Functions - Siemens SIMATIC S7-1500 Manual

Product overview

2.2 Functions

2.2 Functions
2.2.1 Pulse Train Output (PTO)
Applications
Pulse Train Output is a simple and universal interface between a SIMATIC controller and a
drive. PTO is supported worldwide by many stepper and servo drives and is used in many
positioning applications, such as for adjustment axes and feed axes.
PTO is also referred to as the pulse/direction interface. The pulse/direction interface
comprises two signals. The frequency of the pulse output represents the speed and the
number of pulses that are output represents the distance to be traversed. The direction
output defines the traversing direction. The position specification is thereby accurate to
within one increment. The pulse/direction interface is especially well-suited for operation with
the technology objects TO_SpeedAxis, TO_PositioningAxis and TO_SynchronousAxis.
Control
The control of the pulse output channels is provided above all with S7-1500 Motion Control
by means of the technology objects TO_SpeedAxis, TO_PositioningAxis and
TO_SynchronousAxis . The control and feedback interface (Page 34) of the channels is an
implementation of the PROFIdrive interface with standard frame 3.
For a detailed description of configuring the technology module with the axis technology
objects, see Function Manual S7-1500T Motion Control, section "Configuring", which is
available for download on theInternet
(https://support.industry.siemens.com/cs/ww/en/view/109481326).
Signal types
The technology module supports the following four signal types:
● Pulse (P) and direction (D):
One output (P) controls the pulses and one output (D) controls the direction. D is 'high'
(active) when pulses are generated in the negative direction. D is 'low' (inactive) when
pulses are generated in the positive direction.
14
①
Positive direction of rotation
②
Negative direction of rotation
Technology Module TM PTO 4 (6ES7553-1AA00-0AB0)
Manual, 12/2016, A5E38896703-AA