Sierra Monitor Corporation 5100-06-IT - Manual (Page 46)

Model 5100-XX-IT Toxic Gas Sensor Module
Page: 42
Command 138: Apply ZERO Gas
This command will signal the module to accept the present sensor output to as the ZERO gas condition.
Request Data Bytes: None
Command Specific Response Data Bytes: None
Command 139: Apply SPAN Gas
This command will signal the module to accept the present sensor output to as the SPAN gas condition.
Request Data Bytes: None
Command Specific Response Data Bytes: None
Command 141: Force Gas Value
Request Data Bytes:
Byte Format Description
0 Unsigned-8 Sets the Force Gas Value, range 0 to 100
Command Specific Response Data Bytes:
Byte Format Description
0 Unsigned-8 Returns new Force Gas Value
Command 142: Reset Force Gas Value
This command will signal the module to set the Force Gas Value to 0.
Request Data Bytes: None
Command Specific Response Data Bytes: None
Command 143: Read MODBUS RTU Register
This command allows the reading of sensor module data as defined in the MODBUS RTU register map.
Request Data Bytes:
Byte Format Description
0-1 Unsigned-16 Address of Requested Modbus Register
40001 = lowest address
65535 = highest address
Command Specific Response Data Bytes:
Byte Format Description
0-1 Unsigned-16 Returns contents of selected Modbus Register
Command 144: Set Transducer Serial Number
This command allows user to add a device specific serial number, if required. This is different from the serial
number assigned by the Manufacturer.
Request Data Bytes:
Byte Format Description
0-2 Unsigned-24 Serial Number
Command Specific Response Data Bytes:
Byte Format Description
0-2 Unsigned-16 Returns new Serial Number