Mitsubishi Electric MELSEC Q Series Reference Manual page 150

(1) Indicator LEDs
QJ71GP21-SX
Q J 7 1 G P 2 1 - S X
S
1 1 1
T.
N
2 2
O.
4 4
8 8
X 100 10 1
Name
RUN
MODE
PRM
D LINK
ERR.
SD
RD
1×100
1,2,4,8×10
1,2,4,8×1
EXT.PW
*1 When the CPU module is reset, the LEDs other than the EXT.PW LED turn OFF.
148
Q J 7 1 G P 2 1 S - S X
RUN PRM
MODE D LINK
SD RD
ERR.
*1
LED status
ON, green
OFF
ON, green
Flashing, green
OFF
ON, green
OFF
ON, green
Flashing, green
OFF
ON, red
OFF
ON, green
OFF
ON, green
OFF
ON, green (Numeric
display)
OFF
ON, green
OFF
QJ71GP21S-SX
EXT.PW
Operating normally
Hardware fault or watchdog timer error
Online mode
Test mode
Offline mode
Operating as a Control station
Operating as a Normal station
Data link in operation (Cyclic transmission operated)
Data link in operation (Cyclic transmission stopped)
Data link not in operation (Disconnected from network)
• 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.
Normal status
Sending data
Not sending data
Receiving data
Not receiving data
The station No. is set. (
No station No. is set.
External power supplied (Own station power status (SB0042) is ON.)
External power not supplied (Own station power status (SB0042) is OFF.)
S
1 1 1 RUN PRM
T.
N
2 2 MODE D LINK
O.
4 4 SD RD
8 8
ERR.
X 100 10 1
Description
Page 149, Section 5.3 (2))