TB Wood's WFC1000 Series, Installation, Operation And Maintenance Instructions

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37
First, since two of the sequential steps are time based, the proper 81-PRGNO setting must be determined.
Determine the
resolution and the
maximum time re-
quired, in this case
one (1) hour. If a
resolution of one
second is sufficient,
set 81-PRGNO =
60. If a greater set-
ting resolution is
necessary, 81-
PRGNO can be set
to 61 (0.1 second
Programming Example
A machine is required to run in
the forward direction at 50 Hz
for one hour, then quickly
decelerate to a stop. After two
(2) minutes, the machine must
accelerate in the reverse
direction to 5 Hz until a limit
switch is activated causing the
drive to decelerate to a stop.
The following three (3) sequen-
tial steps can be programmed
using only the basic inverter and
no optional equipment.
SEQ1 SEQ2 SEQ3
Direction Selection Forward Stop Reverse
Event Definition 1 Hour 2 Minutes Until PS1 Active
Ramp Selection Primary Alternate Primary
Speed Selection F6 (50 Hz) N/A F2 (5 Hz)
PARAMETER DATA CODE EXPLANATION
81-PRGNO 60 1 Second Time Increments
C1-CNTL1 01000101 FWD/Timed/Primary Ramp/Preset Speed F6
C2-CNTL2 00001000 STOP/Timed/Alt. Ramp/Speed Setting Ignored
C3-CNTL3 10110001 REV/Digital Comparison/Primary Ramp/Preset Speed F2
E1-ENCT1 3600 1 Hour = 3600 Seconds
E2-ENCT2 120 2 Minutes = 120 Seconds
E3-ENCT3 1 Terminal PS1 Active
Graphically the results of this
programming could be repre-
sented as shown to the right:
If E4-ENCT4 thru E9-ENCT9
are set to zero, they will be
ignored by the sequencer
function. If the inverter’s forward
terminal were still active, the
sequence would repeat; if not,
the sequence would be
executed one (1) time only. The
control’s stop key continues to
function as an emergency stop
to abort the cycle at any time.
TABLE 4.2
TABLE 4.3
FIGURE 4.2
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