Siemens Simatic S7-1500 - Page 400

Instructions
9.3 PID_Temp
PID control
400 Function Manual, 03/2017, A5E35300227-AC
Tag
Data type
Default
Description
Config.InputUpperLimit REAL 120.0 High limit of the process value
Input and Input_PER are monitored to ensure adherence
to this limit. If the limit is exceeded, an error is output and
the reaction is determined by ActivateRecoverMode.
At the I/O input, the process value can be a maximum of
18% higher than the nominal range (overrange). This
means the limit cannot be exceeded when you use an I/O
input with the pre-setting for high limit and process value
scaling.
When pretuning is started, the difference between high
and low limit of the process value is checked to determine
whether the distance between setpoint and process value
meets the necessary requirements.
InputUpperLimit > InputLowerLimit
Config.InputLowerLimit REAL 0.0 Low limit of the process value
Input and Input_PER are monitored to ensure adherence
to this limit. If the limit is undershot, an error is output and
the reaction is determined by ActivateRecoverMode.
InputLowerLimit < InputUpperLimit
Config.InputUpperWarning REAL 3.402822e+38 Warning high limit of the process value
Input and Input_PER are monitored to ensure adherence
to this limit. If the limit is exceeded, a warning is output at
the Warning parameter.
• If you set InputUpperWarning outside the process
value limits, the configured absolute process value
high limit is used as the warning high limit.
• If you configure InputUpperWarning within the process
value limits, this value is used as the warning high lim-
it.
InputUpperWarning > InputLowerWarning
Config.InputLowerWarning REAL -3.402822e+38 Warning low limit of the process value
Input and Input_PER are monitored to ensure adherence
to this limit. If the limit is undershot, a warning is output at
the Warning parameter.
• If you set InputLowerWarning outside the process
value limits, the configured absolute process value low
limit is used as the warning low limit.
• If you configure InputLowerWarning within the process
value limits, this value is used as the warning low limit.
InputLowerWarning < InputUpperWarning