10 FUNCTIONS
10.7 Common Functions of the I/O Module with Diagnostic Functions
181
10
10.7
Common Functions of the I/O Module with
Diagnostic Functions
LED indication setting on error condition
This function helps set the indication of the I/O status indicator LED when a minor error occurs.
The following figure shows the LED status in normal and abnormal conditions.
LED indication on error condition
The ERR LED turns on when a minor error is detected.
The indication of the I/O status indicator LED when a minor error is detected can be set in "LED display settings during an
error".
■
Do not display I/O error
The ON/OFF state of an I/O is indicated.
When the ERR LED is on, check with the error history to identify the I/O where an error occurred.
■
Always display I/O error
Only the LED of an I/O with an error turns on. The LED of an I/O without error is off. (The ON/OFF state of input/output cannot
be indicated.)
The indications of the ALM LED, ERR LED and I/O status indicator LED help identify the input/output with an error.
■
Display I/O status and error switching (1 second interval)
The LED indication is switched between "Do not display I/O error" and "Always display I/O error" at the interval of a second.
Check for the I/O with an error with the error history.
Setting procedure
Set the following item from "Basic setting".
[Navigation window]
[Parameter]
[Module Information]
Target module
[Module Parameter]
[Basic setting]
"LED display settings during an error"
When "LED display settings during an error" is set to "Display I/O status and error switching (1 second
interval)", an item displayed in the "Module Diagnostics" window is partly restricted. For details, refer to the
following.
Page 192 Module Information List
Normal condition
Off (I/O off)
On (I/O on)
On
On/off/flashing
I/O status indicator LED
Error condition
ALM/ERR LED
Error
detected
Error
eliminated
I/O status
indicator LED
Summary of Contents for MELSEC iQ-RX40NC6B
Page 1: ...MELSEC iQ R I O Module With Diagnostic Functions User s Manual Application RX40NC6B RY40PT5B ...
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Page 125: ...4 OVERVIEW 123 4 MEMO ...
Page 191: ...12 MAINTENANCE AND INSPECTION 189 12 MEMO ...
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