Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
1
(units register)
Value range /
Setting options
Access lev‐
el
10307 Unsigned / 4 Modbus coil bit‐
mask 2
Bit mask which is compared
against the register value
specified with Modbus coil reg‐
ister 2 to determine the coil
value. If any bit of the register
value is set which is also set in
the bit mask then the coil val‐
ue is true otherwise false.
0 0 - 4294967295 Read / write
10309 Unsigned / 2 Modbus coil
length 2
Output parameter that informs
about size in bytes of parame‐
ter that is specified by Modbus
coil address 2. Could be used
to identify the relevant bits of
the Modbus coil bitmask 2
- Read only
...
10399 Unsigned / 2 Modbus coil
length 20
Output parameter that informs
about the size in bytes of the
parameter that is specified by
Modbus coil address 20.
Could be used to identify the
relevant bits of the Modbus
coil bitmask 20
- Read only
1
If default value is "-" the command "Set to default" will not set this parameter to default.
A.4 Modbus register mapping
The device provides the possibility to map each existing parameter to a freely chosen Modbus
register for communication purposes over channel 1.
Modbus communication
A.4 Modbus register mapping
SITRANS FST030 (Modbus)
136 Operating Instructions, 08/2018, A5E37367739-AD