System Integration; Function Check - Siemens SITRANS F Modbus RTU RS 485 Operating Instructions Manual

System integration

This chapter provides information on how to integrate the flowmeter in a Modbus RTU
automation and control system.
The chapter shows the necessary steps in order to put the system into operation. After finishing
the steps, the system is ready to go into normal operation in the Modbus RTU automation control
system.
Transmitter settings
All Modbus settings of the transmitter are stored in the add-on module in a non-volatile memory.
All other transmitter settings are stored in the memory unit of the transmitter.
Note
If the communication module is replaced, all communication settings must be downloaded
from the master to the device.
Device Tag and address
The transmitter is shipped with a default device tag containing device name and serial number.
Each Modbus device has a unique physical device tag. A device tag is assigned to the device
when it is commissioned and it retains the tag in its memory when it is disconnected.
All devices are shipped with a temporary address that allows the host to automatically
commission the transmitter. The network address is the current device address used by the
fieldbus.
Note
It is recommended NOT to use the default address in a multi-slave network. It is of great
importance to ensure that no devices have the same address. Otherwise an abnormal behaviour
of the whole serial bus can occur, the master being unable to communicate with all present
slaves on the bus.
5.1

Function check

Before proceeding further, make sure that installation and connection have been performed
successfully.
• See chapter "Hardware installation (Page 11)" for installation verification.
• See chapter "Connecting (Page 17)" for connection verification.
When the function check has been successfully carried out, the device can be switched on.
Modbus RTU RS 485
Operating Instructions, 03/2021, A5E00753974-AB
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