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Dear all
I have a problem to communicate with est panel through rs232 optional card as described below:
when SDU software(version 5.2) start to communicate with panel ,"the address of type of module "3-cpu3" cannot determined" error appears.
any one can help me please?

if you can send your database of SDU

good day,
try first to download in single step by RJ11 cable then will see what will happen.
regards,