Siemens Simatic S7 Series System Manual

S7-200 SMART
System Manual, 09/2015, A5E03822230-AC
411
Libraries
9
9.1
Creating a user-defined library of instructions
STEP 7-Micro/WIN SMART allows you either to create a custom library of instructions, or to
use a library created by someone else.
Creating a library
To create a user-defined library of instructions, you create standard
STEP 7-Micro/WIN SMART subroutines and group them together. By grouping these
subroutines into a library, you can hide the code to prevent unwanted changes and to protect
the technology (know-how) of the author.
To create a user-defined library, perform the following tasks:
1. Write the program as a standard project and put the function to be included in the library
into subroutines.
2. Ensure that you have assigned a symbolic name to all V memory locations in the
subroutines or interrupt routines. To minimize the amount of V memory that the library
requires, use sequential V memory locations.
3. Rename the subroutines to the names that you want to appear in the instruction library.
4. Click the Create button
from the Libraries area of the File menu ribbon strip to
compile and create the new library from the subroutines you selected. If the subroutine
references interrupts, STEP 7-Micro/WIN SMART also includes the interrupt routines in
the library.

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.