Siemens Simatic S7 Series System Manual

Open loop motion control
12.11 Understanding the RP Seek modes of the Axis of Motion
S7-200 SMART
564 System Manual, 09/2015, A5E03822230-AC
12.11.1
Selecting the work zone location to eliminate backlash
The following figure shows the work zone in relationship to the reference point (RP), the RPS
Active zone, and the limit switches (LMT+ and LMT-) for an approach direction that
eliminates the backlash. The second part of the illustration places the work zone so that the
backlash is not eliminated. The following figure shows RP seek mode 3. A similar placement
of the work zone is possible, although not recommended, for each of the search sequences
for each of the other RP seek modes.
Selecting the work zone location to eliminate backlash
Backlash is eliminated: RP seek direction: negative and RP approach direction: negative
Backlash is not eliminated: RP seek direction: negative and RP approach direction: negative
①
: Positive motion
② Negative motion

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.