Siemens SITRANS FST030 - Page 266

Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units register)
Value range /
Setting options
Access
level
2048 Float / 4 Fail-safe value
Sensor temper‐
ature
Input value in case of a
fault and when Fail-
safe behavior is config‐
ured to 1. Applicable if
process value (2002) =
5.
20.0
[°C]
(7700)
-50.0 - +250.0 Read /
write
2054 Float / 4 Fail-safe value
auxiliary tem‐
perature
Input value in case of a
fault and when Fail-
safe behavior is config‐
ured to 1. Applicable if
process value (2002) =
6.
20.0
[°C]
(7700)
-50.0 - +250.0 Read /
write
Channel 5 RTD configuration settings
Table A-69 Channel 5 RTD configuration settings
Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units register)
Value range /
Setting options
Access
level
2102 Float / 4 RTD wire resist‐
ance
Resistance of cables in
a 2 wire RTD system.
0
[ohm]
0.0 - 50.0 Read /
write
2106 Float / 4 Offset Calibration offset. 0
[°C]
(7700)
-100.0 - +100.0 Read /
write
2108 Float / 4 Slope Calibration slope. 1.0 0.5 - 2.0 Read /
write
Channel 6 RTD configuration settings
Table A-70 Channel 6 RTD configuration settings
Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units register)
Value range /
Setting options
Access
level
2104 Float / 4 RTD wire resist‐
ance
Resistance of cables in
a 2 wire RTD system.
0
[ohm]
0.0 - 50.0 Read /
write
2110 Float / 4 Offset Calibration offset. 0
[°C]
(7700)
-100.0 - +100.0 Read /
write
2112 Float / 4 Slope Calibration slope. 1.0 0.5 - 2.0 Read /
write
Modbus communication
A.9 Modbus holding registers tables
SITRANS FST030 (Modbus)
266 Operating Instructions, 08/2018, A5E37367739-AD