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8
TROUBLESHOOTING
8.2 Troubleshooting
8.2.5 When "ALM" LED flashes
8 - 4
1
OVERVIEW
2
SYSTEM
CONFIGURATION
3
SPECIFICATIONS
4
PROCEDURES AND
SETTINGS BEFORE
SYSTEM OPERATION
5
UTILITY PACKAGE
(GX CONFIGURATOR-TI)
6
PROGRAMMING
7
ONLINE MODULE
CHANGE
8
TROUBLESHOOTING
8.2.5 When "ALM" LED flashes
8.2.6 When "ALM" LED turns on
8.2.7 When Disconnection detection signal (XC) turns ON
8.2.8 When measured temperature value cannot be read
Table 8.6 When "ALM" LED flashes
Check Item Corrective action
Is the wire connected properly (not disconnected)?
Check the Disconnection detection flag (Un\G49) and take the
corrective action given in Section 8.2.7.
Table 8.7 When "ALM" LED turns on
Check Item Corrective action
Has a warning output occurred? Check the Warning output flag (Un\G47 and Un\G48).
Table 8.8 When Disconnection detection signal (XC) turns ON
Check Item Corrective action
Is the RTD connected correctly? Connect the RTD correctly.
Is the wire connected to the RTD not disconnected?
Check the conductive status of the connected RTD and replace
the disconnected RTD.
Is the channel where no RTD is connected set to
"conversion enable"?
Check the conversion-enable channels and the channels where
RTD is connected, and set the conversion enable/disable setting
correctly.
Table 8.9 When measured temperature value cannot be read
Check Item Corrective action
Is the Conversion enable/disable setting (Un\ G0) of the
channel to be used set to "conversion disable"?
Set the Conversion enable/disable setting (Un\ G0) of the channel
to be used for "conversion enable" using a sequence program or
GX Configurator-TI.
Is the programmable controller CPU set for STOP? Set the programmable controller CPU for RUN.