User guide

5 Function blocks
5.133 L_SdRampGenerator - ramp function generator - S-ramp
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Lenze · 9400 function library · Reference manual · DMS 6.7 EN · 08/2014 · TD05
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5.133 L_SdRampGenerator - ramp function generator - S-ramp
This FB is a ramp function generator with S-shaped ramps for limiting the increase of analog signals
over time. The S-shape of the ramps results from a trapezoidal acceleration.
• The ramp function generator has a setting function for directly loading the value into the inter-
nal ramp generator.
• The acceleration/deceleration times are set via C04340.
• An S-ramp time for a jerk-free acceleration can be set in C04341.
• At the output dnDeltaOut_n the gradient dy/dt of the output signals dnOut_n is shown. This si-
gnal can for instance be used for torque feedforward control after a gain via the L_TbGainLim
FB.
• An advanced version, the L_SdRampGeneratorAny
FB, is available from library V02.09.xx.xx.
This FB can be used to also process speeds (_s) and to set separate acceleration and deceleration
times.
Inputs
Outputs
Function library: LenzeServoDrive
Runtime software licence:  Motion Control HighLevel  Motion Control TopLevel
Identifier/data type Information/possible settings
dnIn_n
DINT
Scaled input signal
bLoadStartValue
BOOL
Initialising ramp function generator
FALSE The ramp function generator runs with the Ti times set from the va-
lue loaded via dnStartValue_n to the value at dnIn_n.
TRUE At the output dnOut_n dnStartValue_n is output, dnDeltaOut_n re-
mains on 0 %.
dnStartValue_n
DINT
Scaled starting value for the ramp function generator
• Acceptance when bLoadStartValue = TRUE
Identifier/data type Value/meaning
dnOut_n
DINT
Scaled output signal
• Internally limited to ±200 %
dnDeltaOut_n
DINT
Scaled acceleration of the ramp function generator
• Time reference: 62.5 μs, i. e. 0.01 % correspond to a change of 160 % in the output
signal within 1 s.
• Internally limited to ±200 %
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