Ethernet Communication Module IFD9506
DVP-PLC Operation Manual
master with the error code 0x0B.
For example, if station address 1 does not respond to Modbus function code 0x03 within the timeout
time, IFD9506 will respond to the master with "01 83 0B".
Please modify this parameter value according to the response time of the used product. The parameter
value should be less than the timeout setting of the upper computer.
Delay Time
Applicable mode: Serial Master
In general, Delay Time is used in RS-485 communication architecture. When RS-485 communication
fails frequently, you can increase this parameter value slightly. Since RS-485 communication is the half
duplex communication, it is not allowed to read and write data at the same time and the equipment
repeats the switch between transmission mode and reception mode during communication.
If the switching speed of RS-485 slave is not fast enough, the data packets transmitted by IFD9506
may be lost or the slave may not receive full data.
It is suggested you properly increase the setting value of Delay Time in milliseconds from the minimum
value so as to make the communication smooth. The setting value is an empirical parameter value
,
w
hich need be tested and adjusted on site for a long time based on the efficiency of the equipment
used together.
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