Siemens Simatic S7 Series System Manual

PID loops and tuning
11.7 PID Tune control panel
S7-200 SMART
System Manual, 09/2015, A5E03822230-AC
479
Loop monitoring
After you have completed the auto-tune sequence and have transferred the suggested
tuning parameters to the CPU, you can use the control panel to monitor your loop's response
to a step change in the setpoint.
In the figure below, the loop responds to a setpoint change with the original tuning
parameters (before running auto-tune). Notice the overshoot and the long, damped ringing
behavior of the process using the original tuning parameters.

Siemens Simatic S7 Series Specifications

General

CPU	Varies by model (e.g., S7-300, S7-400, S7-1200, S7-1500)
Communication Interfaces	PROFIBUS, PROFINET, Ethernet, MPI
Programming	TIA Portal, STEP 7
Programming Languages	LAD, FBD, STL, SCL, GRAPH
I/O Modules	Digital, Analog, Specialty modules available
Operating Temperature	0°C to 60°C (standard models)
Mounting	DIN rail mounting
Operating Voltage	24V DC or 120/230V AC (varies by model)
Protection Class	IP20 (standard models)
Memory	Varies depending on the S7 model. Includes work memory (RAM) for program execution, load memory (EEPROM or Flash) for program storage, and system memory for operating system functions. Memory sizes range from kilobytes to megabytes.