I am currently having a problem with a T100MD2424 PlC I bought for a project recently. When I trip one of the inputs, all of the outputs begin flashing at a high frequency .
This is not happening each time I trip the input, only every second or third time. It also doesnt seem to matter which input I trip, as well, when I unhook the outputs completely, the output LED flashing continues.
I have also observed that the MCR ligh turns on when I apply 12 volts to load side of the outputs. I have everything hooked up properly for a "sinking" output, I have also hooked up the MCR input to a toggle to be able to switch the outputs on/off from the front panel. When I toggle the switch and apply 12V to the MCR input post, I get no change in the system.
I am in the installation phase and within several days will be ready for completion and start up. The 2424 PLC is currently installed to control the operation of a large composting processing plant.
I am using frequency hopping radio remote controls on the inputs. I am also using relays to turn the PLC inputs from NPN to PNP. As I was trying to trouble shoot the PLC, I unhooked all of the inputs and used a jumper to give me a high signal direct from ground. The outputs continued to flash at a high frequency.
I thought the remote controls might be causing some interferece, so I removed them from the system. I am also using relays on the outputs fire the hydraulic solenoid valves, I know I have these hooked up corrctly.
Any help you can give would be appreciated.
Thank You
