GE AF-650 GP Design And Installation Manual page 82

Application Setup Examples
Comparators
Comparators are used for comparing continuous variables
(i.e. output frequency, output current, analog input, etc.) to
fixed preset values.
Figure 6.26
Logic Rules
Combine up to three Boolean inputs (TRUE/FALSE inputs)
from timers, comparators, digital inputs, status bits and
events using the logical operators AND, OR, and NOT.
Figure 6.27
TM
AF-650 GP Design and Installation Guide
Application Example
Table 6.23 Using Logic Controller to Set a Relay
DET-767A
Parameters
Function Setting
H-20 Motor
Feedback Loss
Function [1] Warning
H-21 Motor 100 RPM
Feedback Speed
Error
H-22 Motor 5 s
Feedback Loss
Timeout
PI-00 Speed PID [2] OPCENC
Feedback Source
EC-11 Resolution 1024*
(PPR)
LC-00 Logic [1] On
Controller Mode
LC-01 Start [19] Warning
Event
LC-02 Stop [44] Reset
Event key
LC-10 Comparat [21] Warning
or Operand no.
LC-11 Comparat [1] ≈*
or Operator
LC-12 Comparat 90
or Value
LC-51 Logic [22]
Controller Event Comparator 0
LC-52 Logic [32] Set
Controller Action digital out A
low
E-24 Function [80] Logic
Relay Control
digital output
A
* = Default Value
Notes/comments:
If the limit in the feedback
monitor is exceeded, Warning
90 will be issued. The LC
monitors Warning 90 and in the
case that Warning 90 becomes
TRUE then Relay 1 is triggered.
External equipment may then
indicate that service may be
required. If the feedback error
goes below the limit again
within 5 s then the drive
continues and the warning
disappears. But Relay 1 will still
be triggered until [Reset] on
the keypad.
6-27
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