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7 I/O MODULES
MELSEC-ST
(1) Operating status LEDs
Input module
LED
indication
LED status
Operating status
On Normal
Flickering
(0.25s intervals)
Selected as the target of online module change
Flickering
(1s intervals)
Communication with the master station has stopped.*1
Parameter setting error *1
Other slice module fault
Internal bus error has occurred
RUN
Off
External power-off, internal bus error or hardware fault
On Hardware
fault
ERR.
Off Normal
*1: Refer to the head module manual for details.
Output module
LED
indication
LED status
Operating status
On Normal
Flickering
(0.25s intervals)
Selected as the target of online module change
Flickering
(1s intervals)
Communication with the master station has stopped.*1
Parameter setting error *1
Other slice module fault
Internal bus error has occurred
RUN
Off
External power-off, internal bus error or hardware fault
On
Hardware fault (All modules)
Fuse has blown. (ST1Y2-TE2, ST1Y16-TE2)
Flickering
(0.5s intervals)
Thermal protection and short circuit protection have
occurred. (ST1Y2-TPE3, ST1Y16-TPE3)
ERR.
Off Normal
*1: Refer to the head module manual for details.
Summary of Contents for MELESEC-ST
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Page 23: ...A 21 A 21 MEMO...
Page 114: ...10 22 10 22 10 MOUNTING AND INSTALLATION MELSEC ST MEMO...
Page 125: ...11 11 11 11 11 EMC AND LOW VOLTAGE DIRECTIVE MELSEC ST MEMO...
Page 163: ...Index 2 Index 2 MEMO Ind...
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