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DIGITAL INDUSTRIAL CONTROLLER
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Figure 17: Line of action with reference to the P controller
Functional block 12: Setting the regulated variables
This function block can be used to define the range within which the controlled
variable CO may vary.
Adjustable parameters:
COh: Maximum value of the controlled variable
COl: Minimum value of the controlled variable
For 3-point PWM signals, the heating / cooling range can be limited separately. If the
variable is at a limit value, the integrator circuit will be active.
Chh: Maximum value of the heating variable (Relay 1)
Chl: Minimum value of the heating variable (Relay 1)
Cch: Maximum value of the cooling variable (Relay 2)
Ccl: Minimum value of the cooling variable (Relay 2)
For a 3-point step output without external feedback, the variable limitation is not
available.
Function block 13: Safety value
Here, you specify the controlled variable that is to be output in the event of a
malfunction occurring or if the binary input is activated (when the „Output safety
value“ function is configured; see Section 6.5.4)
Adjustable parameters:
COs: Safety value of the control variable
positiver Wirkungssinn
negativer Wirkungssinn
xd (Regeldifferenz)
Y
0
Negative line of action
PVd (system deviation)
Positive line of action
CO
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