Download Model 42i NOx- User Manual

MODBUS Protocol
MODBUS Commands Supported
Response
MODBUS Commands
Supported
Field Name
(Hex)
Function
05
Output Address Hi
00
Output Address Lo
05
Output Value Hi
FF
Output Value Lo
00
Table C-1 through table C-3 lists the MODBUS commands supported for
the Model 42i NOx.
Table C-1. Read Coils for 42i NOx
C-8
42i NOx Instruction Manual
Coil Number
Status
1
AUTORANGE (NOx)
2
LOCAL/REMOTE
3
SERVICE
4
UNITS
5
ZERO MODE
6
SPAN MODE
7
NO MODE
8
NOx MODE
9
NOT USED
10
NOT USED
11
GEN ALARM
12
NOT USED
13
NOT USED
14
NOT USED
15
NOT USED
16
NOx CONC MAX ALARM
17
NOx CONC MIN ALARM
18
INT TEMP ALARM
19
CHAMB TEMP ALARM
20
COOLER TEMP ALARM
21
NO2 CONVERTER TEMP ALARM
22
NOT USED
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