Function block library
7-168
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SHB9300CRV EN 2.0
Priorities:
CINH NSET-LOAD NSET-RFG-0 NSET-RFG-STOP Function
0 0 0 0 RFG follows the input value via the set ramps
0 0 0 1 The value at the ouput of RFG is frozen
0 0 1 0 RFG decelerates to zero along the set deceleration ramp
0 0 1 1
0 1 0 0 RFG accepts the value applied at the input NSET-SET and provides it to its
0 1 0 1
0 1 1 0
0 1 1 1
1 0 0 0 RFG accepts the value applied at the input NSET-CINH-VAL and provides it
1 0 0 1
1 0 1 0
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1
7.6.52.4 S ramp
A PT1 element is connected to the linear ramp generator. This arrangement implements an S ramp
for an almost jerk-free acceleration and deceleration.
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The PT1 element is connected and disconnected by C0134.
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The time constant is set under C0182.
7.6.52.5 Arithmetic operation
Theoutput valueisled toanarithmetic module.Thismodulelinksthemainsetpoint and theadditional
setpoint arithmetically. The arithmetic operation is selected under C0190 (see table below).
C0190 Function Example
0 Output = X (Y is not processed) -
1 Output=X+Y 100 % = 50 % + 50 %
2 Output = X - Y 50 % = 100 % - 50%
3 Output = X *Y 100 % = 100 % *100%
4 Output = X/|Y| 1 % = 100 % / 100%
5 Output = X/(100% - Y) 200 % = 100 % / (100 % - 50 %)
7.6.52.6 Additional setpoint
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An additional setpoint (e.g. a correction signal)can be linked to the main setpoint via the input
NSET-NADD.
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The input signal can be inverted via the input NSET-NADD-INV, before it has an effect on the
ramp generator. The ramp generator has a linear characteristic with one acceleration and one
deceleration time.
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When NSET-LOAD = HIGH the ramp generator is set to zero and held there without
considering the T
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times. The same applies when controller inhibit is set.