Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[unit]
(unit register)
Value range /
Setting options
Access
level
10558 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
9129 Unsigned / 2 Digital input val‐
ue
Input value if config‐
ured to digital input.
- 0 - 1 Read
only
Channel 4
Table A-108 Channel 4
Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[unit]
(unit register)
Value range /
Setting options
Access
level
9303 Float / 4 Current output
value
Output current value if
configured to current
output.
- - Read
only
9328 Unsigned / 2 Error status Error status if config‐
ured to current output.
-
● Bit 0: Overflow
● Bit 1: Underflow
● Bit 2: Fail mode
activated
● Bit 3: Cable break
● Bit 4: Output current
cannot be
established (read
back deviation > 0.1
mA)
Read
only
9340 Unsigned / 2 Status output Status value if config‐
ured to status output.
- 0 - 1 Read
only
9469 Float / 4 Pulse status
output
Amount done if config‐
ured to pulse output.
- - Read
only
9472 Unsigned / 2 Error status Error status if config‐
ured to pulse output.
-
● Bit 0: The pulse
output has reached
the maximum pulse
output frequency
● Bit 1: Fail mode is
activated
Read
only
9487 Unsigned / 4 Pulse counter Pulse output since
startup.
- - Read
only
9400 Float / 4 Frequency out‐
put value
Frequency value if con‐
figured to frequency
output.
- - Read
only
Modbus communication
A.9 Modbus holding registers tables
SITRANS FST030 (Modbus)
310 Operating Instructions, 08/2018, A5E37367739-AD