.7.8  6066h: RD entrance/skin dose rate scaling factor....................................... 77 
9.7.9  6067h: RD entrance/skin dose rate scaling offset ....................................... 77 
9.7.10  6068h: RD entrance/skin dose rate field value............................................ 78 
9.7.11  6069h: RD entrance/skin dose rate process value ...................................... 78 
9.7.12  606Ah: RD entrance/skin dose rate decimal digits PV ................................ 79 
9.7.13  606Bh: RD entrance/skin dose rate calibration object................................. 80 
9.7.14  606Ch: RD entrance/skin dose rate physical unit FV .................................. 80 
9.7.15  606Dh: RD entrance/skin dose rate test value............................................ 81 
 CiA 2008 – All rights reserved 
 
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Profiles for medical devices – Part 6: Dose measurement system 
9.8 
9.7.16  606Eh: RD entrance/skin dose rate delta value .......................................... 82 
Irradiation time measurement ................................................................................ 82 
9.8.1  General information ................................................................................... 82 
9.8.2  6070h: Irradiation time scaling 1 FV ........................................................... 82 
9.8.3  6071h: Irradiation time scaling 1 PV ........................................................... 83 
9.8.4  6072h: Irradiation time scaling 2 FV ........................................................... 83 
9.8.5  6073h: Irradiation time scaling 2 PV ........................................................... 84 
9.8.6  6074h: Irradiation time offset ...................................................................... 84 
9.8.7  6075h: Irradiation time autozero ................................................................. 85 
9.8.8  6076h: Irradiation time scaling factor.......................................................... 85 
9.8.9  6077h: Irradiation time scaling offset .......................................................... 86 
9.8.10  6078h: Irradiation time field value .............................................................. 86 
9.8.11  6079h: Irradiation time process value......................................................... 87 
9.8.12  607Ah: Irradiation time decimal digits PV ................................................... 88 
9.8.13  607Bh: Irradiation time calibration object.................................................... 88 
9.8.14  607Ch: Irradiation time physical unit FV ..................................................... 89 
9.8.15  607Dh: Irradiation time test value............................................................... 90 
9.8.16  607Eh: Irradiation time delta value ............................................................. 90 
9.9  Chamber temperature measurement ...................................................................... 91 
9.9.1  General information ................................................................................... 91 
9.9.2  6080h: Chamber temperature scaling 1 FV................................................. 91 
9.9.3  6081h: Chamber temperature scaling 1 PV................................................. 91 
9.9.4  6082h: Chamber temperature scaling 2 FV................................................. 92 
9.9.5  6083h: Chamber temperature scaling 2 PV................................................. 92 
9.9.6  6084h: Chamber temperature offset ........................................................... 93 
9.9.7  6085h: Chamber temperature autozero ...................................................... 93 
9.9.8  6086h: Chamber temperature scaling factor ............................................... 94 
9.9.9  6087h: Chamber temperature scaling offset ............................................... 95 
9.9.10  6088h: Chamber temperature field value .................................................... 95 
9.9.11  6089h: Chamber temperature process value .............................................. 95 
9.9.12  608Ah: Chamber temperature decimal digits PV......................................... 96 
9.9.13  608Bh: Chamber temperature calibration object ......................................... 97 
9.9.14  608Ch: Chamber temperature physical unit FV........................................... 97 
9.9.15  608Dh: Chamber temperature test value .................................................... 98 
9.9.16  608Eh: Chamber temperature delta value................................................... 99 
9.10  Air pressure measurement .................................................................................... 99 
9.10.1  General information ................................................................................... 99 
9.10.2  6090h: Air pressure scaling 1 FV................................................................ 99 
9.10.3  6091h: Air pressure scaling 1 PV ............................................................. 100 
9.10.4  6092h: Air pressure scaling 2 FV.............................................................. 100 
9.10.5  6093h: Air pressure scaling 2 PV ............................................................. 101 
9.10.6  6094h: Air pressure offset ........................................................................ 101 
9.10.7  6095h: Air pressure autozero ................................................................... 102 
9.10.8  6096h: Air pressure scaling factor ............................................................ 103 
9.10.9  6097h: Air pressure scaling offset ............................................................ 103 
9.10.10 6098h: Air pressure field value ................................................................. 103 
9.10.11 6099h: Air pressure process value ........................................................... 104 
9.10.12 609Ah: Air pressure decimal digits PV...................................................... 105 
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 CiA 2008 – All rights reserved 
Profiles for medical devices – Part 6: Dose measurement system 
9.10.13 609Bh: Air pressure calibration object ...................................................... 105 
9.10.14 609Ch: Air pressure physical unit FV........................................................ 106 
9.10.15 609Dh: Air pressure test value ................................................................. 107 
9.10.16 609Eh: Air pressure delta value ............................................................... 107 
9.11  MD entrance/skin dose measurement.................................................................. 108 
9.11.1  General information ................................................................................. 108 
9.11.2  60A0h: MD entrance/skin dose scaling 1 FV............................................. 108 
9.11.3  60A1h: MD entrance/skin dose scaling 1 PV ............................................ 109 
9.11.4  60A2h: MD entrance/skin dose scaling 2 FV............................................. 109 
9.11.5  60A3h: MD entrance/skin dose scaling 2 PV ............................................ 109 
9.11.6  60A4h: MD entrance/skin dose offset ....................................................... 110 
9.11.7  60A5h: MD entrance/skin dose autozero .................................................. 110 
9.11.8  60A6h: MD entrance/skin dose scaling factor ........................................... 111 
9.11.9  60A7h: MD entrance/skin dose scaling offset ........................................... 111 
9.11.10 60A8h: MD entrance/skin dose field value ................................................ 112 
9.11.11 60A9h: MD entrance/skin dose process value .......................................... 112 
9.11.12 60AAh: MD entrance/skin dose decimal digit PV ...................................... 113 
9.11.13 60ABh: MD entrance/skin dose calibration object ..................................... 114 
9.11.14 60ACh: MD entrance/skin dose physical unit FV....................................... 114 
9.11.15 60ADh: MD entrance/skin dose test value ................................................ 115 
9.11.16 60AEh: MD entrance/skin dose delta value .............................................. 116 
9.12  MD entrance/skin dose rate measurement........................................................... 116 
9.12.1  General information ................................................................................. 116 
9.12.2  60B0h: MD entrance/skin dose rate scaling 1 FV...................................... 117 
9.12.3  60B1h: MD entrance/skin dose rate scaling 1 PV ..................................... 117 
9.12.4  60B2h: MD entrance/skin dose rate scaling 2 FV...................................... 118 
9.12.5  60B3h: MD entrance/skin dose rate scaling 2 PV ..................................... 118 
9.12.6  60B4h: MD entrance/skin dose rate offset ................................................ 118 
9.12.7  60B5h: MD entrance/skin dose rate autozero ........................................... 119 
9.12.8  60B6h: MD entrance/skin dose rate scaling factor .................................... 120 
9.12.9  60B7h: MD entrance/skin dose rate scaling offset .................................... 120 
9.12.10 60B8h: MD entrance/skin dose rate field value......................................... 121 
9.12.11 60B9h: MD entrance/skin dose rate process value ................................... 121 
9.12.12 60BAh: MD entrance/skin dose rate decimal digits PV.............................. 122 
9.12.13 60BBh: MD entrance/skin dose rate calibration object .............................. 123 
9.12.14 60BCh: MD entrance/skin dose rate physical unit FV................................ 123 
9.12.15 60BDh: MD entrance/skin dose rate test value ......................................... 124 
9.12.16 60BEh: MD entrance/skin dose rate delta value ....................................... 125 
 
 
 
 
 CiA 2008 – All rights reserved 
 
7 
Profiles for medical devices – Part 6: Dose measurement system 
 
 
1  Scope 
This specification defines the CANopen device profile for dose measurement systems. 
A  prerequisite  for  the  conformity  to  this  CANopen  device  profile  is  conformity  with  the 
CANopen  communication  profile.  Additionally,  in  the  case  that  the  module  is  programmable 
conformance  to  the  framework  for  programmable  CANopen  devices  is  required.  It  is 
recommended to consulted these specifications in parallel to this device profile specification.  
2  References 
/CiA301/ 
/CiA303-2/ 
/CiA404/ 
/CiA412-1/ 
CiA 301, CANopen application layer and communication profile 
CiA 303, CANopen additional specifications – Part 2: Representation of SI unit 
and prefix 
CiA 404, CANopen profile for measuring devices and closed-loop controllers 
CiA 412, CANopen profiles for medical devices – Part 1: General definitions 
3  Abbreviations and definitions 
Finite state automata 
Field value 
Focal point 
Irradiation time 
3.1  Abbreviations 
DAP  Dose area product 
DAPR  Dose area product rate 
DMS  Dose measurement system 
FSA 
FV  
FP  
IT   
MC   Metering chamber 
MD   Measured distance 
PV  
PP  
RD  
Process value 
Patient plane 
Reference distance 
The abbreviations given in /CiA412-1/ apply for this document as well. 
3.2  Definitions 
The definitions given in /CiA412-1/ apply for this document as well. 
4  Physical layer specification 
The definitions given in /CiA301/ and /CiA412-1/ apply for this document as well. 
5  General information 
5.1 
Introduction 
The CANopen dose measurement system measures the x-ray dose and dose area product. In 
addition to that, the following values are measured: 
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 CiA 2008 – All rights reserved