Siemens SIMATIC S7-1500T Function Manual

Using PID_3Step
5.2 PID_3Step V2
PID control
Function Manual, 03/2017, A5E35300227-AC
123
PID_3Step generates a programmable output value in the case of an error:
● Current value
PID_3Step is switched off and no longer modifies the actuator position.
● Current value for error while error is pending
The controller functions of PID_3Step are switched off and the position of the actuator is
no longer changed.
If the following errors occur in automatic mode, PID_3Step returns to automatic mode as
soon as the errors are no longer pending.
– 0002h: Invalid value at Input_PER parameter.
– 0200h: Invalid value at Input parameter.
– 0400h: Calculation of output value failed.
– 1000h: Invalid value at Setpoint parameter.
– 2000h: Invalid value at Feedback_PER parameter.
– 4000h: Invalid value at Feedback parameter.
– 8000h: Error during digital position feedback.
– 20000h: Invalid value at SavePosition tag.
If one or more of the following errors occur, PID_3Step stays in
automatic mode:
– 0001h: The Input parameter is outside the process value limits.
– 0800h: Sampling time error
– 40000h: Invalid value at Disturbance parameter.
PID_3Step remains in manual mode if an error occurs in manual mode.
If an error occurs during tuning or transition time measurement, PID_3Step switches to
the mode in which tuning or transition time measurement was started. Only in the event
of the following error is tuning not aborted:
– 0020h: Pretuning is not permitted during fine tuning.
● Substitute output value
PID_3Step moves the actuator to the substitute output value and then switches off.
● Substitute output value while error is pending
PID_3Step moves the actuator to the substitute output value. When the substitute output
value is reached, PID_3Step reacts as it does with "Current value for while error is
pending".
Enter the substitute output value in "%".
Only substitute output values 0% and 100% can be approached precisely in the case of
actuators without analog position feedback. A substitute output value not equal to 0% or
100% is approached via an internally simulated position feedback. This procedure does not,
however, allow the exact approach of substitute output value.
All substitute output values can be approached precisely with actuators with analog position
feedback.

Siemens SIMATIC S7-1500T Specifications

General

Brand	Siemens
Model	SIMATIC S7-1500T
Category	Controller
Language	English