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Modbus communication
A.9 Modbus holding registers tables
SITRANS F Ultrasonic flowmeters FST030 (Modbus)
Operating Instructions, 08/2017, A5E37367739-AC
269
Modbus
register
Data type /
Size in bytes
Parameter
Description
Default value
[units]
(units regis-
ter)
Value range /
Setting options
Access
level
2048
Float / 4
Fail-safe value
Xdcr tempera-
ture
Input value in case of a
fault and when Fail-
safe behavior is con-
figured 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 con-
figured 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- 68 Channel 5 RTD configuration settings
Modbus
register
Data type /
Size in bytes
Parameter
Description
Default value
[units]
(units regis-
ter)
Value range /
Setting options
Access
level
2102
Float / 4
RTD wire re-
sistance
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- 69 Channel 6 RTD configuration settings
Modbus
register
Data type /
Size in bytes
Parameter
Description
Default value
[units]
(units regis-
ter)
Value range /
Setting options
Access
level
2104
Float / 4
RTD wire re-
sistance
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