*SETDimmer
channel, valuePurpose | To set channel #channel of the F-series PLC's Light Dimmer Control outputs to fire a trigger
pulse to opto-isolated TRIAC (or Solid State Relay). The trigger pulse is fired after a
time delay specified by the value parameter
(each unit is equal to about 53 microseconds) and it is measured with respect to the zero
crossing that occur at every half cycle of AC voltage.
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Examples | SETDIMMER 1,78 | ||||
Comments: | The PLC light dimmer output channel 1 (which corresponds to digital output #5 of F-series PLC) will send a short trigger pulse to the SSR to turn it on at 78 x (internal timer tick of 53 microsecond per unit) = 0.00413second from the last zero crossing. For a 60Hz AC this will occur at about 90 degree phase angle since the time duration of half a 60Hz wave = 1/60/2 = 0.00833 seconds. |
*{Applicable only to F-series PLC}