When booting the Siemens PCU that you have installed, it should be a relatively simple process, but there can be some problems that come up, so we wanted to go through a few to help anyone who is having issues. When the power supply is switched on, the PCU boots automatically. The system software is installed in the factory and is ready to run. The basic display appears on the screen if the MMC has booted successfully
Problems With Booting
PCU 20:
If the PCU 20 cannot make a connection with the NC, the message: “wait for NCU-connection:”x” seconds”, “x” = 1 to 60 appears. If a connection has still not been established after this time, then rebooting takes place soon after. Check the following:
PCU 50:
If the PCU 50 does not boot (screen remains dark), the 24VDC power supply must be checked. If the power supply is present at the power unit on the PCU 50 and the seven-segment display on the rear panel does not light up, then the PCU 50 is defective.
check the following:
(open links for testing)
For more info, email sales@mroelectric.com or visit our site here.
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