6. REDUNDANCY WITH NX3030 CPU
Direct Variable
AT Variable
DG_NX4010.tRedundancy
.RedDgn-
Loc.sGeneral_DiagExt.*
Description
Variable Bit
0 bFailedPBUS3A
TRUE – This PLC can’t communicate in
the master state (active or passive) in the
PROFIBUS 3 A 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 3 A network.
1 bFailedPBUS3B
TRUE – This PLC can’t communicate in
the master state (active or passive) in the
PROFIBUS 3 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 3 B network.
2 bFailureProfibus_3
TRUE – This PLC can’t communi-
cate in the master state (active or pas-
sive) in the PROFIBUS 3 network.
In case the PROFIBUS 3 network is
redundant, FailurePROFIBUS_3 results
from an AND logic between FailedP-
BUS3A and FailedPBUS3B. In case
the PROFIBUS 3 network isn’t redun-
dant, FailurePROFIBUS_3 is a copy from
FailedPBUS3A.
FALSE – There aren’t failures in the
PROFIBUS 3 network.
%QB(n+47) 3 bFailedPBUS4A
TRUE – This PLC can’t communicate in
the master state (active or passive) in the
PROFIBUS 4 A 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 A network.
342
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