Mitsubishi Electronics FX3G User Manual
377
FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
Series
Programming Manual - Basic & Applied Instruction Edition
13 High-Speed Processing – FNC 50 to FNC 59
13.8 FNC 57 – PLSY / Pulse Y Output
11
FN
C30
-FN
C3
C30
-FN
C3
9
R
ota
tion and
Shi
ft
ft
12
FN
C40-FN
C40-FN
C49
D
ata O
perati
perati
on
13
FNC
50-FNC
59
High-Speed
Proc
essing
14
FM
C60-FN
C60-FN
C69
H
andy
In
struction
15
FN
C70-FN
C70-FN
C79
E
xternal
F
X
I/O
De
vice
16
FNC
80-FNC
89
External
FX
Dev
ice
ice
17
FNC1
00-
FNC10
00-
FNC10
9
Dat
a
a
Transfer 2
18
FNC1
10-
FNC139
FNC139
Fl
oati
ng Poi
nt
19
FNC14
0-F
N
C
149
Da
ta
Operation 2
20
FNC1
50-
FNC159
FNC159
Pos
itioning
itioning
Control
2. Monitoring the current number of generated pulses
The number of pulses output from Y000 or Y001 is stored in the following special data registers:
The contents of each data register can be cleared using the following program:
3. How to stop the pulse output
• When the command input is set to OFF, the pulse generation is immediately stopped. When the command input is
set to ON again, pulse generation operation restarts from the beginning.
• When the special auxiliary relays (M) shown below are set to ON, the pulse output is stopped.
To restart pulse output, set the device (FX
3S
/FX
3G
/FX
3GC
: M8145, M8146, M8349, M8359
FX
3U
/FX
3UC
: M8349, M8359) corresponding to the output signal to OFF, and then drive the pulse output instruction
again.
Cautions
1. When a word device is specified as
or
When the value of the word device is changed while the instruction is executed, the following operation results:
• When the data in
is changed, the output frequency changes accordingly.
• When the data in
is changed, the change (new value) becomes valid the next time the instruction is driven.
2. Frequency
When using transistor outputs in the main unit, set the output frequency
to "100,000 Hz" or less.
If the load is operated using pulses at a frequency higher than 100,000 Hz, the PLC may be damaged.
Do not set the output frequency to "0".
Do not set the output frequency to "0".
3. Pulse output
• Only a transistor output on the main unit or Y000 or Y001 on a special high-speed output adapter
*1
can be specified
in .
When using the PLSY (FNC 57) instruction with a relay output type or triac output type FX
When using the PLSY (FNC 57) instruction with a relay output type or triac output type FX
3U
PLC, a special high-
speed output adapter is required.
*1.
High-speed output special adapters can be connected only to FX
3U
PLC.
• The duty cycle of the pulse ON/OFF time is 50 % inside the PLC.
However, 50 % may not be output depending on the frequency due to the effect of the output circuit.
• The pulse output is controlled by the dedicated hardware not affected by the sequence program (operation cycle).
• If the command input is set to OFF during continuous pulse output, the output from
turns OFF.
Device
Description
Contents of data
High
order
Low
order
D8141
D8140
Accumulated number of pulses
output from Y000
output from Y000
Accumulated number of pulses output from Y000 by PLSY and PLSR
instructions
instructions
D8143
D8142
Accumulated number of pulses
output from Y001
output from Y001
Accumulated number of pulses output from Y001 by PLSY and PLSR
instructions
instructions
D8137
D8136
Total accumulated number of
pulses output from Y000 and Y001
pulses output from Y000 and Y001
Total accumulated number of pulses output from Y000 and Y001 by PLSY and
PLSR instructions
PLSR instructions
Device
Description
FX
3S
/FX
3G
/FX
3GC
FX
3U
/FX
3UC
M8145, M8349
M8349
Immediately stops pulse output from Y000.
M8146, M8359
M8359
Immediately stops pulse output from Y001.
FNC 12
DMOV
K0
Low-order device shown in
table above
Command
input
S
1
S
2
S
1
S
2
S
1
S
1
D
D