Static Tags Of Pid_Compact V2 - Siemens SIMATIC S7-1200 Function Manual

9.1.4.6

Static tags of PID_Compact V2

You must not change tags that are not listed. These are used for internal purposes only.
Tag
IntegralResetMode
OverwriteInitialOutputValue
RunModeByStartup
LoadBackUp
PhysicalUnit
PhysicalQuantity
ActivateRecoverMode
Warning
Progress
CurrentSetpoint
PID control
Function Manual, 03/2017, A5E35300227-AC
Data type Default
INT Up to V2.2: 1,
V2.3 or high-
er: 4
REAL 0.0
BOOL TRUE
BOOL FALSE
INT 0
INT 0
BOOL TRUE
DWORD 0
REAL 0.0
REAL 0.0
Description
The IntegralResetMode V2 tag (Page 274) determines
how the integral actionPIDCtrl.IntegralSum is pre-
assigned when switching from "Inactive" operating
mode to "Automatic mode". This setting only works for
one cycle.
Options are:
IntegralResetMode = 0: Smooth
•
IntegralResetMode = 1: Delete
•
IntegralResetMode = 2: Hold
•
IntegralResetMode = 3: Pre-assign
•
IntegralResetMode = 4: Like setpoint change (only
•
for PID_Compact with version ≥ 2.3)
If one of the following conditions is met, the integral
action PIDCtrl.IntegralSum is pre-assigned automati-
cally as if Output = OverwriteInitialOutputValue in the
previous cycle:
IntegralResetMode = 3 when switching from "Inac-
•
tive" operating mode to "Automatic mode".
TRUE -> FALSE edge at parameter Reset and
•
parameter Mode = 3
PIDCtrl.PIDInit = TRUE in "Automatic mode"
•
(available as of PID_Compact version 2.3)
Activate operating mode at Mode parameter after CPU
restart
If RunModeByStartup = TRUE, PID_Compact starts in
the operating mode saved in the Mode parameter after
CPU startup.
If RunModeByStartup = FALSE, PID_Compact re-
mains in "Inactive" mode after CPU startup.
If LoadBackUp = TRUE, the last set of PID parameters
is reloaded. The set was saved prior to the last tuning.
LoadBackUp is automatically set back to FALSE.
Unit of measurement of the process value and set-
point, e.g., ºC, or ºF.
Physical quantity of the process value and setpoint,
e.g., temperature.
The Tag ActivateRecoverMode V2 (Page 271) deter-
mines the reaction to error.
Tag Warning V2 (Page 273) shows the warnings since
Reset = TRUE or ErrorAck =TRUE. Warning is reten-
tive.
Progress of tuning as a percentage (0.0 - 100.0)
CurrentSetpoint always displays the current setpoint.
This value is frozen during tuning.
Instructions
9.1 PID_Compact
255