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DF_144996763-Newcomer
3-Newcomer
February 20, 2026
Solved

Communicating to a AB PLC5/250 Pyramid Integrate

  • February 20, 2026
  • 2 replies
  • 56 views

We need to pull data out of an old 5/250 but Kepware is preventing us from entering the address as they need to be.  the PLC5 architecture is "N7:40" for example but in the PLC5/250 it requires a leading digit to identify which module the address is in so "N7:40" in a 5/250 would be "0N7:40". 

 

Has anyone had any experience with this?

 

THank you,

Dean

Best answer by MKhatri

Greetings!!

A simple way to handle PLC‑5/250 addressing in Kepware is to remember that each data table must include its module prefix, so instead of using N7:40,
you must enter it with the required slot identifier like 0:N7:40, which tells Kepware which logical module the address belongs to within the 5/250 chassis.

Regards,
Mohit

2 replies

S
SlidingDownhill12-Amethyst
12-Amethyst
February 23, 2026

I address them as N7:4 etc. I don't need a leading digit.

Are you using 'Allen Bradley Ethernet' as the driver?

M
MKhatri15-MoonstoneAnswer
15-Moonstone
March 10, 2026

Greetings!!

A simple way to handle PLC‑5/250 addressing in Kepware is to remember that each data table must include its module prefix, so instead of using N7:40,
you must enter it with the required slot identifier like 0:N7:40, which tells Kepware which logical module the address belongs to within the 5/250 chassis.

Regards,
Mohit

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