A.9.4.4 Inputs and outputs
General channel 2 settings
Table A-49 General channel 2 settings
Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units register)
Value range /
Setting options
Access
level
8801 Unsigned / 2 Operation mode Operation mode. 0
● 0: Off
● 1: Current output
● 2: Frequency output
● 3: Pulse output
● 4: Signal output
Read /
write
7420 Unsigned / 2 Active/passive
operation
Shows application pos‐
sibilities.
-
● 0: Active operation
not possible, use
passive wiring!
● 1: Active operation
possible, hardware is
able to drive the
current loop.
Read
only
9590 Unsigned / 2 Fail-safe activa‐
tion condition
Fail-safe activation con‐
dition.
1
● 0: Bad status of
selected process
value
● 1: Active
Maintenance alarm
or Failure (NAMUR)
Read /
write
8981 Unsigned / 2 Fail-safe min.
time
Minimum time the out‐
put stays in fail-safe be‐
havior.
0
[s]
0 - 100 Read /
write
Modbus communication
A.9 Modbus holding registers tables
SITRANS FST030 (Modbus)
Operating Instructions, 08/2018, A5E37367739-AD 199
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