ABB ACS880-07 - Emergency stop, stop category 1 with time monitoring

Emergency stop, stop category 1 with time monitoring
This time scheme diagram illustrates the operation of the Emergency stop, stop category
1 safety function with time monitoring. This option uses the Safe stop 1 (SS1) function of
the FSO module.
Case A: The motor speed reaches the zero speed limit within the user-defined time
Time
Motor speed
1 2
7a 8a
E-stop button
(SS1 request)
Drive STO
status
Reset button
B
5a
C
4a
A
Indication lamp
3a
SS1.14
Contactor
(SBC output)
D
SBC.13
6a
Security delay: When time A has elapsed from the start of the counter (step 1), the FSO
module activates the drive STO and SBC functions (case B). Activation of the SBC function
opens the main contactor/breaker). In case A, the FSO module has already activated the STO
and SBC functions. This is a user-defined value (parameter SS1.14 SS1-t delay for STO).
A
Zero speed limit: Speed limit for activating the drive STO and SBC functions. Activation of the
SBC function opens the main contactor/breaker. This is a user-defined value (parameter
FSOGEN.51 Zero speed without encoder).
B
Safety function response time.C
SBC time to zero speed: When time D has elapsed from the start of the counter (step 3b,
activation of the STO and SBC functions), the user can push the reset button, that is, the ac-
knowledgment of the STO function is possible. The user must set this time longer than the
time the motor coasts from the maximum speed to zero speed (parameter SBC.13 SBC time
to zero speed).
D
1. The user pushes the emergency stop button (this activates the SS1 function of the FSO
module). The FSO module starts a timer for delay A.
2. The drive starts to decelerate the motor along the user-defined stop ramp (SAR1
parameter 200.112 SAR1 ramp time to zero).
3. a) The motor speed goes below the zero speed limit (B). The FSO module activates
the drive STO and SBC functions (this opens the main contactor/breaker).
Note: You can set an additional delay for the STO and SBC activation (parameter
SS1.15 SS1-r ramp zero speed delay for STO).
22 Option description