6. Redundancy with NX3030 CPU
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ATTENTION:
There are two command bits which normally must be turned off by the user:
DG_NX4010.tRedundancy.RedCmdLoc.bTestModeLocal and _NX4010.tRedundancy.
RedCmdLoc.bTestRelayLocal. Further details regarding these commands are described ahead in this
section. In case the user forgets to turn them off, there are automatic mechanisms which are
supposed to do it instead.
It’s important to stress that any command activating or deactivating are registered in the Redundancy
Event Log, which is important for the history analysis, e.g. to determine a switchover cause.
Next, the RedCmdLoc and RedCmdRem structure fields are defined:
Direct Representation
Variable
AT variable
DG_NX4010.tRedundancy.Re
dCmdLoc.*
TRUE – It’s a processed copy from the
TURN ON PLCx button written on the
PX2612 panel. This bit is activated 1 second
after the button pressing and deactivated
immediately at its releasing. It’s important to
stress that this bit will be activated when the
TURN ON button on the remote PLC is
pressed, as this type of command is always
sent by the remote PLC.
FALSE – The button TURN ON PLCx isn’t
pressed.
TRUE – It’s a processed copy from the
STAND BY button written on the PX2612
panel. This bit is activated 1 second after the
button pressing and deactivated immediately
at its releasing.
FALSE – The button STAND BY isn’t
pressed.
TRUE – It’s a processed copy from the
INACTIVE button written on the PX2612
panel. This bit is activated 1 second after the
button pressing and deactivated immediately
at its releasing.
FALSE – The button INACTIVE isn’t pressed.
TRUE – This diagnostics inform an automatic
configuration request, necessary to let the
Not-Configured state in some situations.
FALSE – Automatic configuration request
disabled.
TRUE – This command produces an
equivalent action to the TURN ON PLCX
button on the PX2612 in the local PLC.
FALSE – The TURN ON PLCx button on the
local PLC isn’t pressed.
TRUE – This command produces an
equivalent action to the STAND BY button on
the PX2612 in the local PLC.
FALSE – The STAND BY button on the local
PLC isn’t pressed.
TRUE – This command produces an
equivalent action to the INACTIVE button on
the PX2612 in the local PLC.
FALSE – The INACTIVE button on the local
PLC isn’t pressed.
TRUE – This command resets the NETA /
NETB statistics (see substructure SNET_Stat
in RedDgnLoc and RedDgnRem). Such
statistics are failure and success counters in
synchronization services.
FALSE – The reset commands for the NETA
/ NETB statistics in the local PLC wasn’t
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General