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Below you’ll find some of the most frequently asked questions about the GE Fanuc line of PLCs when it comes to tech support!
What software is available to program and troubleshoot GE Series 90-30 PLCs?
You have the choice of three different software packages for troubleshooting your GE 90-30. They are:
When I try to download the configuration to my Series 90 CPU, the download fails because passwords are disabled. How do I fix this?
When you try to download a configuration where the CPU is configured for “Passwords Enabled” and the CPU being downloaded is set for “Passwords Disabled,” you get this error.
When you disable passwords in a Series 90 CPU, there’s only one way to download a configuration where the CPU is configured for “Passwords Enabled,” and that is to completely erase the memory in the target CPU.
You can do this by turning off the CPU, disconnecting the battery, and then turning the CPU back on with the battery still disconnected. This will enable the memory to clear. In some cases, you may have to clear the memory by shorting out a super-capacitor on the CPU module. This is done by removing the CPU from the baseplate and shorting across two solder pads labeled “MEM CLR” for about ten seconds.
Once the memory is erased, a configuration with “Passwords Enabled” can be downloaded onto the CPU.
Alternatively, you could also change the configuration being downloaded to a “Passwords Disabled” setting and then download the configuration onto the CPU. You should only do this when passwords aren’t a problem.
My Series 90 CPU stopped. How do I identify the cause?
Check the LEDs on your power supply as well as the CPU. Key ones to check are the POWER LED (which will indicate the health of your power supply) and the OK LED (which will indicate the health of your CPU). If both of these are fine, then use one of the available programming packages (the three software programs mentioned above) to connect to the Series 90 programming port and check the PLC and I/O fault tables. These will help you find the root cause of your problem. Note that if the OK LED light is out, the software won’t be able to communicate.
My PLC will not communicate to the programming port on my Series 90 CPU. What are the possible causes of this problem?
There could be several causes of the problem. They include:
If your problem isn’t solved after checking all these things, call our technical support specialists at 1-866-599-6507.
Can I program my Series 90-30 IC693 CPU364, CPU372, and CPU374 through the serial port on the CPU module?
No. This port is for the Ethernet Station Manager only!
Can I use the external 24VDC output on the Series 90-30 power supply to power external devices?
Yes, but you should be aware that using this output will reduce the amount of current available on the 24VDC output that goes to the Series 90-30 modules via the baseplate. There’s only 0.625A total available current on the 24VDC output of the power supply.
Don’t hesitate to contact our tech support department with any other questions regarding your GE Fanuc Series 90-30 PLC at 1-866-599-6507. We’re always here to help at Qualitrol!
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