Output Parameters Of Pid_Compact V2 - Siemens SIMATIC S7-1200 Function Manual

9.1.4.4

Output parameters of PID_Compact V2

Table 9- 2 Output parameters of PID_Compact V2
Parameter
ScaledInput
The "Output", "Output_PER", and "Output_PWM" outputs can be used concurrently.
Output
Output_PER
Output_PWM
SetpointLimit_H
SetpointLimit_L
InputWarning_H
InputWarning_L
State
Error
ErrorBits
PID control
Function Manual, 03/2017, A5E35300227-AC
Data type Default
REAL 0.0
REAL 0.0
INT 0
BOOL FALSE
BOOL FALSE
BOOL FALSE
BOOL FALSE
BOOL FALSE
INT 0
BOOL FALSE
DWORD DW#16#0
Description
Scaled process value
Output value in REAL format
Analog output value
Pulse-width-modulated output value
The output value is formed by by variable On and Off
times.
If SetpointLimit_H = TRUE, the absolute setpoint high limit
is reached (Setpoint ≥ Config.SetpointUpperLimit).
The setpoint is limited to Config.SetpointUpperLimit .
If SetpointLimit_L = TRUE, the absolute setpoint low limit
has been reached (Setpoint ≤ Config.SetpointLowerLimit).
The setpoint is limited to Config.SetpointLowerLimit .
If InputWarning_H = TRUE, the process value has reached
or exceeded the warning high limit.
If InputWarning_L = TRUE, the process value has reached
or fallen below the warning low limit.
The State parameter (Page 265) shows the current operat-
ing mode of the PID controller. You can change the operat-
ing mode using the input parameter Mode and a rising
edge at ModeActivate.
State = 0: Inactive
•
State = 1: Pretuning
•
State = 2: Fine tuning
•
State = 3: Automatic mode
•
State = 4: Manual mode
•
State = 5: Substitute output value with error monitoring
•
If Error = TRUE, at least one error message is pending in
this cycle.
The ErrorBits parameter (Page 269) shows which error
messages are pending. ErrorBits is retentive and is reset
upon a rising edge at Reset or ErrorAck.
Instructions
9.1 PID_Compact
253