MODBUS Protocol
MODBUS Commands Supported
Thermo Electron Corporation 48i Instruction Manual C-9
40045&40046 ANALOG IN 7
40047&40048 ANALOG IN 8
40049&40050 NOT USED
40051&40052 NOT USED
40053&40054 NOT USED
Table C-2. Write Coils for 48i
Coil Number Action Triggered
101 ZERO MODE
102 SPAN MODE
103 SET BACKGROUND
104 CAL TO SPAN
105 AOUTS TO ZERO
106 AOUTS TO FS
Table C-3. Read Coils for 48i
Coil Number Status
1 AUTORANGE
2 LOCAL/REMOTE
3 SERVICE
4UNITS
5 ZERO MODE
6SPAN MODE
7 SAMPLE MODE
8GEN ALARM
9 CONC MAX ALARM
10 CONC MIN ALARM
11 INTERNAL TEMP ALARM
12 BENCH TEMP ALARM
13 PRESSURE ALARM
14 SAMPLE FLOW ALARM
Table C-1. Read Registers for 48i
Register Number Variable
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