Automatically Adjust for BST

[Tim Knowlden 0]

Hi, its coming around to the time that I manually adjust forward the time of one of my PLCs.

I have for the last 5 years adjusted the time forward for BST in March, and backwards in October. 

I inherited this PLC at work and it produces a print out with date and time on for delivery receipts. I have never looked into if this can be automated without the need to adjust it twice a year, plugging it into a computer running gx developer, as that was what the previous maintenance engineer did?

Is there an easy way to add something to the ladder?

[NewVeganic 3]

This might work.I haven't tried it.

[Tim Knowlden 0]

3 hours ago, NewVeganic said:

This might work.I haven't tried it.

Amazing, ill try it before the clock change.

 

If d8000 is run I guess I'd need to switch the plc to stop and back to run on the date though or will it check this daily?

[NewVeganic 3]

M8000? M8000 is always on when running so you should be ok.

I remembered this was in the download section here, it's not my work and I haven't tried it.

Edited Saturday at 6:40 PM by NewVeganic

[Tim Knowlden 0]

16 hours ago, NewVeganic said:

M8000? M8000 is always on when running so you should be ok.

I remembered this was in the download section here, it's not my work and I haven't tried it.

Sorry, yes m8000. Will this constantly be triggering check of date then to allow adjustment of time. Or is this a one off check when plc is switched onto run? I'm trying to get my head around how the logic works 

[Ron_S 59]

Unless you have a HMI connected - I wouldn't bother.

The Mitsubishi internal clock is next to useless. It can gain nearly an hour over 1 year

Probably why the past engineer did it manually.

 

[JDennis 3]

On 3/19/2023 at 6:57 AM, Tim Knowlden said:

Sorry, yes m8000. Will this constantly be triggering check of date then to allow adjustment of time. Or is this a one off check when plc is switched onto run? I'm trying to get my head around how the logic works 

Yes.  M8000 is always on when PLC is in RUN mode.  If that is the trigger for the read/adjust it will do so every time the program scans.