ProSoft Technology PLX51-PBS, User Manual

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Operation
Page 36 of 83
Ensure that all application code making use of slave device data first
checks that the DataExchangeActive bit is 1.
IdentMismatch The device configured in the PLX50 Configuration Utility and the
device at the configured node address do not match because they
have different ident numbers.
1 – Online device Ident does not match configured device
0 – Online device and configured device ident match
DisabledByOutputAssembly This bit indicates if the device has not been enabled for data exchange
in the PLX51-PBS device enable control bits.
1 – Device has not been enabled for data exchange
0 – Device has been enabled for data exchange
DeviceError This bit indicates an error with the device.
1 – Device has an error
0 – Device has no error
The error flag will be set when one of the following conditions occur:

If there is an ident mismatch during slave parameterization.

When receiving any form of FDL fault (data link layer fault). For
example: SAP Not Activated or Resource Not Available.

When the data size of the DPV0 data exchange does not match
what has been configured in the PLX50 Configuration Utility.
This Error flag is transient and will clear once a valid response is
received.
AlarmPending Indicates the device has an alarm pending on the PROFIBUS network.
When the bit is set ‘1’, the device has an alarm pending that must be
unloaded.
When the bit is set ‘0’, the device does not have an alarm pending.
0 – The node has no alarm pending
1 – The node has an alarm pending
DiagnosticsPending Indicates the device has diagnostics pending on the local PROFIBUS
network.
When the bit is set ‘1’, the device has diagnostics pending that must
be unloaded.
When the bit is set ‘0’, the device does not have any diagnostics
pending.
0 – The node has no diagnostics pending
1 – The node has diagnostics pending
OutputAssemblyNodeAddrMismatch Indicates that there is a mismatch between the actual device station
address and the expected Logix mapping station address.
0 – Station address matches
1 – Station address mismatch
MappingCRCMismatch If there is a mismatch in the mapping between Logix and the PLX51-
PBS, it can result in data appearing in the incorrect location. This
means you can be sending incorrect data to a device which can have
unpredicted results.