PM864 and PM864A compatibility
Our client have bought a replacement for a faulty PM864A controller working in a redundant pair. It has a label PM864 (without A) on the face and PM864AK01 (with A) on the tag (see photos attached).
We have updated the firmaware using the serial firmware update tool on the replacement controller to the version of the existing controller. In a single configuration the replacement controller starts normally, but in a redundant configuration with BC810 interconnection units the controller goes to fault (the fault LED blinking rapidly).
1. What is the real type of the replacement controller, PM864 or PM864A?
2. What's the difference between PM864 and PM864A?
3. Will PM864 and PM864A work together in a redundant configuration with or without BC810 interconnection units?
Voted best answer
Please take a look in the following link
From these documents I can see the following:
"PM864K01 Replaced by PM864AK01, which require;"
- Control Software version 3.2/10 or later,no application changes needed
PM864 - Clock Frequency 48MHz, Memory 16 MB
PM864A - Clock Frequency 96MHz, Memory 32 MB
As I remember, PM864A was introduced so long time ago. From the version I can see that happen during SB2 period, before 800xA to be introduced.
In the begining there was a procedure for Step-Up, free of charge replacement of PM864 to PM864A. Also, after replacement you received PM864A with more performance of the price of PM864.
Currently, only PM864A should be available
For the replaced CPU - did you configure the redundancy with IPConfig tool?
I think if you managed to load the same firmware to both CPU's, they have to work as redundant, at least without interconnection units (but with both cables - CEX and other one).
If I remember right, from the serial number on the picture, that CPU is produced in 2008, week 23
From the product guide
PM864A is equivalent to PM864 unless stated otherwise
Version 3.0 = PM865, PM861A, PM864A, BC810, SM810, CI854A, CI858, CI860 and SS823 are added, user doc 3BSE 030 827 R201
Version 2.1 = PM864 is added, user doc 3BSE 027 941 R301
Thank you all for your comments.
The product tag on the baseplate turned to be fake, the true controller model is PM864 produced in 2003 week 31 (see photos enclosed).
As expected, we couldn't run PM864 and PM864A in redundant configuration with BC810.