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we have an ABB AC450 controller, with 2 redundant CI522A communication module and TC516 modem. During the last few months we found that the CI522A changeover from primary to redundant or vise-versa once every few months, with an error message on the system status list:
Bus error ERR=H 00000004
and we know that this error message is for "too high station address", and so it's not the reason of the change over. It came after the change over happened.
so please if any one know what the problem may be, please help.
Bus error ERR=H 00000004
and we know that this error message is for "too high station address", and so it's not the reason of the change over. It came after the change over happened.
so please if any one know what the problem may be, please help.