Using the ratio factor RATIOFAC, the ratio of the duration of positive to negative pulses
can be changed. In a thermal process, for example, this would allow different system time
constants for heating and cooling. The ratio factor also influences the minimum pulse or
minimum break time. A ratio factor < 1 means that the threshold value for negative pulses
is multiplied by the ratio factor.
n Ratio Factor < 1
The pulse duration at the negative pulse output calculated from the input variable
multiplied by the period time is reduced by the ratio factor.
Three-Step Control Asym-
metrical
VIPA SPEED7
Standard
PID Control > FB 43 - PULSGEN - Pulse generation
HB00 | OPL_SP7 | Operation list | en | 18-30 852
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