Configuring A Pulse Channel For Pwm - Siemens S7-1200 System Manual

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Configuring a pulse channel for PWM

To prepare for PWM operation, first configure a pulse channel in the device configuration by

selecting the CPU, then Pulse Generator (PTO/PWM), and choose PWM1 through PWM4.

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 the PWM

parameter of the CTRL_PWM instruction.

Table 8- 150 CPU output: maximum frequency

1214C and 1215C

S7-1200 Programmable controller

System Manual, 03/2014, A5E02486680-AG

Built-in outputs

Built-in I/O

Built-in outputs

The CPU 1211C does not have outputs Q0.4, Q0.5, Q0.6, or Q0.7. Therefore, these outputs

cannot be used in the CPU 1211C.

The CPU 1212C does not have outputs Q0.6 or Q0.7. Therefore, these outputs cannot be used in

the CPU 1212C.

This table applies to the CPU 1211C, CPU 1212C, CPU 1214C, CPU 1215C, and CPU 1217C

PTO/PWM functions.

CPU output channel

Qa.0 to Qa.3

Qa.0 to Qa.4

Qa.5 to Qb.1

DQa.0 to DQa.3

(.0+, .0- to .3+, .3-)

DQa.4 to DQb.1

Pulse and direction

Extended instructions

A/B, quadrature, up/down,

and pulse/direction