Lenze 8400 - Manual (Page 1339)

Lenze · 8400 protec HighLine · Reference manual · DMS 3.0 EN · 03/2013 · TD05
1339
18 Function library
18.1 Function blocks | L_NSet_1
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18.1.117.6 Ramp function generator for the main setpoint
The setpoint is now led via a ramp function generator with linear characteristic. The ramp function
generator converts setpoint step-changes at the input into a ramp.
[18-47] Acceleration and deceleration times
• t
ir
and t
if
are the desired times for changing between w1 and w2.
• S-ramps are possible by selecting S-ramp times.
• The t
ir
/t
if
values are converted into the required Ti times according to the following formula:
Setting and selection of Ti times
Via parameters, you can select 16 different Tir and Tif times each for the ramp function generator.
• The selection is made via the binary coded selection inputs bTI1 ... bTI8:
w1, w2 = change of the main setpoint as a function of t
ir
and t
if
RFG-OUT = output of the ramp function generator
RFG-OUT
100 %
w2
w1
t
0 %
t
ir
t
ir
T
ir
T
ir
Selection inputs Used
Acceleration time
Used
Deceleration
time
bTI8 bTI4 bTI2 bTI1
FALSE FALSE FALSE FALSE C00012 C00013
FALSE FALSE FALSE TRUE C00101/1 C00103/1
FALSE FALSE TRUE FALSE C00101/2 C00103/2
FALSE FALSE TRUE TRUE C00101/3 C00103/3
FALSE TRUE FALSE FALSE C00101/4 C00103/4
FALSE TRUE FALSE TRUE C00101/5 C00103/5
FALSE TRUE TRUE FALSE C00101/6 C00103/6
FALSE TRUE TRUE TRUE C00101/7 C00103/7
TRUE FALSE FALSE FALSE C00101/8 C00103/8
TRUE FALSE FALSE TRUE C00101/9 C00103/9
TRUE FALSE TRUE FALSE C00101/10 C00103/10
TRUE FALSE TRUE TRUE C00101/11 C00103/11
TRUE TRUE FALSE FALSE C00101/12 C00103/12
TRUE TRUE FALSE TRUE C00101/13 C00103/13
TRUE TRUE TRUE FALSE C00101/14 C00103/14
TRUE TRUE TRUE TRUE C00101/15 C00103/15
T
ir
t
ir
100 %
w2 w1 –
----------------------- ⋅ = T
if
t
if
100 %
w2 w1 –
----------------------- ⋅ =