Safety engineering
Device modules
Function mode of the safety modules
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EDS94AYAE EN 6.0
1.2.2 Function mode of the safety modules
C00214
The setting in C00214 must comply with the plug−in safety module type so that the
controller is able to operate.
Disconnecting paths
The transmission of the pulse width modulation is safely disconnected by the safety
module. Hence the drivers do not create a rotating field. The motor is safely switched to
torqueless operation (STO).
SSP94SM320
Fig. 1−1 Disconnecting paths of the safety modules
SMx Safety module
xx Input / output terminal
C Control section
mC Microcontroller
PWM Pulse width modulation
P Power section
M Motor
Safety status
When the controller is switched off by the safety module, the controller switches to the
"Safe torque off"device state.
ƒ "Controller in STO state" is entered into the logbook (0x00750003).
ƒ "Safe torque off active" is displayed in C00183.
Fail−safe status
Note!
If internal errors of the safety modules are detected, the motor is safely
switched to torque−free operation (fail−safe status).
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