Siemens SITRANS F Series, Operating Instructions Manual, Page: 234 / 362

Modbus communication
A.9 Modbus holding registers tables
SITRANS F Ultrasonic flowmeters FST030 (Modbus)
232
Operating Instructions, 08/2017, A5E37367739-AC
Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units regis-
ter)
Value range /
Setting options
Access
level
9240 Float / 4 Fail-safe value Output value in case of
a fault and when Fail-
safe behavior (9239) is
configured to 4.
0.0
[Hz]
0.0 - 12500.0 Read /
write
7156 Float / 4 Forced value Forced value when
forcing is active.
1.0
[Hz]
0.0 - 12500.0 Read /
write
Channel 3 pulse output settings
Table A- 56 Channel 3 pulse output settings
Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units regis-
ter)
Value range /
Setting options
Access
level
9280 Unsigned / 2 Redundancy
mode
Redundancy mode. 0
•
0: Off. Channel 3
runs independently.
•
1: 90°. Channel 3
follows pulses on
channel 2 with a 90°
shift.
•
2: 180°. Channel 3
follows pulses on
channel 2 with a 180°
shift.
Read /
write
9260 Unsigned / 2 Process value Select process value
for the pulse output.
0
• 0: Mass flow
•
1: Volume flow
• 27: Standard volume
flow rate (only hydro-
carbon and gas ap-
plications)
Read /
write
9262 Unsigned / 2 Flow direction Flow direction filter. 0
• 0: Positive direction
•
1: Negative direction
• 2: Positive and nega-
tive directions
Read /
write
9265 Float / 4 Amount of vol-
ume
Amount value to gen-
erate an output pulse.
Applicable if process
value (9260) is set to 1.
0.001
[m
3
]
(8993)
- Read /
write
9263 Float / 4 Amount of
mass
Amount value to gen-
erate an output pulse.
Applicable if process
value (9260) is set to 0.
1.0
[kg]
(8992)
- Read /
write