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Reboot PLC


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Hi All

This is mainly for the program designers, but it may be worth others being aware of this.

I have a system with a unistream 10 and the latest software.

When I issue a reboot command when on line (just for testing or implementing new code) the following happens.

1. The PLC switches off all outputs that were on.

2. The PLC then switches on the same outputs again for 1 second.

3. The PLC then switches off the outputs and restarts.

Step 2 of this is a potential problem.

If a large motor or specific sequenced process were being controlled by these outputs, then unintentional pulsing could cause damage.




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