Pulse/Direction Interface - Siemens SINAMICS S120 Function Manual

Basic functions

6.25 Pulse/direction interface

6.25 Pulse/direction interface
Thanks to the pulse/direction interface, in the SERVO and VECTOR control modes,
SINAMICS S120 can be used for simple positioning tasks on a controller.
● The encoder interface of the SMC30 (connector X521) is used to connect the controller to
● The internal encoder interface at connector X23 is used to connect the controller to the
The controller enters the setpoints for the pulse/direction signals to the drive via the encoder
interface.
The specified actual speed value r0061 can then be connected as speed setpoint to the fixed
setpoint p1155 via BICO.
Note
• More information on the Control Unit CU320-2 and the SMC30 is provided in the
• More information on the Control Unit CU310-2 is provided in the SINAMICS S120 AC
Application: Speed-controlled drive
The drive is subject to speed control when operating on the controller. The clock frequency
stipulates the speed setpoint. The pulse number is entered in p0408. This is calculated from
the clock frequency of the controller and the preferred maximum motor speed. The following
formula applies:
Pulse number = (max. clock frequency • 60)/max. speed
Example: If the controller has a maximum clock frequency of 100 kHz and the motor being
used is to run at its maximum rated speed of 3000 rpm, the resulting pulse number will be
2000.
Wiring the SMC30 input signals
The input signals for the pulse/direction interface are wired via connector X521 of the
SMC30:
Table 6- 15
Pin
1
2
3
4
5 ... 8
370
the CU320-2.
CU310-2.
SINAMICS S120 Control Units Manual.
Drive Manual.
Wiring the SMC30
Signal name
Pulse
M
Direction of rotation
M
Not relevant
Technical specifications
–
Ground
–
Ground
–
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
Drive functions