Non Procedure Protocol Led Display Contents - Mitsubishi Electric AJ71QC24 Manual

5. NON PROCEDURE
PROTOCOL COMMUNICATION
MELSEC QnA
5.3 Non Procedure Protocol LED Display Contents
The following shows the display contents of the QC24 LEDs related to non procedure protocol
data communications using the system configuration shown
in
Section 3.1.1.
Error Processing
1
LED Name LED Application ON OFF
RUN QC24 operation status dis.
Play
~~ ~
vlodule normal Module abnor.
mal
3links while com-
nunicating
Abnormal
while stopped)
Lights steadlly
Abnormal
Normal
Check SWO9-SW12.
Check the mode switch setting.
Check the status of the PC CPU and the
Check the mode switch setting.
external device.
CPU
RAW
QC24 and PC CPU commu.
nications status
1 -NEU Check the mode switch setting.
I
1 -C/N
QC24 and PC CPU commu-
nications status display
Check SW07 (enable/disable write during
(RUN)
ibnormal tions normal
1 - P/S Parity error display
Transmission specifications setting and re-
ceive data are not the same.
Make the QC24 transmission specifica-
tions and the external device transmisslor
specifications the same.
Check the transmission specifications
switches.
Transmission specifications and receive dats
are not the same.
Make the QC24 transmission specifica-
tions and the external device specifications
the same.
Check the transmission specifications
switches.
Decrease the transmission rate.
Reduce the number of data sent from the
external device.
1 -SI0 Displays the data send/re-
ceive status.
-SD
.
WAIT
1 -SD
Displays the status of the dats
sent to the external device b)
the QC24.
Displays the status of trans-
mission from QC24 to exter-
nal device.
No send data
If this LED does not blink even though the
external device is sending a command,
check the cable connections.
1 -RD
Displays the status of recep-
tion from external device tc
QC24.
CHI. ERR CHI communications status
display
0
: Normal state.
If an error is generated, the error LED will come
on.
Thereafter, the error LED will remain ON even if the error recovers,
Use the buffer memory (201 H) to turn OFF the error LED.