Configuring Sto; How To Configure Sto - ABB FSO-21 User Manual

264 Configuration

Configuring STO

To configure the STO function, set the FSO parameters listed below to appropriate
values using the Drive composer pro PC tool. See parameter groups
page 328 and SBC
For more information on the STO and SBC functions, see page 58.
Note: Always set the parameters related to the STO function to have the correct
monitoring limit hit and fault reaction behavior.
Note: If an encoder failure occurs, the FSO module activates the STO function. For
these situations, you have to configure the STO function also without an encoder (set
parameter STO.14 Time to zero speed with STO and modoff
zero speed to a suitable value according to your application).


How to configure STO

Example 1 (without an encoder): The figure below shows an example of a simple
STO function set-up when an encoder is not used:
• redundant emergency stop button connected to input
(STO.11 STO input A
• automatic acknowledgement
• estimated time in which the motor coasts to a stop from the maximum speed is
1500 ms (STO.14 Time to zero speed with STO and modoff
• the fly-start feature is in use, that is, you can restart the drive before the motor has
stopped (STO.13 Restart delay after STO
• no output connected
• no brake (SBC.11 STO SBC usage
Inputs
STO.11
= DI X113:1 & X114:1
STO.12
= None
on page 332.
= DI X113:1 & X114:1)
(STO.02 STO acknowledgement
STO.02
Speed
STO.14
STO.13
STO activated
= 1000 ms)
= None).
= Automatic
= 1500 ms
= 1000 ms
SBC.11 = None
STO on
or SBC.13 SBC time to
= Automatic)
= 1500 ms)
Outputs
STO.21
= None
STO.22
= None
Time