Downgrade Lock - Siemens Sinamics S120 Function Manual

Basic functions
6.24 Pulse/direction interface
6.23.2

Downgrade lock

The downgrade lock prevents the firmware from being downgraded from firmware upgrades
which were intended to debug firmware programs.
Note
Upgrade higher firmware versions
Components with higher firmware versions are fully downwards compatible with components
with lower firmware versions. Following a firmware upgrade, a component will also operate
without restrictions with components that have a lower firmware version.
NOTICE
Firmware retrofit of a Control Unit
A higher firmware version is also characterized by having a larger range of functions than a
lower firmware version. If you downgrade a Control Unit from a higher to a lower firmware
version, it is possible that certain functions will no longer be available.
6.24 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 speed actual value r0061 thus entered 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
• More information on the Control Unit CU310-2 is provided in
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:
312
the CU320-2.
CU310-2.
Reference: SINAMICS S120 Control Units Manual
Reference: SINAMICS S120 AC Drive Manual
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
Drive functions