Total Solution for Industrial Automation
17
PWM Output Module User’s manual
4.4.1
Frequency ramp control (Buffer memory Offset 5 ~ 7)
If frequency ramp control time is configured prior to a change in frequency value,
any change in pulse frequency will be applied gradually. Frequency ramp control
time can be operated by using TO instruction on buffer memory Offset 5 ~ 7.
If frequency ramp control time is changed during ramp operation, the change will
be applied not to the current operation, but to the next operation.
In case of power reset or CPU STOP, enter the value again by using TO instruction
as all value of buffer memory will be set back to initial value(0).
When M00 turns on, operate as below:
a)
Input the frequency ramp control time value 300(3seconds) to buffer memory
Offset 5 by using TO instruction.
b)
Now, if 1000pps is entered into the buffer memory Offset 1, the new frequency
value will be introduced gradually over 3 seconds.
Note: Please perform step a) before step b).
Example 2: Frequency Ramp Control