Siemens SIMATIC S7-1200 - 9.8.4 Configuring a pulse channel for PWM or PTO

Extended instructions
9.8 Pulse
S7-1200 Programmable controller
494 System Manual, V4.2, 09/2016, A5E02486680-AK
Description
Pulse
Direction
PWM4
Built-in outputs Q0.6
2
-
SB outputs
Q4.3
-
1
The CPU 1211C does not have outputs Q0.4, Q0.5, Q0.6, or Q0.7. Therefore, these outputs can-
not be used in the CPU 1211C.
2
The CPU 1212C does not have outputs Q0.6 or Q0.7. Therefore, these outputs cannot be used in
the CPU 1212C.
3
This table applies to the CPU 1211C, CPU 1212C, CPU 1214C, CPU 1215C, and CPU 1217C
PTO/PWM functions.
9.8.4
Configuring a pulse channel for PWM or PTO
To prepare for PWM or PTO operation, first configure a pulse channel in the device
configuration by selecting the CPU, then Pulse Generator (PTO/PWM), and choose
PWM1/PTO1 through PWM4/PTO4. Enable the pulse generator (check box). If a pulse
generator is enabled, a unique default name is assigned to this particular pulse generator.
You can change this name by editing it in the "Name:" edit box, but it must be a unique
name. Names of enabled pulse generators will become tags in the "constant" tag table and
will be available for use as one of the following:
● PWM parameter of the CTRL_PWM instruction
● PTO parameter of the CTRL_PTO instruction
You can also write a comment about this specific pulse generator in the "Comment:" edit
box.
Table 9- 192 CPU output: Maximum frequency (PTO) and minimum cycle time (PWM)
CPU
CPU output channel
PTO maximum fre-
quency
PWM minimum cycle
time
1211C
Qa.0 to Qa.3
100 kHz
10 µs
1212C Qa.0 to Qa.3 100 kHz 10 µs
Qa.4, Qa.5
20 kHz
50 µs
1214C and 1215C
Qa.0 to Qa.3
100kHz
10 µs
Qa.4 to Qb.1
20 kHz
50 µs
1217C DQa.0 to DQa.3
(.0+, .0- to .3+, .3-)
1 MHz 1 µs
DQa.4 to DQb.1
100 kHz
10 µs