Single Gas Sensor Module (SGSM)
Operations Manual
Super Systems Inc.
Page 7 of 30
Page 7 of 51
3.
Move the DIP switches accordingly for the Modbus address listed in Appendix A.
Secure the cover plate with the two screws.
Modbus Registers
The following table shows the Modbus registers for the SGSM. The name of the register,
address location, and description are provided.
NOTE: The gas percentage (multiplied by 10000) is located in register 1272.
Register Name
Register Location
Description
VERSION_NUMBER
0
current version number of the
firmware
UART_1_MODE
1
0 = slave, 1 = Sensor Driver
VERSION_NUMBER
0
Current version number of the
firmware
UART_1_MODE
1
0 = slave, 1 = Sensor Driver
UART_1_BAUD_RATE
2
Baud Rate:
0=1200,...,5=19200,...10=115200.
UART_2_MODE
3
0 = slave, 1 = Sensor Driver
UART_2_BAUD_RATE
4
Baud Rate:
0=1200,...,5=19200,...10=115200.
UART_3_MODE
5
0 = slave, 1 = Sensor Driver
UART_3_BAUD_RATE
6
Baud Rate:
0=1200,...,5=19200,...10=115200.
UART_4_MODE
7
0 = slave, 1 = Sensor Driver
UART_4_BAUD_RATE
8
Baud Rate:
0=1200,...,5=19200,...10=115200.
UART_5_MODE
9
0 = slave, 1 = Sensor Driver
UART_5_BAUD_RATE
10
Baud Rate:
0=1200,...,5=19200,...10=115200.
PV_VARIABLE
11
Actual process variable.
BOARD_ADDR
14
Board modbus address
(important for slave only)
MODEL_NUM
15
MODEL number Map as reg 900
SET_FACT_DEF
16
23205 = Full Defaults, 23206 =
H2 Defaults, 23207 = Loop 1