429
FX
3UC
Series Programmable Controllers
User’s Manual - Hardware Edition
C Operation of Special Devices (M8000 -, D8000 -)
C-1 Special Auxiliary Relay (M8000 to M8511)
11
Mem
ory
Cass
ette/B
attery
12
Te
st
R
un,
M
aint
enanc
e,
Troubleshoot
ing
A
Ve
rs
ion
In
fo
rm
atio
n
B
Per
for
m
ance
Specif
icati
ons
C
S
pec
ia
l D
evices
(M80
00 -,
D
800
0 -)
D
In
str
uct
ion List
E
C
har
ac
te
r-code
F
D
isconti
nued
m
odels
High Speed Counter Up/down Counter Monitoring
[M]8246
C246
When C
of 1-phase
2-input or 2-phase
2-input counter is in down
mode, the corresponding
M8
turns ON.
• ON: Down count operation
• OFF: Up count operation
–
[M]8247
C247
–
[M]8248
C248
–
[M]8249
C249
–
[M]8250
C250
–
[M]8251
C251
–
[M]8252
C252
–
[M]8253
C253
–
[M]8254
C254
–
[M]8255
C255
–
[M]8256 to [M]8259 Not used
–
Analog Special Adapter (Refer to Appendix C-3)
M 8260 to M 8269
1st special adapter
*1*2
–
M 8270 to M 8279 2nd special adapter
*1*2
–
M 8280 to M 8289 3rd special adapter
*1*2
–
M 8290 to M 8299
4th special adapter
*1*2
–
*1. The number of connected FX
3U
-4AD-ADP, FX
3U
-4DA-
ADP, FX
3U
-4AD-TC-ADP and FX
3U
-4AD-PT-ADP units is
counted from the main unit side.
*2. Supported in Ver. 1.20 or later
Flag
[M]8300 to [M]8303 Not used
–
[M]8304
*3
Zero
Turns ON when the multiplication
or division result is 0.
–
[M]8305
Not used
–
[M]8306
*3
Carry
Turns ON when the division result
overflows.
–
[M]8307 to [M]8315 Not used
–
*3. Supported in Ver. 2.30 or later
Unconnected I/O Designation Error and flag
[M]8316
*4
Unconnected I/O designation error
D8316
D8317
[M]8317
Not used
–
[M]8318
*5
BFM initialization failure
ON when a FROM/TO error has
occurred in a special function
block/unit as specified in the BFM
initialization function at changing
PLC from STOP to RUN.
When M8318 turns ON, the unit
number in which the error has
occurred is stored in D8318, and
the BFM number is stored in
D8319.
D8318
D8319
[M]8319 to [M]8327 Not used
–
[M]8328
*5
Instruction non-execution
–
[M]8329
Instruction execution abnormal end
–
*4. If the I/O device numbers are unavailable, M8316 turns
ON when its directly designated to device numbers
including LD, AND, OR, and OUT instructions or indirectly
designated by index.
*5. Supported in Ver. 2.20 or later
Number and
name
Operation and function
Correspond-
ing special
device
Timing Clock and Positioning
[M]8330
*6
DUTY (FNC186) instruction:
Timing clock output 1
D8330
[M]8331
*6
DUTY (FNC186) instruction:
Timing clock output 2
D8331
[M]8332
*6
DUTY (FNC186) instruction:
Timing clock output 3
D8332
[M]8333
*6
DUTY (FNC186) instruction:
Timing clock output 4
D8333
[M]8334
*6
DUTY (FNC186) instruction:
Timing clock output 5
D8334
[M]8335
Not used
–
M 8336
*7*8
DVIT (FNC151) instruction:
Interrupt input specification
function enabled
D8336
[M]8337
Not used
–
M 8338
*6
PLSV (FNC157) instruction:
Acceleration/deceleration
operation
–
[M]8339
Not used
–
[M]8340
[Y000] Pulse output monitor (ON:
BUSY/ OFF: READY)
–
M 8341
*8
[Y000] Clear signal output function
enable
–
M 8342
*8
[Y000] Zero return direction
specification
–
M 8343
[Y000] Forward limit
–
M 8344
[Y000] Reverse limit
–
M 8345
*8
[Y000] DOG signal logic reverse
–
M 8346
*8
[Y000] Zero point signal logic
reverse
–
M 8347
*8
[Y000] Interrupt signal logic
reverse
–
[M]8348
[Y000] Positioning instruction
activation
–
M 8349
*8
[Y000] Pulse output stop command
–
*6. Supported in Ver. 2.20 or later
*7. Supported in Ver. 1.30 or later
*8. Cleared when PLC switches from RUN to STOP.
Number and
name
Operation and function
Correspond-
ing special
device
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