I-33
FX Series PLC User's Manual - Data Communication Edition
Remote Maintenance
5 How to Setup Modems on the PLC Side
5.3 Cautions on Use
A
Common Items
B
N:N Network
C
Parallel Link
D
Computer Link
E
Inverter
Communication
F
Non-Protocol
Communication
(RS/RS2 Instruction)
G
Non-Protocol
Communication
(FX
2N
-232IF)
H
Programming
Communication
I
Remote
Maintenance
Apx.
Discontinued
models
4 Inputting "CR" and "LF"
It is necessary to input "CR" and "LF" at the end of the AT command.
Input "000D" and "000A" (hexadecimal values) to data registers respectively.
If "CR (0DH)" and "LF (0AH)" are not input at the end of the AT command, remote maintenance is
disabled.
5.3 Cautions on Use
1. Cautions on inputting the AT command for initialization to the PLC
1) The AT command finishes sending when "0" (hexadecimal value) is read.
2) When creating a sequence program, make sure that the input area for the modem initialization command
is different from the data register area used by general sequence programs.
3) Make sure to input "CR (0DH)" and "LF (0AH)" at the end of the AT command. If they are not input,
remote maintenance is disabled.
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