ABB DCS 500B Description page 27

DCS 500 Software Description
- if STARTSEL (1717) = 1 (flying start):
the RUN command is no longer edge sensitive; the drive
will accelerate according to the reference, when the RUN
command is set to 1, independant, if the actual speed was
zero or different to zero before; if the drive was stopped by
the ON/OFF command (the RUN command was kept to
logic 1 level), it will react when ON/OFF changes from 0 to
1 in the same way, as if the RUN command would have
been used
- Coast Stop
When [COAST STOP] (905) input is set to logical state 1,
regulators are blocked and contactors remain closed. The drive
is allowed to decelerate freely towards zero speed. As long as
the drive stops in this way, the stop functions available with the
RUN command are disabled and vice versa.
This stop mode can be interrupted by Emergency Stop, Stop
because of panel or field bus link problems.
- Emergency Stop
If [EME STOP] (906) signal is set from 1 to 0, the emergency
stop function is activated. The reaction of the drive can be de-
fined by paramter EME STOP MODE (917) :
0 = stop by ramp (EMSTOP_RAMP (1714) ) at
RAMP GENERATOR function block
1 = stop by torque limit
2 = coast stop (torque is zero)
3 = dynamic brake
The state of the output signal EMESTOP ACT (10907) changes
0 -> 1. The drive will come up with an ALARM, which must be
reset and which will open all contactors at zero speed (with
coasting immediatelly).
For resetting the fault, see OPERATING INSTRUCTION
This stop mode can interrupt the Stop because of panel or field
bus link problems.
Functional Software description
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