Mitsubishi QJ71C24N User Manual page 11

(1) LED display list
QJ71C24N
RUN
NEU.
SD
CH1
RD
Display
CH LED
contents
Normal
RUN operation
-
display
Error display
ERR.
(*1)
Neutral status
NEU.
on the CH1 side
(*3)
display (*2)
CH1
Transmission
SD
status display
Reception
RD
status display
Neutral status
NEU.
on the CH2 side
(*3)
display (*2)
CH2 Transmission
SD
status display
Reception
RD
status display
1: This LED comes on when an error occurs at Q series C24 hardware
or during data communication.
2: This LED displays the data communication status via MC protocol.
On: Waiting for the command message to be received from the
external device.
Off: Processing the command message received from the external
device.
3: This LED can be made valid also when "GX Developer connection"
(0 ) is specified in communication protocol setting.
H
QJ71C24N-R2
ERR. RUN
NEU. NEU.
SD CH2 SD
CH1
RD RD
On/flashing
Normal Faulty or reset
Error has
Normal
occurred
Waiting for MC
MC command
command
message being
message to be
received
received
Data being Data not
transmitted transmitted
Data being Data not
received received
Waiting for MC
MC command
command
message being
message to be
received
received
MC command
Data being
message not
transmitted
transmitted
MC command
Data being
message not
received
received
QJ71C24N-R4
ERR.
NEU.
SD CH2
CH1
RD
Off
MC
Valid
Valid
5
RUN ERR.
NEU. NEU.
SD SD CH2
RD RD
Compatible protocol
Non-
Bidirectional
procedural
Valid
Invalid (Off)
Valid
Invalid (Off)
Valid