Siemens Simatic S7 Series User Manual

54
SIMATIC Retentive On-Delay The
SIMATIC Retentive On-Delay Timer (TONR) functions in
Timer (TONR) a similar manner to the On-Delay Timer (TON). Just like the On-
Delay timer (TON), the Retentive On-Delay Timer (TONR) times
when the enabling input (IN) is on. However, the Retentive On-
Delay Timer (TONR) does not reset when the input (IN) turns off.
Instead, the timer must be reset with a Reset (R) instruction.
The following example shows a Retentive On-Delay timer
(TONR) with a resolution of 100 ms and preset value of 150 (15
seconds). When input I0.3 turns on, I0.3 contact closes, and
timer T5 begins timing. If, for example, after 10 seconds input
I0.3 turns off, the timer stops. When input I0.3 turns on again,
the timer begins timing at 10 seconds. Timer bit T5 turns on 5
seconds after input I0.3 closes for the second time. When timer
bit T5 turns on, contact T5 closes, and output Q0.1 turns on.
The Reset (R) function, shown in network 1, is necessary to
reset the accumulated time of the Retentive On-delay Timer
(TONR) to zero. In this example, the Reset (R) function turns on
and resets the timer when contact I0.2 closes. This causes the
T5 contact to open and output Q0.1 to turn off.
T5
T5
I0.3
I0.2
Q0.1
R
TONR
T5
IN
PT
100 ms
+150
Network 1
Network 2
Network 3
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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.