OLCT200 HART Specification_rev 02.1_EN (77036008)
Contents
1. Field Device Specification Oldham OLCT 200 Revision 1 Initial release 13 April 2011 Current release 13 April 2011 Part Number 77036008 Revision 02 1 HART is a registered trademark of the HART Communication Foundation This page left intentionally blank Revision 1 0 Release Date April 13 2011 Page 2 of 20 TABLE OF CONTENTS 2 tte SP NT 5 5 120 v A 5 13 Who should use this 5 1 4 Abbreviations and definitions 5 159 Gee edt 5 222 EE E 6 3y AO 6 A gt 6 l Process 6 Aled Sensor Input Channels 6 6 4 2 1 Analog Output 1 Gas 02 20 6 4 3 Local Inter2. Write Engineering 7106 14 10 9 Command 142 Write Unit 6 14 10 10 Command 143 Write Enumerated 15 10 11 Command 144 Write Read 16 10 12 Command 150 Reset Communications 51 16 Wl BE N OANA 17 125 17 12 1 Sampling 17 12 2 LORE B E So arenas ewes wast E E ous ead AE tees 17 12 3 Reset merena an aa 17 12 4 17 12 5 Command Response 17 12 6 Busy and Delayed Response 18 12 7 LONG MESSAGES sx 18 12 8 Non Volatile Memory elas 18 12 9 18 0 Write Protects ai eee 18 IUE a a aE 18 lt lt 19 Revision 1 0 Release Date April 13 2011 Page 4 of 20 1 INTRODUCTION 1 1 Scope Oldham S A S gas detection transmitter model OLCT 2
3. 8 Real Variable Index Command Specific Response Codes No Command Specific Errors 5 Miscellaneous Error Too Few Data Bytes 15 Data Entry Error Invalid Index 10 12 Command 150 Reset Communications Lost Resets the Communications Lost Status Bit Request Data Bytes Response Data Bytes None Command Specific Response Codes No Command Specific Errors Revision 1 0 Release Date April 13 2011 Page 16 of 20 11 TABLES No applicable tables 12 PERFORMANCE 12 1 Sampling Rates The table shows the HART interface board update rates Dynamic Variable Sample Rate Measured Variable 1 per second Analog Output 1 per second 12 2 Power Up At power up the device goes through an initialization process that takes several seconds Communications between the HART interface and the sensor begins about 20 seconds after power up but the sensor may take longer to initialize the dynamic variables values 12 3 Reset Command 42 Device Reset is not supported in the HART Interface 12 4 Self Test Command 41 Self Test is not supported in the HART Interface 12 5 Command Response Times Minimum 10 ms Typical 25 ms Maximum 100 ms Revision 1 0 Release Date April 13 2011 Page 17 of 20 12 6 Busy Delayed Response No delayed response mechanism is supported 12 7 Long Messages The longest message response is 37 data bytes when the master requests four slot vari
4. for connection details This is the only output from this transmitter representing the process gas measurement linearized and scaled according to the configured range of the instrument This output corresponds to the Primary Variable HART Communication is supported on this loop This device has a CN number of 1 A guaranteed linear over range is provided Device malfunction can be indicated by down scale or up scale current When a device malfunction occurs the loop current is set to ImA The direction is selectable by the user see Section 4 3 below Current values are shown in the table below Revision 1 0 Release Date April 13 2011 Page 6 of 20 Direction Values percent of Values mA or V range Linear over range Down 6 25 1 0 3 0mA 0 1mA Up 5 0 1 0 20 8mA 0 1mA Device malfunction Down less than 19 1 0mA eiceta Up greater than N A N A Maximum current 112 5 22 0mA Multi Drop current draw 4 0mA Lift off voltage 10 5 V 4 3 Local Interfaces Jumpers and Switches 4 3 1 Local Controls And Displays The OLCT 200 has an onboard LCD screen that display gas readings as well as the devices configuration menu screens The device is operated non intrusively using a magnetic wand to activate the devices control buttons Calibration of the device is also performed in this manner 4 3 2 Internal Jumpers And Switches None 5 DEVICE VARIABLES This Field Device does not expose an
5. 00 revision 1 complies with HART Protocol Revision 7 2 This document specifies all the device specific features and documents HART Protocol implementation details e g the Engineering Unit Codes supported The functionality of this Field Device is described sufficiently to allow its proper application in a process and its complete support in HART capable Host Applications 1 2 Purpose This specification is designed to compliment other documentation e g the OLCT 200 User Manual by providing a complete unambiguous description of this Field Device from a HART Communication perspective 1 3 Who should use this document This specification is designed to be a technical reference for HART capable Host Application Developers System Integrators and knowledgeable End Users It also provides functional specifications e g commands enumerations and performance requirements used during Field Device development maintenance and testing This document assumes the reader is familiar with HART Protocol requirements and terminology 1 4 Abbreviations and definitions ADC Analog to Digital Converter CPU Central Processing Unit of microprocessor DAC Digital to Analog Converter EEPROM Electrically Erasable Read Only Memory 1 5 References HART Field Communication Protocol Specification HCF_SPEC 13 Available from the HCF OLCT 200 User Installation Manual Document IMAN123 2003 Available from the Oldham 5 5 Revision 1 0 Release
6. Alternative operating modes No Burst mode No Write protection No Revision 1 0 Release Date April 13 2011 Page 19 of 20 OLDHAM The Fixed Gas Detection Experts EUROPEAN PLANT AND OFFICES 2 1 Est rue Orfila CS 20417 62027 Arras Cedex FRANCE T l 33 0 3 21 60 80 80 Fax 33 0 3 21 60 80 00 Website http www oldhamgas com AMERICAS ASIA PACIFIC EUROPE Tel 1 713 559 9280 Tel 86 21 3127 6373 Tel 33 321 608 080 Fax 1 281 292 2860 Fax 86 21 3127 6365 Fax 33 321 608 000 americas oldhamgas com sales oldhamgas com info oldhamgas com
7. Bytes 15 Data Entry Error Invalid Index Revision 1 0 Release Date April 13 2011 Page 13 of 20 10 8 Command 141 Write Engineering Units Writes the string value of the engineering units Request Data Bytes 0 9 Latin 1 ASCII Engineering Units Response Data Bytes 09 Latin 1 ASCII Engineering Units Command Specific Response Codes 0 Success No Command Specific Errors 5 Miscellaneous Error Too Few Data Bytes 10 9 Command 142 Write Unit Identifier Writes the string for the unit identifier Request Data Bytes Latin 1 ASCII Unit Identifier Response Data Bytes Latin 1 ASCII Unit Identifier Command Specific Response Codes 0 Success No Command Specific Errors 5 Miscellaneous Error Too Few Data Bytes Revision 1 0 Release Date April 13 2011 Page 14 of 20 10 10 Command 143 Write Enumerated Variables Writes the value of the enumerated variable associated with the index Request Data Bytes Unsigned 8 Enumerated Variable Index Response Data Bytes Unsigned 8 Enumerated Variable Index Command Specific Response Codes 5 Miscellaneous Error Too Few Data Bytes 15 Data Entry Error Invalid Index Revision 1 0 Release Date April 13 2011 Page 15 of 20 10 11 Command 144 Write Read Variables Writes the value of the real variable associated with the index Request Data Bytes Unsigned 8 Real Variable Index Ex Response Data Bytes Unsigned
8. Date April 13 2011 Page 5 of 20 2 DEVICE IDENTIFICATION Manufacturer Name Manufacture ID Code HART Protocol Revision Number of Device Variables Physical Layers Supported Physical Device Category Oldham S A S 604D Model Name s Device Type Code OLCT 200 E198 Hex 7 2 1 Device Revision FSK Transmitter Non DC isolated Bus Device The product s nameplate including serial number can be seen on the metal tag on the top of the unit 3 PRODUCT OVERVIEW The OLCT 200 is a fixed placement gas detection transmitter intended to monitor for hazardous levels of toxic gases oxygen and combustible gases The transmitter is housed in an explosion proof enclosure and product features a LCD screen to display gas readings and provide access to the transmitter s menu functions The device provides both analog 4 20mA and digital ModBus RTU communication and is externally powered 10 30VDC 4 PRODUCT INTERFACES 4 1 Process Interface 4 1 1 Sensor Input Channels Smart gas sensors connect to the transmitter device via standard ten pin connectors Refer to the Installation Manual for installation details Operating ranges correspond to the capabilities of each sensor type 4 2 Host interface 4 2 1 Analog Output 1 Gas Concentration The two wire 4 to 20mA current loop is connected on two terminals marked and on the HART Modem board P N 10 0351 Refer to the Installation Manual
9. S 9 1 Supported Commands The following common practice commands are implemented 38 Reset Configuration Changed Flag 40 Enter Exit Fixed Current Mode 45 Trim DAC Zero 46 Trim DAC Gain 48 Read Additional Device Status 9 2 Burst Mode This Field Device does not support Burst Mode 9 3 Catch Device Variable This Field Device does not support Catch Device Variable Revision 1 0 Release Date April 13 2011 Page 9 of 20 10 DEVICE SPECIFIC COMMANDS The following device specific commands are implemented 128 Read Firmware 129 Read Active Channel 130 Read Sensor Life 131 Read Engineering Units 132 Read Unit Identifier 133 Read Enumerated Variables 134 Read Real Variables 141 Write Engineering Units 142 Write Unit Identifier 143 Write Enumerated Variables 144 Write Real Variables 150 Reset Communications Lost 10 1 Command 128 Read Firmware Reads the firmware version in ASCII Request Data Bytes Response Data Bytes 0 3 Latin 1 ASCII Firmware Version Command Specific Response Codes 0 Success No Command Specific Errors Revision 1 0 Release Date April 13 2011 Page 10 of 20 10 2 Command 129 Read Active Channel Reads the active channel number Request Data Bytes Response Data Bytes Unsigned 8 Active Channel Command Specific Response Codes 0 Success No Command Specific Errors 10 3 Command 130 Read Sensor Life Reads the sensor life remaining Request Data Bytes Response Data B
10. ables in issuing Command 9 Read Device Variables and Status 12 8 Non Volatile Memory HART configuration data is written to the EEPROM on the HART interface board during processing of the HART command Sensor configuration data is written to the sensor through Modbus interface by the HART command Process parameters are stored in RAM each second and read back to the host on request 12 9 Modes Fixed current mode 15 attained through use of Command 40 Enter Exit Fixed Current Mode It is also attained through Command 6 Write Poll Address when the Loop Current Mode parameter is set to disabled 12 10 Write Protect No write protect is provided in the HART interface board 12 11 Damping No additional PV damping is provided beyond the sampling of the sensor value by the HART interface board once per second Revision 1 0 Release Date April 13 2011 Page 18 of 20 CAPABILITY CHECKLIST Manufacturer model and revision Oldham S A S OLCT 200 Rev 1 Device type Transmitter HART revision 7 2 Device Description available Yes Number and type of sensors 25 Sensors 4 types Number and type of actuators None Number and type of host side signals 1 4 20mA Analog Number of Device Variables 0 Number of Dynamic Variables 1 Mappable Dynamic Variables No Number of common practice commands 3 Number of device specific commands 12 Bits of additional device status 13
11. el 2 Alarm 1 Misc 4 4 Channel 2 Alarm 2 Misc 4 6 Channel 2 Fault Misc 4 1 0 Not Used Misc 4 1 Channel 1 Cal Misc 4 2 Channel 2 Cal Misc 4 2 3 Calibration Required Misc 4 4 DAC Span Not Calibrated Misc 4 5 DAC Zero Not Calibrated Misc 4 6 Unique Id not Set Misc 4 7 Communication Lost Misc 4 7 3 Byte 0x00 Misc 4 4 Byte 0x00 Misc 4 5 Byte 0x00 Misc 4 6 Byte 0x00 7 Byte 0x00 8 Byte 0x00 Revision 1 0 Release Date April 13 2011 Page 8 of 20 8 UNIVERSAL COMMANDS Command 3 returns loop current and PV for a total of 9 bytes Command 9 responds to host commands having up to and including four device variable codes If more than four device variable codes are received the response is truncated to the first four device variable codes and the response code 30 Command Response Truncated is returned Device variable 0 is the Primary variable so the response is identical to the Primary Variable information Command 14 returns unit code 240 and NAN value for the upper and lower sensor limits and for the minimum span since these variables are not defined The serial number is returned as 0 since it is not used Command 15 returns not used for the alarm code transfer function and private label distributor It returns 251 for the write protect code since it is not controlled by HART Communications There is no adjustable damping value to the value 0 is returned 9 COMMON PRACTICE COMMAND
12. faces Jumpers and Switches 7 4 3 1 Local Controls 5 2 7 4 352 Internal Jumpers And 4 cass 7 552 DEVICE V C I E E E ela oa hae 7 Dynamic cds sso otne a a Raat aie Sate adel apache 7 Ta Status a 8 WSViCE I La E EEEIEE EAT E EE E 8 T2 Extended DEVICE SS a 8 7 3 Additional Device Status Command 48 8 8 Universal Command Sissies e EE E EAE E E E 9 9 Common Practice Commands 9 Supported Commands EE 9 92 9 93 Catch Device 9 TOs Device Specific 10 10 1 Command 128 Read 2 4 000000 10 10 2 Command 129 Read Active 11 10 3 Command 130 Read Sensor 11 10 4 Command 131 Read Engineering 12 Revision 1 0 Release Date April 13 2011 Page 3 of 20 10 5 Command 132 Read Unit 12 10 6 Command 133 Read Enumerated 13 10 7 Command 134 Read Real 13 10 8 Command 141
13. y Device Variables 6 DYNAMIC VARIABLES One dynamic variable is supported Revision 1 0 Release Date April 13 2011 Page 7 of 20 7 STATUS INFORMATION 7 1 Device Status Bit 0 PV out of limits is not used Bit 1 Non PV out of limits is not used Bit 2 Analog Output Saturated is set when the loop output current is below 3 0mA above 20 8mA Bit 3 PV Analog Output Fixed is set when the loop current mode is disabled Bit 4 More Status Available is set whenever any failure is detected Command 48 gives details See Section 7 3 Bit 5 Cold Start is set after a power cycle and reset for each type of Master separately Bit 6 Configuration Changed is set when a HART command modifies the transmitter configuration Each Master will reset this bit separately by use of Command 38 Bit 7 Device Malfunction is set if the Modbus interface between sensor and HART board malfunctions by a communications failure It is reset when Modbus communications is re established 7 2 Extended Device Status The Field Device cannot predict in advance when the maintenance will be required 7 3 Additional Device Status Command 48 Command 48 returns 9 bytes of data with the following status information Byte Bit Meaning Class Device Status Bits Set 0 0 Channel 1 Alarm 1 Misc 4 1 Channel 1 Alarm 2 Misc 4 2 Channel 1 Fault Misc 4 3 Chann
14. ytes 0 1 Unsigned 16 Sensor Life Command Specific Response Codes 0 Success No Command Specific Errors Revision 1 0 Release Date April 13 2011 Page 11 of 20 10 4 Command 131 Read Engineering Units Reads the string value of the engineering units name in ASCII Request Data Bytes Response Data Bytes Latin 1 ASCII Engineering Units Command Specific Response Codes 0 Success No Command Specific Errors 10 5 Command 132 Read Unit Identifier Reads the string value of the unit identifier name Request Data Bytes Response Data Bytes 0 15 Latin 1 ASCII Unit Identifier Command Specific Response Codes No Command Specific Errors Revision 1 0 Release Date April 13 2011 Page 12 of 20 10 6 Command 133 Read Enumerated Variables Reads the enumerated variable associated with the index value Request Data Bytes Unsigned 8 Enumerated Variable Index Response Data Bytes 0 Unsigned 8 Enumerated Variables Index Command Specific Response Codes o Succes NoCommand Spefie Eos Miscellaneous Error Too Few Data Bytes Data Entry Error Invalid Index 10 7 Command 134 Read Real Variables Reads the value of the real variable associated with the index Request Data Bytes LE Unsigned 8 Real Variables Index Response Data Bytes o0 Unsigned 8 Real Variables Index Command Specific Response Codes 0 Success No Command Specific Errors 2 Miscellaneous Error Too Few Data
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