Modbus Communication
‑33‑
5. Double‑click ""NNeettwwoorrkk CCoonnffiigguurraattiioonn"" on the left. Double‑click the MODBUS
option in the menu of Serial Port > COM 0 on the right. A slave station is added to
the Modbus area in the screen center. If there are multiple slave stations, click
MODBUS multiple times to add multiple slave stations.
6. Double‑click the new Modbus slave station and set its number (this station number
must be same as the station number of the AC drive (set by Fd‑02)). Record the
value of Slave Enable Variable:SM.
7. Compile the PLC program as follows: Enable the slave station, set the AC drive
frequency to 50 Hz, and set the PLC to run 4000 scan cycles, during which the AC
drive runs forward in the first 2000 scan cycles, runs reversely in the last 2000 scan
cycles, and then decelerates to stop. The slave station must be enabled when you
compile the PLC program.
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