Siemens SITRANS FST030 - Page 206

Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units register)
Value range /
Setting options
Access
level
8814 Unsigned / 2 Fail-safe behav‐
ior
Current output reaction
in case of a fault.
0
● 0: Lower fault current
● 1: Upper fault current
● 2: Last valid value
● 3: Disabled
● 4: Custom value
Read /
write
8815 Float / 4 Fail-safe value Output value in case of
a fault and when Fail-
safe behavior (8814) is
configured to 4.
0.0
[mA]
0.0 - 25.0 Read /
write
7146 Float / 4 Forced value Forced value when
forcing is active.
4.0
[mA]
3.5 - 25.0 Read /
write
8886 Float / 4 Offset adjust‐
ment
Command to trim the
lower range value of
the loop current.
Simulate a loop current
of 4.0 mA, measure the
current with an ampere
meter and write the
measured value to this
register.
[mA] 0.0 - 25.0 Write on‐
ly
8888 Float / 4 Gain adjustment Command to trim the
upper range value of
the loop current.
Simulate a loop current
of 20.0 mA, measure
the current with an am‐
pere meter and write
the measured value to
this register.
[mA] 0.0 - 25.0 Write on‐
ly
Modbus communication
A.9 Modbus holding registers tables
SITRANS FST030 (Modbus)
206 Operating Instructions, 08/2018, A5E37367739-AD