Siemens Simatic S7 Series System Manual

Libraries
9.2 USS library instructions
S7-200 SMART
System Manual, 09/2015, A5E03822230-AC
427
EEPROM
When the "EEPROM" input is turned on, the instruction writes to both the RAM and the
EEPROM of the drive. When the input is turned off, the instruction writes only to the RAM of
the drive.
NOTICE
Do not exceed the maximum number of write cycles to the EEPROM
When you use an USS_WPM_x instruction to update the parameter set stored in drive
EEPROM, you must ensure that the maximum number of write cycles (approximately
50,000) to the EEPROM is not exceeded.
Exceeding the maximum number of write cycles will result in corruption of the stored data
and subsequent data loss, and possible property damage. The number of read cycles is
unlimited.
Do not exceed the maximum number of write cycles to the EEPROM.
USS_RPM_x and USS_WPM_x example program
Table 9- 17 USS_RPM_x and USS_WPM_x example program
Network 1
Network 1
LD M10.5
= L60.0
LD M10.5
EU
= L63.7
LD L60.0
CALL USS_RPM_W, L63.7, 0, 5, 0, &VB20,
M1.1, VB10, VW12
Network 2
Network 2
LD M10.6
= L60.0
LD M10.6
EU
= L63.7
LDN SM0.0
= L63.6
LD L60.0
CALL USS_WPM_W, L63.7, L63.6, 0, 2000, 0,
50.0, &VB40, M1.2, VB14

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.