Delta EB3000 Series User Manual page 80

4-9-4 Description of STO Function
STO input, in compliance with the STO function defined by IEC/EN 61800-5-2, meets the requirements
as shown in Figure 4-24, and provides a STO status monitor used for detecting errors in the safety
circuit.
4-9-4-1 STO Active and Non-active
Figure 4-26 illustrates the STO input operation.
STO Active
Whenever either or both STO inputs is/are OFF, motor torque can be stopped by disabling the
drive output. But if the motor has been running before STO inputs are OFF, the elevator will coast
to stop.
NOTE:
1. STO Active can only be acquired by using STO1/STO2 inputs. When STO1/STO2 inputs are
ON and the Up/Down command is deactivated, the drive stops and output disables, and STO
Active (Baseblock) is unable to be entered.
2. After the motor fully stops, ensure that STO inputs are OFF in order to prevent the motor from
out of control during normal operation.
STO Non-active
When both STO1 and STO2 are ON and in STO Non-active status and if the Up/Down command is
given before STO1/STO2 inputs are ON, the drive immediately starts the motor to generate torque.
Figure 4-26 STO Operation
4-27
Chapter 4 WiringEB3000