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9 COMMUNICATION BETWEEN THE MASTER STATION AND THE
REMOTE I/O STATION
MELSEC-QnA
9.3 Performing the Data Link
Turn on the power supply of the remote I/O station first, then the power supply of the
master station to start the data link.
9.3.1 Confirming the operation by LED display
The following diagram shows the LED display status of the master station and the
remote I/O station when the data link is performed normally.
(1) LED display of the master station
Confirm that the LED display shows the following status:
AJ61QBT11
RUN 156K
ERR. 625K
MST 2.5M
S MST 5M
LOCAL 10M
CPU R/W
SW
M/S TEST
PRM S0
TIME S1
LINE S2
L RUN SD
L ERR. RD
B
R
A
T
E
T
E
S
T
E
R
R
O
R
The transmission speed is set to
2.5Mbps.
Sending data.
Receiving data.
Module is normal.
Set as a master station.
Communicating with programmable
controller CPU.
The data link is proceeding normally.
(2) LED display of the remote I/O station
Confirm that the LED display shows the following status:
PW L RUN SD RD L ERR.
A
J65BTB1-16D
The data link is proceeding normally.
Sending data. Receiving data.24VDC is supplied.