Siemens SIMATIC S7 System Manual page 613

● AB quadrature phase (2 output): P0 leads P1 for a negative direction. P1 leads P0 for a
positive direction. This is shown in the figure below:
● Single phase (1 output): Negative polarity is not allowed in this phasing mode.
The default setting for the "Directional Control" dialog is "Single phase (2 output)" and
"Positive polarity".
Note
You cannot choose to which pins P0 and P1 are configured; this is hardcoded to a specific
pin. Refer to the Mapping I/O section (preceding this section) for the pin mapping list.
Safety precautions when using an Axis of Motion
The limit and stop functions in the Axis of Motion are electronic logic implementations that
do not provide the level of protection provided by electromechanical controls.
Control devices and Axis of Motion functions can fail in unsafe conditions, which can result
in unpredictable operation of controlled equipment. Such unpredictable operations could
result in death or serious personal injury, and/or property damage.
Consider using an emergency stop function, electromechanical overrides, or redundant
safeguards that are independent of the Axis of Motion and the CPU.
Configure response to physical inputs
1. Select the response to the LMT+, the LMT-, and the STP inputs.
2. Use the dropdown list to select: decelerate to a stop (default) or immediate stop.
Entering maximum start and stop speed
Enter the maximum speed (MAX_SPEED) and Start/Stop Speed (SS_SPEED) for your
application.
S7-200 SMART
System Manual, V2.3, 07/2017, A5E03822230-AF
AB quadrature phase (2 output)
(Negative polarity): positive rotation
P1 leads P0
WARNING
Open loop motion control
12.5 Configuring an Axis of Motion
(Negative polarity): negative rotation
P0 leads P1
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