Siemens SITRANS FST030 - Page 254

Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units register)
Value range /
Setting options
Access
level
9439 Unsigned / 2 Fail-safe behav‐
ior
Frequency output reac‐
tion in case of a fault.
2
● 0: Frequency value
low
● 1: Frequency value
high
● 2: Last valid value
● 3: Disabled
● 4: Custom value
Read /
write
9440 Float / 4 Fail-safe value Output value in case of
a fault and when Fail-
safe behavior (9439) is
configured to 4.
0.0
[Hz]
0.0 - 12500.0 Read /
write
7163 Float / 4 Forced value Forced value when
forcing is active.
1.0
[Hz]
0.0 - 12500.0 Read /
write
Channel 4 pulse output settings
Table A-64 Channel 4 pulse output settings
Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units register)
Value range /
Setting options
Access
level
9460 Unsigned / 2 Process value Select process value
for the pulse output.
0
● 0: Mass flow
● 1: Volume flow
● 27: Standard volume
flow rate (only
hydrocarbon and gas
applications)
Read /
write
9462 Unsigned / 2 Flow direction Flow direction filter. 0
● 0: Positive direction
● 1: negative direction
● 2: Positive and
negative directions
Read /
write
9465 Float / 4 Amount of vol‐
ume
Amount value to gener‐
ate an output pulse. Ap‐
plicable if process val‐
ue (9460) is set to 1.
0.001
[m
3
]
(8993)
- Read /
write
9463 Float / 4 Amount of mass Amount value to gener‐
ate an output pulse. Ap‐
plicable if process val‐
ue (9460) is set to 0.
1.0
[kg]
(8992)
- Read /
write
9467 Float / 4 Amount of
standard vol‐
ume
Amount value to gener‐
ate an output pulse. Ap‐
plicable if process val‐
ue (9460) is set to 27.
1.0
[Sl]
(8994)
- Read /
write
Modbus communication
A.9 Modbus holding registers tables
SITRANS FST030 (Modbus)
254 Operating Instructions, 08/2018, A5E37367739-AD