MG-11x Series User Manual

User’s Manual of MG-11x Modbus Gateway Series
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4.5.4.3 Parameters
This function allows setting the value for serial port COM configuration. Press the “Apply” button to set the value and the
screen in Figure 4-5-19 appears
Figure 4-5-19: Parameters Setup Page Screenshot
The page includes the following fields:
Object Description
• Initial Delay
You can make the IP218 wait for some Modbus slave devices may take more time to
boot up. It will force the IP218 to wait the initial delay setting before booting completes.
• Listen Port
This parameter (default:502) means the TCP port t communicates with the connected
device.
• TCP Exception
If this setting is enabled, IP218 will return an exception in response when there is no
response from the slave. If it’s disabled, it will do nothing when there is no response.
• TCP Timeout
This parameter (default:1000) is used to configure how long IP218 will wait for a
response from a Modbus TCP slave. If there is no response from the slave, the master
will ignore and continue next step. This makes the Modbus system work improperly
even if a Modbus slave device is faulty.
4.5.5 Priority Control
It’s a mechanism that Modbus Messaging Priority Control can make a certain requests for more immediate response times. It
will be arranged to the front of queue to be sent when Modbus gateway detects a priority request
4.5.5.1 Master
The priority rule can be assigned by master (serial port or IP address). As above, it means the request from serial port 1 or
192.168.0.123 will be considered a priority request. The screen in Figure 4-5-20 appears