Lenze 8400 - Manual (Page 1412)

18 Function library
18.1 Function blocks | L_SRFG_2
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Lenze · 8400 protec HighLine · Reference manual · DMS 3.0 EN · 03/2013 · TD05
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18.1.165 L_SRFG_2
This FB is a ramp function generator with S-shaped ramps for limiting the temporal rise of analog
signals. The ramps are S-shaped due to trapezoidal acceleration.
• The ramp function generator is provided with a setting function so that a value can directly be
loaded into the internal ramp generator.
• The balanced acceleration/deceleration time is set in C01040 .
• An S-ramp time can be set in C01041 for jerk-free acceleration until maximum acceleration is
reached.
• At the nDeltaOut_a output, the dy/dt slope of the nOut_a output signal is output.
Inputs
Outputs
Parameter
Identifier
Data type
Information/possible settings
nIn_a
INT
Input signal
nSet_a
INT
Starting value for the ramp function generator
• Will be accepted if bLoad = TRUE
bLoad
BOOL
Initialise ramp function generator
FALSE With the set acceleration/deceleration time, the ramp function
generator switches over from the value loaded via nSet_a to the
value at nIn_a.
TRUE At the nOut_a output, nSet_a is output.
• nDeltaOut_a remains at 0 %.
Identifier
Data type
Value/meaning
nOut_a
INT
Output signal
• Internal limitation to ±199 % (100 % ≡ 16384)
nDeltaOut_a
INT
Acceleration of the ramp function generator
• Internal limitation to ±100 % (100 % ≡ 16384)
Parameter Possible settings Info
C01040/2 0.001 s 999.999 Acceleration/Deceleration time
• Initialisation: 100.000 s
C01041/2 0.001 s 50.000 S-ramp time
• Initialisation: 0.200 s
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