Cannot connect to PM554 with TK503
PM554 CPU without ETH port. No connection is possible from Control Builder to the CPU by means of serial port COM1.
It seems in ControlBuilder, in COM1 configuration, it is disabled Login (Check for CoDeSys Login), then downloaded to the controller and made Create Boot Project.
Now the CPU is running the sample application but it is not possible to Login and download changes to it.
Tried with different versions (CoDeSys, Control Builder ...)
Is there any procedure to restore factory default settings to the CPU in this case or to enable again Login from COM1?
Voted best answer
to reset the communication at default parameter, shut down the cpu and with the cpu de-energized, move the swithc from Run to Stop, then power on the cpu.
I have tested this procedure many times and it's functioning.
You can have access now with the CPU --> Com1
Then you must replace the communication parameter as your application need.
One different solution is to purchase one Com2 board, TA562 and the TK504 cable.
in this case you can access to the CPU with Com2 without modify the application.
I have tested the solution when the first Com1 is used as ModBus
Hope this help you