Mitsubishi Electric MELSEC FX3U Programming Manual page 400

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
4) When special high speed output adapters are connected, the same output numbers in the main unit are
assigned as shown in the table below.
Only wire the appropriate output terminals.
Outputs in special high speed output adapters and the main unit operate as shown below.
Assignment of output numbers in special high speed output adapters
Setting status of output
form setting switch
"FP RP" side
"PLS DIR" side
Output operation
Relay output type main unit
Special high speed output adapter
Transistor output type main unit
Program example
When the contents of D10 are changed in the range from "0" to "50" in the program example shown below,
the average output from Y000 will be in the range from 0 to 100%.
In this program example the FX
following manual.
X0
FNC 58
Example of smoothing circuit
0V 24V
Y000
COM1
R > P
τ = P(kΩ) C(µF) = 470ms >> T
The time constant of the filter should be considerably larger than the pulse cycle T
The ripple value "∆e" in the mean output current "e" is approximately "∆e/e ≤ T
398
Signal name
Forward rotation
pulse chain (FP)
Reverse rotation
pulse chain (RP)
Pulse chain
Direction
series main unit (sink output) is used. For wiring details, refer to the
3U
D10 K50
PWM
510Ω
PLC
12V
Y001 Y002 Y003
0
13 High Speed Processing – FNC 50 to FNC 59
Setting name in each
positioning instruction
Pulse output destination
Rotation direction signal
Pulse output destination
Rotation direction signal
Do not use the PWM (FNC 58) instruction with relay-output type main units.
(Considerable output response delay may be generated, chattering may occur
in contacts, or the contact life may be shortened.)
Set the output frequency to "200kHz" or less.
Use a transistor output type main unit.
Set the output frequency to "100kHz" or less.
Y000
Y000
1kΩ
5V P
1kΩ
22Ω
1kΩ
1kΩ
13.9 FNC 58 – PWM / Pulse Width Modulation
Output number
1st unit
1st axis 2nd axis 3rd axis 4th axis
Y000 Y001
Y004 Y005
Y000 Y001
Y004 Y005
Output operation
→ FX
Hardware Edition
3G
→ FX
Hardware Edition
3U
→ FX
Hardware Edition
3UC
D10
50ms
R
(1kΩ)
+
E
e
C
470µF
.
0
/τ"
0
2nd unit
Y002 Y003
Y006 Y007
Y002 Y003
Y006 Y007
10V
V