What is the difference between PLC-5 modified and non modified version?

Just guessing....

There were "secure" versions of the 5/15 and 5/25 known as 5/16 and 5/26. Perhaps that is what they're referring to. I have no idea how they were "secured", but apparently prevented unauthorised program modification.
 
Gerry said:
Just guessing....

There were "secure" versions of the 5/15 and 5/25 known as 5/16 and 5/26. Perhaps that is what they're referring to. I have no idea how they were "secured", but apparently prevented unauthorised program modification.
Click to expand...

Could it be, master password (by Rockwell) cannot work in secured PLC (like CLX). The normal SLC/MLX can be override by a Master password by rockwell, no matter how OEM locks it :)
 
It doesn't have to do with security.

The "R" version of the PLC-5 Classic had a special jumper that disconnected the RAM and the real-time-clock from the battery when the chassis power was shut down. I don't know why they wanted it, but A-B built this variation for one specific Japanese customer.

The controller is otherwise totally firmware compatible with ordinary PLC-5 Classic controllers.
 
Ken Roach said:
It doesn't have to do with security.

The "R" version of the PLC-5 Classic had a special jumper that disconnected the RAM and the real-time-clock from the battery when the chassis power was shut down. I don't know why they wanted it, but A-B built this variation for one specific Japanese customer.

The controller is otherwise totally firmware compatible with ordinary PLC-5 Classic controllers.
Click to expand...


This means that the program in the RAM and clock will all be resetted :) when the power is down?
 

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