User`s manual

5-4 Series 90™-30 CPU with Embedded PROFIBUS Interface – November 2004 GFK-2334A
5
PLC Fault Table Entries
Communications errors are displayed in the PLC fault table. For information on using fault
tables, refer to the programming software’s online help. For details on the effects of the
different types of faults on PLC behavior, refer to the Series 90-30 Reference Manual,
GFK-0467.
Note: Slave communications status events (loss and re-establish) are reported to the
PLC fault table by default. If the Slave Status Fault Table Entries parameter in
the PROFIBUS Master software configuration is set to False, these events are not
reported to the fault table. (For information on software configuration, see
chapter 3.)
There are two I/O Faults that can be logged by the PROFIBUS Master CPU366:
 Loss of Device - This fault is logged whenever there is a PROFIBUS fault detected on
a configured slave, such as a timeout. That is, whenever the device bit in the Slave
Status Table transitions from 1 to 0, this fault will be logged if there is not a
LossOfNetwork.
 Addition of Device - This fault is logged whenever the device bit in the Slave Status
Table transitions from 0 to 1, indicating that a device is active in the PROFIBUS scan
list.
The following figure shows the I/O fault table display in the Machine Edition software.
Rack.Slot location
of PROFIBUS
Master
A
ddress of first input
data area configured in
PROFIBUS Master
Slave I/O number