Reboot PLC

[sgull]

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.

Regards

Denis

 

[Saragani]

I'll open a bug on this issue, and we will try to reproduce it.

[Saragani]

Just one question. Where do you see the change in the output values?

 

1) In UniLogic online Debug

2) In HMI (An HMI element linked to an output)

3) In Ladder (Device, lamp, etc, connected to the output, so you literally saw the output being reset, set and reset again).

 

Thanks

[sgull]

Hi Saragani

I see it on the LED indications of the output modules (can also hear the relay outputs switching on/off)

When I hit reboot on the software I don't think I can be in online mode and it happens too fast to see it on the HMI.

Regards

Denis

 

[Saragani]

OK, I just wanted to confirm that it's not just wrong data sent to UniLogic during online, but an actual output that being set.

Thanks.