6. Redundancy with NX3030 CPU
340
TRUE – This PLC can’t communicate in
the master state (active or passive) in the
PROFIBUS 3 network. In case the
PROFIBUS 3 network is redundant,
FailurePROFIBUS_3 results from a AND
logic between FailedPBUS1A and
FailedPBUS3B. In case the PROFIBUS 3
network isn’t redundant,
FailurePROFIBUS_3 is a copy from
FailedPBUS3A.
FALSE – There aren’t failures in the
PROFIBUS network.
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 assumed
by the Active PLC. The passive mode
(communicating with the active master) is
assumed by the Non-Active PLC. This
failure can also be indicated in case the
NX5001 module has a microprocessor
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.
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 assumed
by the Active PLC. The passive mode
(communicating with the active master) is
assumed by the Non-Active PLC. This
failure can also be indicated in case the
NX5001 module has a microprocessor
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.
TRUE – this PLC can’t communicate in the
master state (active or passive) in the
PROFIBUS 4 network. In case the
PROFIBUS 4 network is redundant,
FailurePROFIBUS_4 results from a AND
logic between FailedPBUS4A and
FailedPBUS4B. In case the PROFIBUS 4
network isn’t redundant,
FailurePROFIBUS_4 is a copy from
FailedPBUS4A.
FALSE – There aren’t failures in the
PROFIBUS 4 network.
TRUE – There is a failure in some
communication fieldbus. As an example,
an Ethernet port with MODBUS protocol
configured to vital failure.
FALSE – No fieldbus has failures.
TRUE – There is a failure in all fieldbus
communication. As example, NET1 and
NET2 are configured to vital and both are
in failure.
FALSE – there is at least one
communication fieldbus working without
failure.
communication fieldbus quantity, which are
reporting failures .
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.