![background image](http://html.mh-extra.com/html/ge/af-650-gp-series/af-650-gp-series_design-and-installation-manual_121818081.webp)
Figure 6.24 Brake release sequence for hoist mechanical brake control
I)
Activate brake delay:
The adjustable frequency drive starts again from the
mechanical brake engaged
position.
II)
Stop delay:
When the time between successive starts is shorter than the setting in
B-24 Stop Delay
, the adjustable frequency drive starts
without applying the mechanical brake (e.g. reversing).
NOTE!
For an example of advanced mechanical brake control for
hoisting applications, see section
Application Examples
6.7 Logic
Controller
Logic Controller (LC) is essentially a sequence of user-
defined actions (see
LC-52 Logic Controller Action
[x])
executed by the LC when the associated user-defined
event
(see
LC-51 Logic Controller Event
[x]) is evaluated as
TRUE by the LC.
The condition for an event can be a particular status or
that the output from a logic rule or a comparator operand
becomes TRUE. That will lead to an associated action as
illustrated.
Events and
actions
are each numbered and linked together
in pairs (states). This means that when
event
[0] is fulfilled
(attains the value TRUE),
action
[0] is executed. After this,
the conditions of
event
[1] will be evaluated and if
evaluated TRUE,
action
[1] will be executed and so on.
Only one
event
will be evaluated at any time. If an
event
is
evaluated as FALSE, nothing happens (in the LC) during
the current scan interval and no other
events
will be
evaluated. This means that when the LC starts, it evaluates
event
[0] (and only
event
[0]) each scan interval. Only when
event
[0] is evaluated TRUE, will the LC execute
action
[0]
and start evaluating
event
[1]. It is possible to program
from 1 to 20
events
and
actions
.
When the last
event
/
action
has been executed, the
sequence starts over again from
event
[0]/
action
[0]. The
figure shows an example with three event/actions:
Figure 6.25
Application Setup Examples
AF-650 GP
TM
Design and Installation Guide
6-26
DET-767A
6
6
Summary of Contents for AF-650 GP Series
Page 3: ...Safety AF 650 GPTM Design and Installation Guide DET 767A ...
Page 9: ...Contents AF 650 GPTM Design and Installation Guide DET 767A ...
Page 19: ...Introduction AF 650 GPTM Design and Installation Guide 1 10 DET 767A 1 1 ...
Page 35: ...Installation AF 650 GPTM Design and Installation Guide 2 16 DET 767A 2 2 ...
Page 41: ...Start Up and Functional Tes AF 650 GPTM Design and Installation Guide 3 6 DET 767A 3 3 ...
Page 55: ...About Programming AF 650 GPTM Design and Installation Guide 5 10 DET 767A 5 5 ...
Page 91: ...Application Setup Examples AF 650 GPTM Design and Installation Guide 6 36 DET 767A 6 6 ...
Page 103: ...Status Messages AF 650 GPTM Design and Installation Guide 8 4 DET 767A 8 8 ...
Page 123: ...Warnings and Alarms AF 650 GPTM Design and Installation Guide 10 10 DET 767A 10 0 ...
Page 127: ...Basic Troubleshooting AF 650 GPTM Design and Installation Guide 11 4 DET 767A 11 1 ...
Page 129: ...Terminal and Applicable Wir AF 650 GPTM Design and Installation Guide 12 2 DET 767A 12 2 ...
Page 161: ...Specifications AF 650 GPTM Design and Installation Guide 13 32 DET 767A 13 3 ...