Mitsubishi Electric MELSEC-Q Series - Page 150

148
(1) Indicator LEDs
*1 When the CPU module is reset, the LEDs other than the EXT.PW LED turn OFF.
Name
LED status
*1
Description
RUN
ON, green Operating normally
OFF Hardware fault or watchdog timer error
MODE
ON, green Online mode
Flashing, green Test mode
OFF Offline mode
PRM
ON, green Operating as a Control station
OFF Operating as a Normal station
D LINK
ON, green Data link in operation (Cyclic transmission operated)
Flashing, green Data link in operation (Cyclic transmission stopped)
OFF Data link not in operation (Disconnected from network)
ERR.
ON, red
• Received data are erroneous. (Receive frame error)
• A frame error above a certain level has occurred between stations.
• The Control station or a station number is duplicated.
• Cable disconnection, or incorrect cable connection between OUT and IN
• Network parameters are corrupted, or some settings (Reserved station
specification, Total number of stations, Network No, etc.) are inconsistent
between the Control and Normal stations.
OFF Normal status
SD
ON, green Sending data
OFF Not sending data
RD
ON, green Receiving data
OFF Not receiving data
1×100
1,2,4,8×10
1,2,4,8×1
ON, green (Numeric
display)
The station No. is set. ( Page 149, Section 5.3 (2))
OFF No station No. is set.
EXT.PW
ON, green External power supplied (Own station power status (SB0042) is ON.)
OFF External power not supplied (Own station power status (SB0042) is OFF.)
RUN
MODE
SD
ERR.
PRM
D LINK
RD
110100
X
S
T.
N
O.
QJ71GP21-SX
1
2
4
8
11
2
4
8
EXT.PW
QJ71GP21S-SX
RUN
MODE
SD
ERR.
PRM
D LINK
RD
110100
X
S
T.
N
O.
1
2
4
8
11
2
4
8
QJ71GP21S-SXQJ71GP21-SX