I am programming an AB Compact Logix PLC (1769-L33ER) to control a PowerFlex 525-EENET VFD. I have the following questions:
1. I read on another thread that the "Start" command should be given to the VFD until the "Active" bit becomes 1. The same goes for the "Stop" command which should be given until the "Active" bit becomes 0. Is this true for other commands like forward and reverse or should these commands be given continuously?
2. What information do the DigIn1Active...DigIn4Active, CommFreqCnt, and CommLogicCnt tags tell the PLC?
3. What parameters do you recommend adding to the Input and Output Data in the Module Definition? I currently have output current, fault code 1, and Com Sts-Emb Enet for the Input Data. For output data I have selected only Jog Frequency. This VFD is controlling a conveyor but, I am curious what parameters people find useful/applications of these parameters in the PLC program.
Thanks!
1. I read on another thread that the "Start" command should be given to the VFD until the "Active" bit becomes 1. The same goes for the "Stop" command which should be given until the "Active" bit becomes 0. Is this true for other commands like forward and reverse or should these commands be given continuously?
2. What information do the DigIn1Active...DigIn4Active, CommFreqCnt, and CommLogicCnt tags tell the PLC?
3. What parameters do you recommend adding to the Input and Output Data in the Module Definition? I currently have output current, fault code 1, and Com Sts-Emb Enet for the Input Data. For output data I have selected only Jog Frequency. This VFD is controlling a conveyor but, I am curious what parameters people find useful/applications of these parameters in the PLC program.
Thanks!