Siemens SIMATIC S7-1200 Function Manual page 493

Parameters Address Data type
PVDT0 228.0
PVDT 232.0
PVDT_MAX 236.0
NOI_PVDT 240.0
NOISE_PV 244.0
FIL_CYC 248.0
POI_CMAX 250.0
POI_CYCL 252.0
See also
Operating principle of the pulse generator (Page 481)
Block diagram TCONT_CP (Page 484)
PID control
Function Manual, 03/2017, A5E35300227-AC
Default Description
REAL 0.0 Process value slew rate at start of tuning [1/s]
Sign adapted.
REAL 0.0 Current process value slew rate [1/s]
Sign adapted.
REAL 0.0 Max. change in the process value per second [1/s]
Maximum derivative of the process value at the point of inflection (sign
adapted, always > 0); is used to calculate TU and KIG.
REAL 0.0 Noise action in PVDT_MAX in %
The higher the noise action, the less accurate (less aggressive) the
control parameters.
REAL 0.0 Absolute noise in process value
Difference between maximum and minimum process value in phase 1.
INT 1 Number of cycles of the mean value filter
The process value is determined through FIL_CYC cycles. FIL_CYC is
increased from 1 to a max. of 1024 if needed.
INT 2 Maximum number of cycles after point of inflection
This time is used to find another (i.e. better) inflection point for measur-
ing noise. The tuning is completed only after this time.
INT 0 Number of cycles after inflection point
Instructions
9.4 PID basic functions
493