14: Modbus
PremierWave® XN Intelligent Gateway User Guide 123
Modbus Statistics
This read-only web page displays the current connection status of the Modbus servers listening on
the TCP ports. When a connection is active, the remote client information is displayed as well as
the number of PDUs that have been sent and received. Additionally, a Kill link will be present
which can be used to kill the connection.
To View Modbus Statistics
Using Web Manager
To view Modbus Statistics, click Modbus on the menu and select Statistics.
Modbus Configuration
This web page shows the current negotiated Modbus settings and allows configuration changes.
Table 14-3 Modbus Configuration
Note: The serial line protocol must also be configured for Modbus, in addition to
configuring the Modbus server. See Chapter 8: Line and Tunnel Settings on page 76 for
details.
To View and Configure the Modbus Server:
Using Web Manager
To configure Modbus settings, click Modbus on the menu and select Configuration.
Using the CLI
To enter the SSL command level: enable -> ssl
To enter the Credentials command level: enable -> ssl -> credentials
Using XML
Not applicable.
Modbus Configuration
Settings
Description
TCP Server State Select On or Off. If On, the Modbus server is active on TCP 502.
Additional TCP Server Port If present, is used in addition to TCP port 502.
Response Timeout The number of milliseconds to wait for a response on the serial side. The
device returns exception code 11 to the network master controller if the
slave serial device fails to reply within this time out.
RSS Trace Input If On, each PDU received on the Modbus serial line creates a non-
persistent descriptive item in the RSS feed.
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