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Safety functions 163
SLS reaction if modulation is lost with Monitoring and modoff delay time
disabled
The operation of the SLS function in case the modulation of the drive is lost during the
deceleration ramp with Monitoring and modoff delay time disabled selected
(parameter
is set to Monitoring and modoff delay time disabled) is described
in the time diagram and table below. For configuration, see section
SLS function behavior when drive modulation is lost
.
B
Actual motor speed (coasting after modoff)
C
SLS trip limit
D
SLS limit
Step Description
1
The SLS request is received. The motor speed is above the SLS trip limit positive (A).
The drive starts to ramp down the motor speed.
The drive (parameter 23.13 or 23.15) defines the deceleration ramp until the speed
reaches the SLS limit.
The FSO starts the counter for the SLS time delay (C) (parameter
)
2
The drive trips on a fault, there is a drive power loss, or user stops the drive by coast
stop. Here, STO is not activated due to loss of modulation.
delay starts.
3
If modulation does not return, SLS indication goes on after
delay has elapsed.
SLS indication
Motor speed
Time
1
3
2
B
Drive modulation
SLS request
SLSx.04 time
delay monitoring
C
D
STO.14 delay
Содержание FSO-21
Страница 1: ... OPTIONS FOR ABB DRIVES FSO 21 safety functions module User s manual ...
Страница 4: ......
Страница 16: ...16 Safety instructions ...
Страница 34: ...34 Safety information and considerations ...
Страница 52: ...52 Overview ...
Страница 236: ...236 PROFIsafe ...
Страница 265: ...PROFIsafe 265 2 Select your CPU from the list 3 Install the FENA 21 GSDML file ...
Страница 275: ...PROFIsafe 275 20 In ABB_Drive FB add blocks DPRD_DAT and DPWR_DAT 21 Insert values to blocks ...
Страница 282: ...282 PROFIsafe 5 To read the diagnostic messages select the I O Device Diagnostics tab ...
Страница 286: ...286 PROFIsafe ...
Страница 304: ...304 Installation ...
Страница 400: ...400 Configuration ...
Страница 488: ...488 Verification and validation ...
Страница 506: ...506 Fault tracing ...
Страница 514: ...514 Maintenance ...
Страница 536: ...536 Technical data ...
Страница 538: ...538 Dimension drawings 3AXD50000018513 ...