DC541_DAMPENER¶
| Parameter | Value |
|---|---|
| Library_File_Name | DC541_DAMPENER_AC500_V13.lib |
| Firmware | V1.12 |
| Type | Type_Function_Block_History |
| Available as of PLC runtime system | V1.3 |
The Function Block DC541_DAMPENER transfers all values to control the DAMPENER functionality for DC541 device.
The Dampener-Mode is a modified PWM-Mode. If the device is configured as DAMPENER, all 8 outputs are controlled by the DAMPENER functionality.
All 8 outputs are switched on/off with the same frequency, but use a different time to switch on a a different duration for being on. These values are specified by Function Block DC541_DAMPENER with input parameters LIM_MINx and ON_DURx.
The following rule has to be applied:
- LIM_MINx < PERIOD
- ON_DURx < PERIOD
All input parameters can be continuously modified, the values are accepted immediately. The following values are specified:
- Length for a single pulse PULSE_WIDTH in microseconds from 100 to 65535
- Number of pulses for a complete period: PERIOD 100 to 65535, every pulse as a PULSE_WITDH length
The resulting frequency is then calculated as:
f = 1/ (PULSE_WIDTH*PERIOD) with a range from 1/ (100*100µs) = 100 Hz to 1/(65535*65535µs) = 0.00023 Hz
The device uses an internal counter with a clock PULSE_WIDTH µs which counts from 0 to PERIOD.
When the condition LIM_MINx = counter is reached, the output is switched on for ON_DURx pulses.
In addition, it is possible to leave out up to 255 periods for a certain output by using SKIP_PULSx input parameter.
The following example shows the different result with SKIP_PULS=0 and SKIP_PULS=1 and otherwise identical values.
SKIP_PULSE