Will a PLC-2 or PLC-5 Program/Run Key work in a PLC-3?
- Thread starter sanger
- Start date
Ken Roach
Lifetime Supporting Member + Moderator
I'll take some of that action, RussB !
As far as I know, there have been only three physical keyswitches on controllers in all of A-B history.
1747-KY1 fits SLC-500, ControlLogix, CompactLogix 1769, and FlexLogix controllers.
1768-KY1 fits CompactLogix 1768 series controllers
A126 fits PLC-2, PLC-3, PLC-5 controllers
But I don't know for absolutely certain about the PLC-3 keyswitch. The cardinal rule when I was working on PLC-3 controllers was "do not touch it unless you want to be blamed for whatever it does for the NEXT 25 years".
As far as I know, there have been only three physical keyswitches on controllers in all of A-B history.
1747-KY1 fits SLC-500, ControlLogix, CompactLogix 1769, and FlexLogix controllers.
1768-KY1 fits CompactLogix 1768 series controllers
A126 fits PLC-2, PLC-3, PLC-5 controllers
But I don't know for absolutely certain about the PLC-3 keyswitch. The cardinal rule when I was working on PLC-3 controllers was "do not touch it unless you want to be blamed for whatever it does for the NEXT 25 years".
Last edited:
Similar Topics
Can we use a Simotion D455 ethernet port x127 as a gate, to access S7-1500 plc Tia Portal program ?
In the Simatic manager, we used Netpro to do...
Posted this to Reddit with little success, so I figured I would share it here as well.
Very new to PLCs, but figured I would give it a shot to...
I'm a beginner in the automation field and I've set up an automation system connecting several devices (datalogger, radio, etc.) via Modbus RS485...
Hi All, want to ask.
I have PLC a programme to control the valve. The existing programme is to control valve A (Y22), and I want to change to...
can anyone has a good program to learn plc programming online. i have the basic looking into improve my skills
thanks