Model 2000 Flow Computer Instruction Manual
APPENDIX 3 GAS CHROMATOGRAPHS SUPPORTED
Model 2000 issue 21 Page No
86
APPENDIX 3i Siemens Maxum II Chromatograph.
When communicating with the Siemens Maxum II Gas Chromatograph the Model 2000 request the following data.
Address Modbus Function Function Values Alarms
0 = Running No alarm 1100 Read Coil Status Analyser Online
1 = Stopped Acc Offline alarm
0 = Not Active Nacc Stream alarm 1101 Read Coil Status Stream 1 Active
1 = Active No alarm
0 = Not Active No alarm 1105 Read Coil Status Stream 20 Validation
1= Active No alarm
0 = Not Active No alarm 1107 Read Coil Status Stream 30 Active
1= Active No alarm
0 = Not Active No alarm 1109 Read Coil Status Calibration Status
1= Active No alarm
0 = Not Active No alarm 1111 Read Coil Status New Data Ready
1= Active No alarm
1000 = No Errors No alarm 30001 Read Input Registers Chromatograph Status
Anything Else Acc Status Alarm
40102 Read Holding Registers Methane Molar %
40104 Read Holding Registers Ethane Molar %
40106 Read Holding Registers Propane Molar %
40108 Read Holding Registers i-Butane Molar %
40100 Read Holding Registers n-Butane Molar %
40112 Read Holding Registers i-Pentane Molar %
40114 Read Holding Registers n-Pentane Molar %
40116 Read Holding Registers neo-Pentane Molar %
40118 Read Holding Registers n-Hexane+ Molar %
40120 Read Holding Registers Carbon Dioxide Molar %
40122 Read Holding Registers Nitrogen Molar %
40124 Read Holding Registers Un-Normalised Total
40126 Read Holding Registers GCV (MJ/kg)
40128 Read Holding Registers GCV (MJ/m3)
40130 Read Holding Registers NCV (MJ/kg)
40132 Read Holding Registers NCV (MJ/m3)
40134 Read Holding Registers Relative density
40136 Read Holding Registers Wobbe (MJ/kg)
40138 Read Holding Registers Wobbe (MJ/m3)
40140 Read Holding Registers Standard density
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