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50 Overview
SS1 function and SSE with emergency ramp
In these safety functions, you can configure the SBC and STO combination to be
activated at a user-defined speed limit while ramping down to zero speed. See
sections
•
SS1 with speed limit activated SBC
and
•
SSE with speed limit activated SBC
on page
You can also define a delay so that the SBC is activated first at the user-defined
speed limit and the drive STO after the delay. See sections
•
SS1 with speed limit activated SBC, SBC before STO
and
•
SSE with speed limit activated SBC, SBC before STO
on page
.
Safely-limited speed (SLS)
This safety function prevents the motor from exceeding user-defined speed limits. If
the motor speed reaches the positive or negative SLS trip limit, the FSO module
activates the SSE function and the motor stops. See section
on page
Variable Safely-limited speed (SLS)
This safety function prevents the motor from exceeding user-defined speed limits.
With the variable SLS function, it is possible to scale down the SLS limits with a
safety PLC via PROFIsafe communication. See section
on page
.
Safe maximum speed (SMS)
This safety function is used to protect the machine from too high speeds/frequencies.
You can configure it to be permanently on or off. If the motor speed reaches the SMS
trip limit, the FSO module activates the SSE function and the motor stops. There are
two different versions of the SMS function. See sections
•
on page
and
•
on page
.
Prevention of unexpected start-up (POUS)
This safety function prevents the machine from starting accidentally. The POUS
function activates the drive STO function. See section
on page
.
Safe speed monitoring (SSM)
This safety function provides a safe output signal to indicate whether the motor speed
is between user-defined limits. See section
on page
Summary of Contents for FSO-21
Page 1: ... OPTIONS FOR ABB DRIVES FSO 21 safety functions module User s manual ...
Page 4: ......
Page 16: ...16 Safety instructions ...
Page 34: ...34 Safety information and considerations ...
Page 52: ...52 Overview ...
Page 236: ...236 PROFIsafe ...
Page 265: ...PROFIsafe 265 2 Select your CPU from the list 3 Install the FENA 21 GSDML file ...
Page 275: ...PROFIsafe 275 20 In ABB_Drive FB add blocks DPRD_DAT and DPWR_DAT 21 Insert values to blocks ...
Page 282: ...282 PROFIsafe 5 To read the diagnostic messages select the I O Device Diagnostics tab ...
Page 286: ...286 PROFIsafe ...
Page 304: ...304 Installation ...
Page 400: ...400 Configuration ...
Page 488: ...488 Verification and validation ...
Page 506: ...506 Fault tracing ...
Page 514: ...514 Maintenance ...
Page 536: ...536 Technical data ...