PowerTec Regenerative Brushless DC Motor Control 1000AR - Manual (Page 28)

Model 1000AR Installation and Operation Manual P AGE
27
OFFICIAL 6/4/2001
HO W DO 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. A jumper from TB2-10
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 20, there is a list of
recommended parameters for the pulse train.
You can also turn on digital mode by moving
the “AF-N” jumper (JP1) on the Current Controller
board to the AF position (the two left pins). After
placing the jumper in the AF position, you do not
have to energize terminal 10.
While in digital mode, 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
1000AR standard drives have 30 pulse per
revolution quadrature encoders. This produces a
120 pulse per revolution (PPR) feedback. 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 3
(TB2-3) is the collector of a transistor (TB2-16 is
common) which switches at twice the motor RPM. If you connect a resistor (at least 1 Kohm minimum)
from TB2-10 (+24 VDC) to TB2-3, you generate a signal that can drive the input of another drive. Connect
TB2-3 on the first control to TB1-11 on the second control, and connect TB2-16 on the first control to TB1-
9 on the second. To switch to digital mode, connect TB2-10 on the first control to TB1-10 on the second.
With this setup, 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.
16 15 14 13 12 11 10 9 8
TB2
11 10 9 8 7 6 5 4 3
SPEED
POT
10K
CW
MAN AUTO
24
VDC
+
-
24VDC
0VDC
TB1
12
R+ R-
16
3
10