Siemens CSM 1277 Function Manual

Using PID basic functions
7.3 TCONT_CP
PID control
222 Function Manual, 03/2017, A5E35300227-AC
7.3.3
Commissioning TCONT_CP
7.3.3.1
Optimization of TCONT_CP
Application possibilities
The controller optimization for heating or cooling processes from process type I is applicable.
But you can use the block for processes with higher levels like process type II or III.
The PI/PID parameters are automatically determined and set. The controller draft is
designed for an optimal disruption behavior The "precise" parameters resulting from this lead
to overshooting of 10% to 40% of the jump height for setpoint jump heights.
Phases of controller optimization
For the controller optimization, individual phases are run through, which you can read on the
parameter PHASE .
PHASE = 0
No tuning is running. TCONT_CP works in automatic or manual mode.
During PHASE = 0, you can make sure that the controlled system fulfills the requirements for
an optimization.
At the end of the optimization, TCONT_CP changes back into PHASE = 0.
PHASE = 1
TCONT_CP is prepared for optimization. PHASE = 1 may only be started if the requirements
for an optimization are fulfilled.
During PHASE = 1, the following values are determined:
● Process value noise NOISE_PV
● Initial slope PVDT0
● Average of the manipulated variable
● Sampling time PID algorithm CYCLE
● Sampling time pulse generator CYCLE_P

Siemens CSM 1277 Specifications

General

Brand	Siemens
Model	CSM 1277
Category	Controller
Language	English