Mitsubishi Electronics FX3G User Manual

Page of 964
381
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
13.9 FNC 58 – PWM / Pulse Width Modulation
11
FN
C30
-FN
C3
9
R
ota
tion and 
Shi
ft
12
FN
C40-FN
C49
D
ata O
perati
on
13
FNC
50-FNC
59
High-Speed
 
Proc
essing
14
FM
C60-FN
C69
H
andy 
In
struction
15
FN
C70-FN
C79
E
xternal
 F
X
 I/O
 
De
vice
16
FNC
80-FNC
89
External
 FX 
Dev
ice
17
FNC1
00-
FNC10
9
Dat
Transfer 2
18
FNC1
10-
FNC139
Fl
oati
ng Poi
nt
19
FNC14
0-F
N
C
149
Da
ta
 
Operation 2
20
FNC1
50-
FNC159
Pos
itioning 
Control
Cautions
1. Setting the pulse width and period 
Make sure that the pulse width 
 and period 
 satisfy the relationship "
 
≤ ".
2. Pulse output
• Only the following outputs can be specified in 
 according to the system configuration.
- When using special high-speed output adapters
*1
: Y000, Y001, Y002
*2
, or Y003
*2
- When transistor outputs in the main unit are used: Y000, Y001, or Y002
*3
*1.
High-speed output special adapters can be connected only to FX
3U
 PLC.
Use a transistor output type PLC.
*2.
When specifying Y002 or Y003 on a special high-speed output adapter, a second special high-speed output
adapter is required.
*3.
Y002 is not available in FX
3G
 PLC (14-point and 24-point type) and FX
3S
/FX
3GC
 PLCs.
• The pulse output is controlled by interrupt processing not affected by the sequence program (operation cycle).
• If the command input is set to OFF, the output from 
 turns OFF.
• While a pulse output monitor (BUSY/READY) flag is ON, a pulse output or positioning instruction for the same 
output relay cannot be executed.
While a pulse output monitor flag is ON even after the instruction drive contact is set to OFF, a pulse output or 
positioning instruction for the same output relay cannot be executed.
Before executing a pulse output or positioning instruction, wait until the pulse output monitor flag turns OFF and 
one or more operation cycles pass.
3. Cautions on using special high-speed output adapters
1) Outputs of special high-speed output adapters work as differential line drivers.
2) Set the pulse output type setting switch of a special high-speed output adapter to the "pulse chain + direction"
(PLS DIR) side.
If the switch is set to the "forward rotation pulse chain reverse rotation pulse chain" (FP RP) side, normal
operations are not possible. The pulse output destination changes depending on the output status as shown in the
table below.
3) Set the pulse output type setting switch while the PLC is stopped or while the power is OFF.
Do not adjust the pulse output type setting switch while pulses are being output.
Pulse output destination device
Pulse output monitor flag
Y000
M8340
Y001
M8350
Y002
M8360
Y003
M8370
Pulse output 
destination
Output affecting 
operation
Operation
 = 
Y000
Y004
While Y004 is ON, pulses are output from Y000 on the high-speed output adapter.
While Y004 is OFF, pulses are output from Y004 on the high-speed output adapter.
 = 
Y001
Y005
While Y005 is ON, pulses are output from Y001 on the high-speed output adapter.
While Y005 is OFF, pulses are output from Y005 on the high-speed output adapter.
 = 
Y002
Y006
While Y006 is ON, pulses are output from Y002 on the high-speed output adapter.
While Y006 is OFF, pulses are output from Y006 on the high-speed output adapter.
 = 
Y003
Y007
While Y007 is ON, pulses are output from Y003 on the high-speed output adapter.
While Y007 is OFF, pulses are output from Y007 on the high-speed output adapter.
  
S
1
  
S
2
  
S
1
  
S
2
   
D
   
D
  D
  D
  D
  D