Configuration 337
How to configure STO with speed limit activated SBC
This safety function requires that you use an encoder in the safety application.
Configure the safety encoder interface first (see section Configuring the safety
encoder interface on page 313).
Note: If you configure the STO with speed limit activated SBC function, this activates
the same function in the SSE with immediate STO function (see section How to
configure SSE with immediate STO with speed limit activated SBC on page 353).
For more information on the STO with speed limit activated SBC, see page 77.
Example: The figure below shows an example of a set-up of the STO with speed limit
activated SBC:
• STO with speed limit activated SBC, speed limit: 60 rpm
(SBC.11 STO SBC usage = Speed limit, SBC.14 STO SBC speed = 60 rpm)
• zero speed limit where STO function is completed and it can be acknowledged is
40 rpm (parameter FSOGEN.52 Zero speed with encoder = 40 rpm)
• redundant emergency stop button connected to input
(STO.11 STO input A = DI X113:1 & X114:1)
• automatic acknowledgement (STO.02 STO acknowledgement = Automatic)
• 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 = 500 ms)
• brake connected to redundant output, diagnostic pulses activated
(SBC.21 SBC output = DO X113:7 & X114:7, SAFEIO.53 and SAFEIO.56 = On),
SAFEIO.21 Safety relay 1 output = DO X113:7 & X114:7)
• STO is activated if brake feedback fails (SBC.22 SBC feedback action = STO)
• brake feedback input connected to input
(SAFEIO.22 Safety relay 1 feedback =
DI X113:2)
• feedback input type NC (inverted state compared with the brake relay)
(SAFEIO.23 Safety relay 1 feedback type = Mechanically linked NC contacts).
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