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I upgraded my HMI500 series to a new cMT HMI and I keep getting PLC No Response error. How do I get my comms working again?

If RS-232 Serial communications on COM1 were used in the original application, the pin out of the COM port has changed with the new cMT HMI. Pins 2 and 3 have been swapped and the gender has also changed. Purchasing a new serial cable specific to the new HMI is recommended. However, you can also purchase a null modem gender changer to be used on the HMI end of the cable.

I have an HMI500 Series unit and the screen is blank. I don’t have a copy of the original project, but the HMI is still operating. Can I pull the program out of it?

Yes, but if its on an OEM machine, you may want to check with them before you do anything. They may have an upgrade path for you already. You will need a special cable to…

I have an old HMI5104TH. What should I upgrade to?

Maple Systems offers several HMIs that provide an upgrade path for your HMI5104TH. For almost all conversions, the transition requires little effort. When considering which particular HMI to replace your HMI5104TH, please note that not all replacement models are identical. Any of our 10.1″ HMI’s are a replacement option. You’ll also need our 1420-5002 Adaptor Plate to help the new HMI fit in the existing panel cutout. The HMI5104TH was a 10.4″ screen

Is the cMT-iM21 an HMI?

The cMT-iM21 was  a 21″ HDMI® compatible display specifically designed for use with the cMT-FHDX. Its now discontinued and replaced by our 21″ MON Series Monitors. Contact our sales department for more information on our…