Appendix A: Special Device List
355
FX3G Series Programmable Controllers
User's Manual - Hardware Edition
21
Memory
Cassette
22
Battery
A
Special Devices
(M8000-,D8000-)
B
Instruction List
Appendix A-1 Special Auxiliary Relay (M8000 to M8511)
*1. Cleared when PLC switches from RUN to STOP or when
RS2 instruction [ch2] is OFF.
*2. Cleared when PLC power supply from OFF to ON.
Number and
name
Operation and function
Correspond-
ing special
device
RS2 (FNC 87) [ch2] and Computer Link [ch2]
[M]8410 to [M]8420 Not used -
[M]8421
*1
RS2 (FNC 87) [ch2] Send wait flag -
M 8422
*1
RS2 (FNC 87) [ch2] Send request D8422
M 8423
*1
RS2 (FNC 87) [ch2]
Receive complete flag
D8423
[M]8424
RS2 (FNC 87) [ch2]
Carrier detection flag
-
[M]8425
RS2 (FNC 87) [ch2]
Data set ready (DSR) flag
-
[M]8426 Computer link [ch2] Global ON
D8427
D8428
D8429
[M]8427
Computer link [ch2]
On-demand send processing
M 8428
Computer link [ch2]
On-demand error flag
M 8429
Computer link [ch2]
On-demand Word/Byte changeover
RS2 (FNC 87) [ch2]
Time-out check flag
Error Detection
[M]8430 to [M]8437 Not used -
M 8438
*2
Serial communication error 2 [ch2] D8438
[M]8439 to [M]8448 Not used -
[M]8449 Special block error flag D8449
[M]8450 to [M]8459 Not used -
Positioning
M 8460 to M8463 Not used -
M 8464
DSZR (FNC150), ZRN (FNC156)
instructions [Y000]
Clear signal device specification
function enabled
D8464
M 8465
DSZR (FNC150), ZRN (FNC156)
instructions [Y001]
Clear signal device specification
function enabled
D8465
M 8466
DSZR (FNC150), ZRN (FNC156)
instructions [Y002]
Clear signal device specification
function enabled
D8466
[M]8467 to [M]8511 Not used -
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