Siemens SIMATIC S7-1200

Technology instructions
10.2 PID control
S7-1200 Programmable controller
System Manual, V4.2, 09/2016, A5E02486680-AK
625
10.2.6
Configuring the PID_Temp controller
The parameters of the technology object determine the operation of the PID contro
l-
ler. Use the icon to open the configuration editor.
Table 10- 32 Example configuration settings for the PID_Temp instruction
Settings
Description
Basic
Controller type
Selects the engineering units.
Activate mode
after CPU restart
Restarts the PID loop after it is reset or if an input limit has been
exceeded and returned to the valid range.
Set Mode to: Defines the mode that the user wants the PID to go to
after restart.
Input Selects either the Input parameter or the Input_PER parameter (for
analog) for the process value. Input_PER can come directly from an
analog input module.
Output Heat Selects either to use the digital outputs (OutputHeat and Out-
putHeat_PWM) or to use the analog output (OutputHeat_PER (ana-
log)) for the output value.
Output Cool Selects either to use the digital outputs (OutputCool and Out-
putCool_PWM) or to use the analog output (OutputCool_PER (ana-
log)) for the output value.
Process
value
Scales both the range and the limits for the process value. If the process value goes be-
low the low limit or above the high limit, the PID loop goes to inactive mode and sets the
output value to 0.
To use Input_PER, you must scale the analog process value (input value).
Cascade Controller is mas-
ter
Sets the controller as a master and selects the number of slaves.
Controller is slave
Sets the controller as a slave and selects the number of masters.