31
The event register can be read by the L com-
mand only once. Should a fault occur, for ex-
ample, in the data communication, the B com-
mand can be used to re-read the contents of the
register. When required, the B command can
be repeated. Generally, the control data com-
municator reads the event data and forwards the
information to an output device. Under nor-
mal conditions the event register of the relay
module is empty. The control data communi-
cator also resets abnormal status data, so this
data is normally zero.
The setting values S1...S13 are values used by
the checking functions. All main settings S21...
S33 and second settings S41...S53 can be read
and written. The condition for writing is that
the remote set password has been opened.
When a setting value is changed, either by means
of the push-buttons on the front panel or over
the serial communication bus, the relay mod-
ule checks whether the given parameter value is
legal, that is, within the permitted range. A value
outside the permitted setting range will not be
memorized, but the previous setting value will
be retained.
Activation of the self-supervision function (V165)
prevents the synchro-check relay from operat-
ing during the time when the self-supervision
output is active and the IRF LED is lit.