12. Communication Design Examples 12.14 Communication between Delta PLC and Danfoss VLT6000 Series Adjustable Frequency Drive (RS Instruction) Control Purpose: z Controlling the start/stop status and reading out the frequency of Danfoss VLT6000 series frequency drive through communication by master PLC. Parameter Settings for VLT6000 Series frequency drive: Ъ If Danfoss VLT6000 frequency inverter can not run normally due to improper parameters, users can set VLT6000 to factory defaults: set P620 = 3 and press OK. Then set the parameters according to the above table. Devices: Control Program: M1002 Set communication format: 9600,8,E,1 Retain communication setting Set receiving timeout:
200ms Start VLT6000 to run forward in 25Hz and read the running frequency in D100~D107 DVP-PLC Application Examples 12-50 Parameter Set value Explanation P500 0 FC protocol : Serial communication protocol P501 1 FC communication address: 1 P502 5 FC communication baud rate: 9600 bps P503 1 Coasting stop controlled by serial communication P504 1 DC braking controlled by serial communication P505 1 Start controlled by serial communication DEVICE Function X0 Start/stop switch M0 Executing the 1st RS instruction M1 Executing the 2nd RS instruction MOV H87 D1120 SET M1120 MOV K200 D1129 MOV HE02 D100 MOV H1201 D101 MOV H0 D102 MOV H0 D103 MOV H0 D104 MOV H400 D105