PID Control
PID Control provides a simple PID algorithm that can be used to directly resolve
simple closed-loop control tasks. PID Control can be used to implement
continuous closed-loop controllers, step controllers or pulse controller/pulse
shapers.
PID Control with S7-200
The actual controller blocks are integrated into the operating system of the CPU
22x. The STEP 7 Micro/WIN programming software offers a wizard for simple
parameterization of this controller. In addition, STEP 7 Micro/WIN contains a
control panel to graphically display the control loops. One PID controller can
be manually adapted or automatically optimized at a time..
PID Control with S7-300/400
The standard function blocks for the different controller functions are provided
in the libraries of STEP 7 and CFC and are loaded into the CPUs. The compact
CPUs 313C and 314C are already available as SFBs in the operating system and do
not occupy any user memory. The controllers are parameterized in STEP 7 using a
table. The number of controllers that can be implemented depends on the
available memory space and the resulting overall runtime
|
Technical publication "Controlling with SIMATIC" 
Pre sales info