Siemens SIMOTION C 230-2 Operating Instructions Manual page 53

One clock pulse signal, direction signal, and enable signal is provided as a true and negated
signal.
• Setpoint (PULS)
The clock pulses control the motor. The motor performs one step for each rising pulse edge.
Thus, the number of pulses output determines the angle of rotation, i.e. the distance to be
traversed.
The pulse frequency determines the rotational speed, i.e. the traversing speed.
• Direction signal (DIR)
The output signal level determines the direction of rotation of the motor.
Signal ON: "Rotation to the left"
Signal OFF: "Rotation to the right"
Note
If the direction of rotation of the motor is different, you can change the direction of rotation
by means of the "Reversal of traversing direction" configuration data element. Refer to the
technical documentation of your drive unit for the correct assignment of the signal levels to
the direction of rotation.
• Enable signal (ENABLE)
This signal is activated when the axis enable is set in RUN mode by the user program.
Signal ON: Power control circuit enabled
Signal OFF: Depending on the power unit, one or more of the following responses can occur:
– Disable pulse input
– Deenergize motor
– Reset ring counter
– Delete error messages
Signal parameters
All signals for stepper drives are output by means of differential signal line drivers in accordance
with the RS422 standard. For optimal reliability, the power unit should have differential signal
SIMOTION C
Operating Instructions, 11/2022, A5E33441428B
CAUTION
If your drive unit responds to falling pulse edges, you must replace the true pulse signal with
the negated pulse signal when performing the wiring; failure to do so can cause deviations
to occur between the position calculated by the controller and the actual position.
Note
The ENABLE signal is output at the same time with controller enable contact RF.
Alternatively, you can also use the relay contacts.
4.5 Onboard drive interface (C230-2, C240)
Interfaces
53