6. REDUNDANCY WITH NX3030 CPU
Direct Variable
AT variable
DG_NX4010.tRedundancy.
RedCmdLoc.*
Description
Variable Bit
FALSE – The reset commands for the
NETA / NETB statistics in the local PLC
wasn’t activated.
0 bTestModeLocal
TRUE – This command puts the PX2612
panel in test mode, allowing its com-
ponents to be tested (LEDs, relays and
buttons), as explained in PX2612 Panel
Test section. The PX2612 test mode is
only accepted when this bit is on both
PLCs. Therefore, for the PX2612 to
be in test mode, the PLC verifies if
RedCmdLoc.TestModeLocal and RedCm-
dRem.TestModeLocal are both on. The
RedDgnLoc.RedPanelTestMode diagnos-
tic is turned on to inform that the PX2612
is really in test mode. Normally the user
must turn off the TestModeLocal bit on
both PLCs as soon as the PX2612 tests are
concluded, but in case he forgets to do that,
the bit will be turned off automatically 15
minutes after being turned on.
FALSE – The command which puts the
PX2612 panel in test mode is deactivated.
1 bTestRelayLocal
TRUE – This command is used to test
the PX2612 NO relay and, consequently,
the external NC relay too, used to, even-
tually, turn off the other PLC. This com-
mand is only accepted while the PX2612 is
in test mode, being automatically switched
off and ignored if the PX2612 isn’t in this
mode. Normally, the user must turn off the
TestRelayLocal bit as soon as the relay test
is concluded, but if it’s forgotten, the bit
is turned off as soon as the test mode is
finished. It’s important to stress this com-
mand is only accepted in the Active PLC,
to avoid the Non-Active PLC to switch it
off.
FALSE – The command used to test the
PX2612 NO relay is deactivated.
%QB(n+56) 2 bStandbyRemote
TRUE – This command produces an equiv-
alent action to the STAND-BY button on
the PX2612 in the remote PLC.
FALSE – The STAND-BY button on the
remote PLC isn’t pressed.
3 bInactiveRemote
TRUE – This command produces an equiv-
alent action to the INACTIVE button on
the PX2612 in the remote PLC.
FALSE – The INACTIVE button on the re-
mote PLC isn’t pressed.
346
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