51
(13) Mode setting switch
(14) Computer link LED
Mode settings (factory setting: 0)
Mode Setting Switch Number
Setting
0
Unusable
1
Protocol 1
2
Protocol 2
3
Protocol 3
4
Protocol 4
5
No-protocol or printer function
6 to E
Unusable
F
Used for testing the independent
module
LED No.
Description
0
RUN
Normal run
Normal: ON
Error: OFF
1
SD
Transmitting
Flashes during data transmission
2
RD
Receiving
Flashes during data receive
3
CPU
Communications with programmable controller
CPU
Flashes during communications with
programmable controller CPU
4
NEU
Neutral
Transmission sequence initial state (waiting for
ENQ): ON
ENQ received: OFF
5
ACK
ACK
After sending ACK: ON
After sending NAK: OFF
6
NAK
NAK
After sending NAK: ON
After sending ACK: OFF
7
C/N
Result of programmable controller CPU
communications
Error: ON
Normal: OFF
8
P/S
Parity/Sum check error
Error: ON
Normal: OFF
9
PRO
Protocol error
Communications protocol error: ON
Normal: OFF
10
SIO
SIO error
Normal: OFF
5
D
6
E
7
F
8
0
9
1
B
3
C
4
MODE
2
A
10
9
8
7
6
5
4
3
2
1
0
Summary of Contents for MELSEC-A A1SCPUC24-R2
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