Instructions
9.2 PID_3Step
PID control
354 Function Manual, 03/2017, A5E35300227-AC
You must not change tags that are not listed. These are used for internal purposes only.
Table 9- 12 PID_3Step V1 static tags
ActivateRecoverMode BOOL TRUE The ActivateRecoverMode tag (Page 372) determines the reaction
RunModeByStartup BOOL TRUE Activate Mode after CPU restart
If RunModeByStartup = TRUE, the controller returns to the last
active operating mode after a CPU restart.
If RunModeByStartup = FALSE, the controller remains inactive
after a CPU restart.
PhysicalUnit INT 0 Unit of measurement of the process value and setpoint, e.g., ºC, or
PhysicalQuantity INT 0 Physical quantity of the process value and setpoint, e.g., tempera-
ErrorBehaviour INT 0 If ErrorBehaviour = 0 and an error has occurred, the valve stays at
its current position and the controller switches directly to "Inactive"
or "Error monitoring" mode.
If ErrorBehaviour = 1 and an error occurs, the actuator moves to
the substitute output value and only then switches to "Inactive" or
"Error monitoring" mode.
If the following errors occur, you can no longer move the valve to a
configured substitute output value.
• 2000h: Invalid value at Feedback_PER parameter.
• 4000h: Invalid value at Feedback parameter.
• 8000h: Error during digital position feedback.
Warning DWORD DW#16#
0
The Warning tag (Page 361) displays the warnings generated
since a Reset or since the last operating mode switchover.
Cyclic warnings (for example, process value warning) are shown
until the cause of the warning is removed. They are automatically
deleted once their cause has gone. Non-cyclic warnings (for ex-
ample, point of inflection not found) remain and are deleted like
SavePosition REAL 0.0 Substitute output value
If ErrorBehaviour = 1 and an error occurs, the actuator moves to a
safe position for the plant and only then switches to "Inactive"
Currently active setpoint. This value is frozen at the start of tuning.
Progress of tuning as a percentage (0.0 - 100.0)
Config.InputPerOn BOOL TRUE If InputPerOn = TRUE, the Input_PER parameter is used. If Input-
PerOn = FALSE, the Input parameter is used.
Config.OutputPerOn BOOL FALSE If OutputPerOn = TRUE, the Output_PER parameter is used. If
OutputPerOn = FALSE, the Ouput_UP and Output_DN parameters
Config.LoadBackUp BOOL FALSE If LoadBackUp = TRUE,
the last set of PID parameters is reloaded.
The set was saved prior to the last tuning. LoadBackUp is auto-
matically set back to FALSE.
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