Siemens SINUMERIK 828D Function Manual page 32

Description of the Safety Integrated Extended Functions
3.8 Safe Direction (SDI)
Selecting and deselecting SDI
Prerequisite: Adjust the inverter so that after selecting SDI it limits the speed to the direction
of rotation permitted. As soon as the inverter detects the selection of SDI via a fail-safe input,
the following happens:
● After selecting SDI, the inverter limits the speed to the permitted direction of rotation.
● You can also set a delay time, within which time you can ensure that the inverter moves
● You can also set a tolerance, within which the inverter tolerates movement in the
● After the delay time has expired, the inverter monitors the direction of rotation of the
Figure 3-4
Note
As an alternative to control via terminals, there is also an option to parameterize the SDI
without selection function. In this case, the SDI function is permanently active after
POWER ON.
References: SINAMICS S120 Safety Integrated Function Manual,
Chapter: "Commissioning the functions"
32
in the enabled (safe) direction.
direction that has not been enabled (safe).
motor.
Time response of the safety function SDI (Safe Direction)
Function Manual, 07/2012, 6FC5397-3EP40-3BA0
Safety Integrated