928B CPU135u not going to run mode and have led on the ZYK

Hi everybody,

I have a problem in a 928B CPU 135u
It is not going to run mode and have led on the ZYK

I Try to do Over All reset several times but when I Do COLD RESTART it goes to STOP mode

I've attached The ISTACK pages and BSTACK (PDF Type ) .

Best  regards

Hello,

please look at the PB30, FB 9.

Could be there a loop in the program?
The DB74 is also involved.

It looks like a operation which need to enough time (e.g.loop).

regards
CaOd

hi CaOd

Thank u for the replay .

I've attached FB9 & PB30

is there any chance that the problem in I/O module???

Best regards

Hi

I think that i solved the problem ( some I/O module have same address ) but now i have another problem

- CPU goes to RUN mode

- ADF LED blinking fast

- I can't enter ISTACK  Step 5 show the message " Wrong CPU mode "

any help !!!!!

ADF is an I/O address fault. Please make sure that you have all the I/O card start address set correctly and you have all the I/O Cards required required for your program.

If you did a changed the PLC program, please make sure you have not made a error and are using an I/O address that does not have an I/O card assigned. 

Create a cross reverence (XFR) or check your I/F/Q list and compare to the I/O cards you have.

Also the ISTACK can only be accessed if the PLC goes to Stop Mode.

Regards / m.f.g