Figure 103. Modbus/TCP-Specific Settings and Their Default Values
Start Register
Defines the offset added to the Starting Address field of the Modbus/TCP message. If set to 5, the output
messages are written from 40006 to 40025 instead of from 40001 to 40020.
Number of Registers
Defines the maximum number of registers according to the maximum length of the message to be transmitted. The
size of the message transmitted is constant, thus, it must be big enough to contain the largest barcode information.
Remote Address
Defines
the IP address of the server to which the client tries to connect.
Remote Port
Defines
the port number of the server to which the client tries to connect. It must be different from the port
numbers defined for other communications functions.
Remote Unit ID
Defines
the unit identifier used with Modbus/TCP devices that are composites of several Modbus devices, for
example on Modbus/TCP to Modbus RTU gateways. In these situations, the unit identifier tells the Slave Address
of the device behind the gateway. By default, Modbus/TCP-capable devices usually ignore the unit identifier
Connection Retry Time
Defines
a timeout (in milliseconds) for the Industrial Protocol Client before the client retries the connection between
the client and the server. If the connection is not successful, further retries are attempted after this timeout expires.
If set to 0 there is no retry attempt.
After changing settings, click
Play , Monitor , or Getting Started to activate the Industrial Ethernet
communications with the new settings.
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