Tim Knowlden

I have text messaged the author of the Date and Time ladder, no response. can anyone else offer any help please?

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?

Few more days until the clock change, still cant get it working 

Hi, im still looking for help on this one if anyone can advise?

So i ordered this, plugged in and no problems at all, works with the ACPU.   However what doesnt work is that there are a couple of functions that ACPU doesnt support. TRD and TWRP  

  This is using the same rs232 to db25 that works on an old laptop with port. But its plugged into a rs232 to usb adaptor which has drivers installed and is recognised by Windows.

Drivers sourced here https://ftdichip.com/drivers/vcp-drivers/ But, as I say, it appears in Device Manager and Ive changed COM port to COM1, tried different speeds etc.

https://www.amazon.co.uk/gp/product/B01LVYR1AB/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1   This is the latest adaptor, Also tried this one prior to that https://www.amazon.co.uk/gp/product/B0859YX2J1/ref=ppx_yo_dt_b_asin_title_o06_s01?ie=UTF8&psc=1

Yes, it started as COM8, but ive tried changing in device manager various different COM ports.

  This is using the same rs232 to db25 that works on an old laptop with port. But its plugged into a rs232 to usb adaptor which has drivers installed and is recognised by Windows.

A long time since purchasing, but tested this today. FTDI drivers install okay, but cannot communicate with the ACPU PLC

The issue with this is that my new laptop does not have an rs232 port

I have purchased this, https://www.amazon.co.uk/dp/B0859YX2J1/ref=pe_27063361_487055811_TE_dp_1   Now though reading your comments I am unsure if this will work? I old laptop with rs232 port that I use, but it is terrible, so now have one with only a usb to use.

Hi, We have some spares at work already, but thank you

Thanks for thew advice guys, Dont worry I dont intend to add anymore than 1 output coil. the PLC is working perfectly now for my needs.

Hi, I am fairly new to PLCs, I am writing a gate/barrier autmation program, however I have Y0,1 & 3 Flickering and unable to signal their relays. 1 & 3 are barriers that need a pulse to open, 0 & 4 are gates that need to maintain to remain open. If you see in this screenshot Y000 is not ON when it is being called by M1. Yet in another image Y0004 is ON when being called by M1. This is in a simulator but works the same on the PLC, If i erase the program I can manually force on ALL outputs and the relays activate.

M8000 is not present on the A1ShCPU PLC. I also am not seemingly able to get a usb to rs232 connector to communicate via the rs232 to db25 connector

Okay so that helps then if I want to give certain coils priority too.  Its working now as it should so I'm glad I now understand it a bit better. Thanks 

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 

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?

Thansk for the information, that has confirmed to me why changing that to only have 1 output worked when I tested. Bizarre though how Y4 worked okay with multiple uses.