Pwm Output Function - Toshiba PROSEC T1-16S User Manual

8.7 PWM output function

Function
This function is used to output a variable duty cycle pulse train. The controllable duty
cycle is 0 to 100 % (1 % units).
ON duty
PWM
The PWM output is enabled when the pulse enable flag is ON. While the pulse enable
flag is ON, the duty cycle (ON duty) can be changed by changing the duty setting
value (0 to 100).
The frequency setting is available in the range of 50 to 5000 Hz (1 Hz units) before
turning ON the pulse enable flag. The frequency changing is not allowed while the
pulse enable is ON.
Note that the minimum ON/OFF pulse duration is 100 s. Therefore, the controllable
ON duty range is limited depending on the frequency setting as follows. If the ON duty
setting value is not available (within 0 to 100), the pulse width error flag comes ON.
(PWM output operation is continued but the duty cycle is not guaranteed)
Frequency
50 - 100 Hz
200 Hz
1000 Hz
5000 Hz
Related registers
SW26: Function selection. Refer to section 8.1.
Function
PWM pulse
Pulse enable flag
Frequency setting register
ON duty setting register
Pulse width error flag
ON duty setting error flag
Frequency setting error flag
Note) If the setting value of SW28 or SW29 is out of the allowable range, the
frequency setting error flag (S26F) or the ON duty setting error flag (S26E)
comes ON. (PWM output operation is continued with previous ON duty setting)
50% 70%
T
Cycle time
20 - 10 ms 0 to 100 %
5 ms 0, 2 to 98, 100 %
1 ms 0, 10 to 90, 100 %
0, 50, 100 %
200 s
Register/
device
Y020
S270
SW28
SW29
S26D
S26E
S26F
8. Special I/O Functions
60%
T T
Available ON duty
Remarks
Output is enabled when ON
Data range: 50 to 5000
Data range: 0 to 100
ON at error (reset OFF automatically)
ON at error (reset OFF automatically)
ON at error (reset OFF automatically)
Basic Hardware and Function
6F3B0253
T = Pulse cycle
273