6. REDUNDANCY WITH NX3030 CPU
Direct Variable
AT Variable
DG_NX4010.tRedundancy
.RedDgn-
Loc.sGeneral_DiagExt.*
Description
Variable Bit
4 bFailedPBUS4B
TRUE – This PLC can’t communicate in
the master state (active or passive) in the
PROFIBUS 4 B network. The master
mode (communicating with slaves) is as-
sumed by the Active PLC. The passive
mode (communicating with the active mas-
ter) is assumed by the Non-Active PLC.
This failure can also be indicated in case
the NX5001 module has a microproces-
sor failure, or in case it can’t communicate
with the NX3030 CPU via bus.
FALSE – There aren’t failures in the
PROFIBUS 4 B network.
5 bFailureProfibus_4
TRUE – This PLC can’t communi-
cate in the master state (active or pas-
sive) in the PROFIBUS 4 network.
In case the PROFIBUS 4 network is
redundant, FailurePROFIBUS_4 results
from an AND logic between FailedP-
BUS4A and FailedPBUS4B. In case
the PROFIBUS 4 network isn’t redun-
dant, FailurePROFIBUS_4 is a copy from
FailedPBUS4A.
FALSE – There aren’t failures in the
PROFIBUS 4 network.
6 bFailureCommBusAny
TRUE – There is a failure in some commu-
nication fieldbus. As an example, an Eth-
ernet port with MODBUS protocol config-
ured to vital failure.
FALSE – No fieldbus has failures.
7 bFailureCommBusAll
TRUE – There is a failure in all fieldbus
communication. As example, NET 1 and
NET 2 are configured to vital and both are
in failure.
FALSE – There is at least one communica-
tion fieldbus working without failure.
%QB(n+48) - byFailedCommBusCount
Communication fieldbus quantity, which
are reporting failures.
0 bRemCpuKeepAliveNet1
TRUE – The NX3030 CPU is receiving
Keep Alive packets from the other half-
cluster’s CPU, through NET 1. The Keep
Alive packets are only sent in projects
that don’t use the PX2612 panel and that
haven’t a PROFIBUS network.
FALSE – Keep Alive packets aren’t being
received.
%QB(n+49) 1 bRemCpuKeepAliveNet2
TRUE – The NX3030 CPU is receiving
Keep Alive packets from the other half-
cluster’s CPU, through NET 2.
FALSE – Keep Alive packets aren’t being
received.
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