4.2 Modbus Setting
On the Modbus TCP/RTU network side, the gateway will act as a Modbus
TCP/RTU master. The gateway provides an internal memory for data exchange
between Modbus TCP/RTU and PROFINET. For each Modbus read/write
command, specify the internal memory address for data exchange. For the read
command, the information received from remote slave device will be updated to
the specified internal memory address. For the write command, the data in the
specified internal memory address will be sent to the remote slave device. The
data will be used to update the remote slave device register.
To access this page, click Protocol Setting > Modbus Setting
Start-up Mode Operation Mode
The setting is designated the action of all Modbus TCP/RTU commands at
system start-up stage. Please note that the setting can be selected only
when Status/Control Word is mapped to the PROFINET I/O area respectively.
Otherwise, Running mode is the only option.
Value
Description
Running
The Modbus TCP/RTU master starts to exchange data with
the slaves as soon as possible after start-up.
Idle
The Modbus TCP/RTU master does not exchange any data
with the slaves and waits for instructions via the control
