7 Application examples for configuring the controller
7.2 Working with different setpoints
Manual
196
SIPART DR21
C73000-B7476-C143-08
Example 2
Three-setpoint operation with a slave controller
(see chapter 3.4.3, page 62)
w
E
is an external variable setpoint
SH
safety setpoint fixed by parameterization in oFPA
wi
is an internal setpoint which can be adjusted on the front
The switching between w
E
and SH takes place with the digital signal CB (Internal/External key
(16) must be set to ”External”). The External/Internal key (16) switches between w
E
/SH and wi.
Figure 7-2 shows the setpoint curve with and without setpoint ramp tS.
SH
wi
t
0
w (%)
100
Int
w
E
S 1 = 1
CB on DI1
S 23 = 1
S 25 = 0 (
¸
1)
S 42 = 2
S 43 = 0
S 44 = 1
S 45 = 1
w
E
on AI2
S 17 = 2
Int/Ext key
Int
CB
CB
w
E
Attention!
SH (safety setpoint) can
only be selected based on
w
E
(external setpoint).
Figure 7-2 Setpoint curve according to example 2
Summary of Contents for SIPART DR21
Page 1: ...SIPART DR21 C73000 B7476 C143 08 1 SIPART DR21 6DR 210 Edition 08 2010 Manual ...
Page 2: ...SIPART DR21 C73000 B7476 C143 08 2 ...
Page 148: ...4 Installation 4 2 Electrical Connection Manual 148 SIPART DR21 C73000 B7476 C143 08 ...
Page 180: ...5 Operation 5 5 CPU self diagnostics Manual 180 SIPART DR21 C73000 B7476 C143 08 ...
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