Philadelphia Frank
Member
I’m sure I am going to be embarrassed when I read the solution to my problem. The machine I’m working on has a Panelview 300 and a Micrologix 1200. The Panelview had to be replaced. I tried to modify the logic to allow the machine to run without the Panelview but that was futile.
The Panelview communicates with the PLC using a DH485 protocol. The PLC and my laptop use the DF1. When I download the program to the PLC, it changes the protocol for the communications port to DH485. I read a warning that I will not be able to communicate with the PLC after this happens. Sure enough I don’t.
The Panelview and PLC talk okay. However, the PLC is not going into run mode. I believe the only way to put the Micrologix 1200 in Run mode is through the program but I can’t access the program once the shift is made to DH485.
What am I doing wrong?
Thank you for your time and help;
Frank
The Panelview communicates with the PLC using a DH485 protocol. The PLC and my laptop use the DF1. When I download the program to the PLC, it changes the protocol for the communications port to DH485. I read a warning that I will not be able to communicate with the PLC after this happens. Sure enough I don’t.
The Panelview and PLC talk okay. However, the PLC is not going into run mode. I believe the only way to put the Micrologix 1200 in Run mode is through the program but I can’t access the program once the shift is made to DH485.
What am I doing wrong?
Thank you for your time and help;
Frank