Output Parameters Of Pid_Temp - Siemens SIMATIC S7-1200 Function Manual

9.3.4.4

Output parameters of PID_Temp

Parameter Data type Default
ScaledInput REAL
OutputHeat REAL
OutputCool REAL
OutputHeat INT
_PER
OutputCool INT
_PER
OutputHeat BOOL
_PWM
OutputCool BOOL
_PWM
SetpointLimit BOOL
_H
PID control
Function Manual, 03/2017, A5E35300227-AC
Description
0.0 Scaled process value
0.0 Output value (heating) in REAL format
The PID output value (PidOutputSum) is scaled with the two value pairs
Config.Output.Heat.PidUpperLimit, Config.Output.Heat.UpperScaling and
Config.Output.Heat.PidLowerLimit, Config.Output.Heat.LowerScaling and
output in REAL format at OutputHeat.
OutputHeat is always calculated.
0.0 Output value (cooling) in REAL format
The PID output value (PidOutputSum) is scaled with the two value pairs
Config.Output.Cool.PidUpperLimit, Config.Output.Cool.LowerScaling and
Config.Output.Cool.PidLowerLimit, Config.Output.Cool.UpperScaling and
output in REAL format at OutputCool.
OutputCool is only calculated if the cooling output is activated (Con-
fig.ActivateCooling = TRUE).
0 Analog output value (heating)
The PID output value (PidOutputSum) is scaled with the two value pairs
Config.Output.Heat.PidUpperLimit, Config.Output.Heat.PerUpperScaling and
Config.Output.Heat.PidLowerLimit, Config.Output.Heat.PerLowerScaling and
output as analog value at OutputHeat_PER.
OutputHeat_PER is only calculated if Config.Output.Heat.Select = 2.
0 Analog output value (cooling)
The PID output value (PidOutputSum) is scaled with the two value pairs
Config.Output.Cool.PidUpperLimit, Config.Output.Cool.PerLowerScaling and
Config.Output.Cool.PidLowerLimit, Config.Output.Cool.PerUpperScaling and
output as analog value at OutputCool_PER.
OutputCool_PER is only calculated if the cooling output is activated (Con-
fig.ActivateCooling = TRUE) and Config.Output.Cool.Select = 2.
FALSE Pulse-width modulated output value (heating)
The PID output value (PidOutputSum) is scaled with the two value pairs
Config.Output.Heat.PidUpperLimit, Config.Output.Heat.PwmUpperScaling
and Config.Output.Heat.PidLowerLimit, Con-
fig.Output.Heat.PwmLowerScaling and output as pulse-width modulated
value (variable switch on and switch off times) at OutputHeat_PWM.
OutputHeat_PWM is only calculated if Config.Output.Heat.Select = 1.
FALSE Pulse-width modulated output value (cooling)
The PID output value (PidOutputSum) is scaled with the two value pairs
Config.Output.Cool.PidUpperLimit, Config.Output.Cool.PwmLowerScaling
and Config.Output.Cool.PidLowerLimit, Con-
fig.Output.Cool.PwmUpperScaling and output as pulse-width modulated
value (variable switch on and switch off times) at OutputCool_PWM.
OutputCool_PWM is only calculated if the cooling output is activated (Con-
fig.ActivateCooling = TRUE) and Config.Output.Cool.Select = 1.
FALSE If SetpointLimit_H = TRUE, the absolute setpoint high limit is reached (Set-
point ≥ Config.SetpointUpperLimit) or Setpoint ≥ Config.InputUpperLimit.
The setpoint high limit is the minimum of Config.SetpointUpperLimit and
Config.InputUpperLimit.
Instructions
9.3 PID_Temp
391