ABB FSO-12, Руководство пользователя

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Overview 43
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Safe torque off (STO)
This safety function activates the STO function in the drive, this is, opens the STO
circuit in the drive. The motor coasts to a stop (stop category 0). See section
STO
function on page 56 .

Safe stop 1 (SS1)
This safety function stops the motor safely by ramping down the motor speed to zero
speed (stop category 1). The FSO monitors the stop ramp either with the time or
ramp monitoring method (SS1 function types SS1-t and SS1-r, respectively). See
sections
• SS1 with time monitoring (SS1-t) on page 62 and
• SS1 with ramp monitoring (SS1-r) on page 64 .

Safe stop emergency (SSE)
You can configure this safety function to be similar to the STO (SSE with immediate
STO, stop category 0) or SS1 function (SSE with emergency ramp, stop category 1).
Only the parameters are different from the parameters in the STO and SS1 functions.
See sections
• SSE with immediate STO on page 77 ,
• SSE with time monitoring on page 82 and
• SSE with ramp monitoring on page 84 .

Safe brake control (SBC)
This safety function provides a safe output for controlling external safety brakes.
When you use the SBC function with other safety functions of the FSO module, it is
always combined with the drive STO function. That is, the SBC function is activated
before, at the same time with or after the drive STO function.
STO function and SSE with immediate STO
In these safety functions, you can configure the SBC function to be activated before,
at the same time with or after the drive STO function. See sections:
• SBC after STO on page 57 ,
• SBC before STO on page 59 ,
• SSE with immediate STO, SBC after STO on page 78 and
• SSE with immediate STO, SBC before STO on page 80 .
Note : When you use the SBC function together with the STO function, the SBC is
activated also when the drive STO is activated at zero speed in the SSE and SS1
functions.
Note : The FSO module activates the SSE function after trip limit hits in the SLS and
SMS functions. As a result, this activates the drive STO and SBC functions (for more