User’s Manual of IMG-2x00T Modbus Gateway Series
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
Figure 4-5-20: Master Setup Page Screenshot
4.5.5.2 TCP
It is the same as priority master shown above, it means the request from port 1024 will be high priority. The screen in Figure
4-5-21 appears.
Figure 4-5-21: TCP Setup Page Screenshot
4.5.5.3 Request
The command type can also be made a priority request. Like the above, as requested by slave ID 3, function code 3 and data
00 00 00 03 will be high priority. The screen in Figure 4-5-22 appears.
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