Mitsubishi QJ71C24N User Manual page 319

11 TROUBLESHOOTING
Buffer memory address 201
Buffer memory address 202
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[Displays]
1) H/W LED Information Right side (Left side: CH1 information/
Displays the transmission status and the communications error status
of the Q series C24.
(Displays 201
b15 to
H
For system
1: LED ON, error
0: LED OFF, no error
b15 b14 b13
to
1/0 1/0
H
For system
2) H/W SW Information Parameter
The switch information of the Q series C24 is displayed.
Numbers 1 through 5 correspond to switches 1 through 5 shown in
Section 4.5.2.
(See Section 4.5.2.)
Right side: CH2 information)
/202 of the buffer memory.)
H H
b8 b7 b6 b5 b4 b3
1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0
b8 b7 b6 b5 b4 b3
1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0
MELSEC-Q
b2 b1 b0
(Information of CH1 side)
SD WAIT
SIO
PRO.
P/S
C/N
NAK
ACK.
NEU.
b2 b1 b0
(Information of CH2 side)
SD WAIT
SIO
PRO.
P/S
C/N
NAK
ACK.
NEU.
CH2 ERR.
CH1 ERR.
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