Using Status Data For Troubleshooting; Clearing The Rx3I Fault Tables - GE PACSystems RX3i User Manual

5.4.2 Using Status Data for Troubleshooting

There are three main types of status data available to the RX3i application program:
1) FT Output of the COMMREQ Function Block: This output is set if there is a programming
error in the COMMREQ Function Block itself, if the rack and slot specified in the COMMREQ
SYSID parameter is not configured to contain an Ethernet interface, or if the data block length
specified in the Command Block is out of range. This output may also indicate that no more
COMMREQ functions can be initiated in the ladder program until the Ethernet interface has
time to process some of the pending COMMREQ functions.
If the FT Output is set, the CPU does not transfer the Command Block to the Ethernet
interface. Under these circumstances, the other status indicators are not updated for this
COMMREQ.
2) Status Bits: The status bits are updated by the Ethernet interface in the RX3i CPU reference
table once each Controller scan. These bits are generally used to prevent initiation of a
COMMREQ function when certain errors occur or to signal a problem on an established
channel. The status bits include the LAN Interface Status bits and the Channel Status bits. The
starting location of these bits is set up when the module is configured.
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The LAN Interface Status (LIS) Bits monitor the health of the Ethernet interface itself,
such as the LAN Interface OK bit.
3) Communications Status Word: The COMMREQ Status word (CRS word) provides detailed
information on the status of the COMMREQ request. The communications status word is not
updated in the CPU each scan as are the status bits. They are generally used to determine
the cause of a communication error after the COMMREQ function has been initiated. The
cause is reported in the form of an error code. The COMMREQ Status word (CRS word) is
returned from the Ethernet interface to the RX3i CPU immediately if the Command Block
contains a syntax error or if the command is local. The location of the CRS word is defined in
the Command Block for the COMMREQ function. Refer to Section 6.9.

5.4.3 Clearing the RX3i Fault Tables

Clearing the RX3i CPU and/or I/O Fault Tables has no effect on the EIS001, nor does it clear the
EIS001 log information. This action merely clears the I/O Fault Table temporarily.
GFK-2949C July 2017
Chapter 5. Diagnostics
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