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MELSEC-Q
4 SETUP AND PROCEDURES BEFORE OPERATION
4.3 Part Identification Nomenclature
The name of each part of the A/D converter module is listed below.
Number
Name and
appearance
Description
1) RUN LED
Displays the operating status of the A/D converter module.
On : Normal operation
Flickering : During offset/gain setting mode
Off
: 5V power supply interrupted, watch dog timer
error or module exchangeable status during
online module change bled
2) ERR. LED
Displays the error status of the A/D converter module.
On
: Error
1
(A/D conversion continues.)
Flickering : Error
1
(A/D conversion stops.)
Off : Normal operation
3) ALM LED
Displays the warning status of the A/D converter module.
On
: An alarm (process alarm, rate alarm) is being
generated.
Flickering : An input signal error is being generated.
Off : Normal operation
4)
Check terminals
(Q62AD-DGH only)
Terminal used to check the analog input current value.
(See Section 4.4.2)
5)
External supply
power terminal
(Q62AD-DGH only)
Terminal to connect 24VDC external supply power.
6) Serial No. plate Displays the serial number of the A/D converter module.
1: Check the error code for details.
POINT
When two or more errors have occurred, the latest error found by the A/D converter
module is displayed on the LED.
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