Siemens Simatic S7 Series System Manual

Program instructions
7.17 Timer
S7-200 SMART
System Manual, 09/2015, A5E03822230-AC
339
Since the timer can be started anywhere within a 100-ms interval, the preset must be set to
one time interval greater than the minimum desired timer interval. For example, to guarantee
a timed interval of at least 2100 ms using a 100-ms timer, the preset time value should be
set to 22.
TON On-delay timer example
LAD
STL
100 ms timer T37 times out after 1 s
(10 x 100 ms)
• I0.0 ON = T37 enabled,
• I0.0 OFF = disable and reset T37
Network 1
LD I0.0
TON T37, +10
T37 bit is controlled by timer T37
Network 2
LD T37
= Q0.0
Timing Diagram

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.