Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[unit]
(unit register)
Value range /
Setting options
Access
level
9403 Unsigned / 2 Error status Error status if config‐
ured to frequency out‐
put.
-
● Bit 0: Overflow
● Bit 1: Underflow
● Bit 2: Fail mode
activated
Read
only
10603 Float / 4 Current input
value
Input current value if
configured to current in‐
put.
- - Read
only
10658 Unsigned / 2 Error status Error status if config‐
ured to current input.
-
● Bit 0: Overflow (> 25
mA)
● Bit 1: Underflow (< 0
mA)
● Bit 2: Measured
current out of
measuring range
Read
only
9329 Unsigned / 2 Digital input val‐
ue
Input value if config‐
ured to digital input.
- 0 - 1 Read
only
Modbus communication
A.9 Modbus holding registers tables
SITRANS FST030 (Modbus)
Operating Instructions, 08/2018, A5E37367739-AD 311