Model
1000
Installation and Operation Manual
Page
23
OFFICIAL 6/1/2001
H
OW
D
O
I …
CONNECT A DIGITAL SPEED REFERENCE?
Apply +24VDC to TB1 terminal 10 (TB1-10)
with respect to TB1-9 to operate the Model 1000
with a digital reference. Terminal 9 on TB1 is
NOT the same as drive common, so a jumper
from TB2-8 or TB2-17 will NOT switch to digital
mode unless you connect TB1-9 to a drive
common terminal (TB1-16).
With +24VDC on TB1-10, a pulse train at
TB1-11 (with respect to TB1-9) commands the
motor movement. On page 22, there is a list of
the parameters for the pulse train.
You can also activate digital mode by
moving the “AF-N” jumper (JP1) on the Current
Controller board to the AF position (the two left
pins). Placing the jumper in the AF position
makes it unnecessary to energize terminal 10.
While in digital mode, the Speed Controller
board adjustments related to speed do not
function, that is, SPEED POT, MIN SPD, MAX
SPEED, ACCEL, DECEL, and JOG. The pulse
train input governs the movement of the motor.
Almost all motors used with the Model 1000
and 1000A standard drives have 30 pulse per
revolution quadrature encoders. This produces a
120 pulse per revolution (PPR) feedback, so each
pulse put into the drive is a command to turn 3° in
its mechanical rotation.
The pulse train input for a
GENESIS
drive
may come from another
GENESIS
drive, since
there is an output on TB2 (the figure below shows
Model 1000 connections). Terminal 15 (TB2-15) is
the collector of a transistor (TB2-12 is common) which switches at twice the motor RPM. If you connect a
resistor (at least 1 Kohm minimum) from TB2-17 (+24 VDC) to TB2-15, you generate a signal that can
drive the input of another drive. Connect TB2-15 on the first control to TB1-11 on the second control, and
connect TB2-12 on the first control to TB1-9 on the second. To switch to digital mode, connect TB2-17 on
the first control to TB1-10 on the second control.
With this arrangement, the second motor will
operate at exactly the same speed as the first, as
long as you avoid current limit on the second
control. If the first control encounters current limit,
or changes speed for any other reason, the
second one (the follower) will follow it in speed,
even to zero speed.
1615141312111098
TB2
1615141312111098 1817
SPEED
POT
10K
CW
MAN AUTO
24
VDC
+
-
24VDC
0VDC
TB1
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