Modbus Communication; Modbus Addressing Model - Siemens SITRANS F Operating Instructions Manual

Modbus communication

A.1

Modbus addressing model

The device allows read/write access to one holding register block. All devices are mapped to
this Modbus address space.
A.2 Modbus communication
Table A-1 General Modbus settings
Modbus Data type /
register Size in
bytes
8291 Unsigned /
2
8005 Unsigned /
2
8297 Unsigned /
2
FST020 IP65 NEMA 4X
Operating Instructions, 09/2017, A5E41425845-AB
Parameter Description
Restart com‐ Restarts the communication using
munication configured slave address, baud rate
and parity/framing.
Slave address DIP switch setting on the transmitter
(HW) cassette. Address is used if DIP
switch is set to a value > 0.
Slave address Software address of Modbus inter‐
(SW) face. Address is used if switch is set
to 0.
Default val‐ Value range /
ue Setting options
[units]
(units
register)
-
● 0: Cancel
● 1: Restart
- -
1 1 - 147
A
Access
level
Write only
Read only
Read /
write
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