Chapter 5 Instruction Specifications

Notes

If a value other than H01 to H04 is specified as the PWM output number, and if the on-duty value is outside the effective range, DER will be set to “1” and no processing will be performed.

If the external I/O corresponding to the PWM output number is set to a function other than PWM output, DER will be set to “1” and no processing will be performed.

The settings made using the instruction will be reflected in the special internal output (WRF072 to WRF075 and WRF076 to WRF079). However, it is not reflected if DER becomes equal to “1.”

The minimum frequency that can be supported is 10 kHz. If a frequency value smaller than 10 kHz is specified, it will be changed to 10 kHz internally by the system.

The maximum frequency that can be supported is 2 kHz. Do not set to more than 2 kHz. Operation above 2 kHz is not guaranteed.

If the range for S exceeds the valid range of the I/O, DER will be set to “1” and no processing will be performed.

Program example

R8

DIF8

 

 

LD

R8

WR80 = H0100

 

AND

DIF8

 

 

 

 

 

 

 

 

 

WR81 = 2000

 

[

 

 

 

 

 

 

 

 

 

 

 

WR82 = 30

 

WR80 = H100

 

 

 

 

FUN 148 (WR80)

 

WR81 = 2000

 

 

 

 

 

WR82 = 30

 

 

 

 

 

 

 

 

 

 

 

 

FUN

148 ( WR80 )

 

 

 

 

 

]

 

Program description

Sets both the frequency and on-duty value of the PWM output No. 1 (Y100). Sets 2000 (Hz) for the frequency and 30 (%) for the on-duty value.

FUN 148 (s)

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Image 189
Hitachi NJI-350B manual 139