My basic requirement is that i want to synchronise CPU 928B and CP5431(6GK1543-1AA01).
I have the basic things like, I have written a program where i have called FB126 (send all) and FB127 (receive all) in OB1. I have called FB125 (SYNCHRON) block in OB20, OB21, OB22 and assigned proper parameters to it, i.e. I have set SSNR = 0 and the base SSNR set in CP5431 is also 0. The same CPU program is working fine with CP1430 and i have established communication between S5 CPU and WinCC over ethernet.For both communications(CP1430, CP5431) the CPU goes in run state. And I dont think there is any problem in CPU program. But i am facing problem in CP5431.
Coming to CP5431, i am using the COM5431E package for programming the CP. I have referred the "FDL connection over PROFIBUS between PC station and SIMATIC S5" and programmed the CP accordingly. But when i put the CP from stop to start, the STOP LED is lit continuously while the green LED lits up only for a few seconds, after that only the STOP LED glows. After this i am not able to access the CP. When i ask for CP status i get an error as "CP interface not ready".
Please can any one help me sort out this problem.
Thanking in advance.