Input Parameters Tcont_Cp - Siemens SIMATIC S7-1200 Function Manual

Instructions
9.4 PID basic functions
9.4.4.5

Input parameters TCONT_CP

Table 9- 19 Input parameters TCONT_CP
Parameters Address
PV_IN 0.0
PV_PER 4.0
DISV 6.0
INT_HPOS 10.0
INT_HNEG 10.1
SELECT 12.0
See also
Operating principle of the pulse generator (Page 481)
Block diagram TCONT_CP (Page 484)
486
Data Default Description
type
REAL 0.0 At the "Process value input" you can assign parameters to a commis-
sioning value or you can interconnect an external process value in float-
ing-point format. The valid values depend on the sensors used.
INT 0 The process value in I/O format is interconnected with the controller at
the "Process value I/O" input.
REAL 0.0 For feedforward control, the disturbance variable is interconnected to the
"Disturbance variable" input.
BOOL FALSE The output of the integral action can be held in the positive direction. For
this, the input INT_HPOS must be set to TRUE. In a cascade control,
INT_HPOS of the primary controller is connected to QLMN_HLM of the
secondary controller.
BOOL FALSE The output of the integral action can be held in the negative direction.
For this, the input INT_HNEG must be set to TRUE. In a cascade con-
trol, INT_HNEG of the primary controller is connected to QLMN_LLM of
the secondary controller.
INT 0 If the pulse shaper is on, there are several ways of calling the PID algo-
rithm and pulse shaper:
•
•
•
•
SELECT = 0: The controller is called in a fast cyclic interrupt priority
class and the PID algorithm and pulse shaper are processed.
SELECT = 1: The controller is called in OB1 and only the PID algo-
rithm is processed.
SELECT = 2: The controller is called in a fast cyclic interrupt priority
class and only the pulse shaper is processed.
SELECT = 3: The controller is called a slow cyclic interrupt priority
class and only the PID algorithm is processed.
Function Manual, 03/2017, A5E35300227-AC
PID control