Lenze 8400 TopLine - Manual (Page 1611)

Lenze · 8400 TopLine · Reference manual · DMS 6.0 EN · 06/2014 · TD05/TD14
1611
19 Function library
19.1 Function blocks
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
19.1.138.4 Evaluation of the output signal
After the limitation, the output signal is evaluated with the influencing factor nInfluence_a. The
evaluation is activated/suppressed along a ramp when the bEnableInfluenceRamp input is set to
TRUE. The ramp times are set with the parameters "Influence acceleration time" ( C00243 ) and
"Influence deceleration time" ( C00244 ).
19.1.138.5 Comparison function "Actual value = setpoint"
If setpoint and actual value are identical and there is no system deviation, the bSetEqAct status
output is set to TRUE.
• The hysteresis of the comparison function has a fixed value of 1 %.
• The symmetrical window around the setpoint for the comparison function can be set in
C00247
(Lenze setting: 2 %).
[19-61] Comparison function: Switching performance
[19-62] Comparison function: Example
 Hysteresis (1 %, fixed value)
 C00247 : Window
TRUE
FALSE
bSetEqAct
Set value Act value
Œ  Œ 
 Hysteresis (1 %, fixed value)
 C00247 : Window
Act value
Set value
TRUE
FALSE
bSetEqAct
t
t
Œ


Œ