User manual

Chapter 1 Introduction to the 2762-17
ADVANCED MICRO CONTROLS INC.
5
This chapter describes the uses and functionality of the 2762-17 module and
compatible AMCI transducers.
The 2762-17 Intelligent Position Control Module
The 2762-17 Intelligent Position Control Module is a two channel, non-servo positioning
controller for Allen-Bradley 1771 I/O systems. Each channel has four DC outputs for motor
speed and direction control and utilizes a brushless resolver based transducer for absolute
multiturn position feedback. Examples in this manual show the 2762-17 controlling only one
channel. This is for clarity only. The 2762-17 is a true two channel controller that can drive
both channels simultaneously.
Module configuration is accomplished
from the processor or integral keyboard and
display. Module configuration includes
transducer setup, which sets the relationship
of transducer position to load position, and
positioning setup, which sets the loads' target
position and the motor control parameters
needed to reach the target position once a
Move Profile is initiated.
Once configured, the 2762-17 waits for a
move profile command. Once the command
is given from the processor or keyboard, the
module uses the transducer position to fire its
motor control outputs at the appropriate
positions. The 2762-17 turns the motor off at
a programmed stop position and the load
coasts to the target position.
If the load does not stop at the target
position, the 2762-17 adjusts the stop position
and runs the move profile again. Because
inertia and friction in most systems is
repeatable, the module can accurately
position the load without servo feedback.
The 2762-17 also gives you the ability to
jog the position from the processor, keyboard
or external input.
The 2762-17 uses block transfer writes to program the module from the processor. It uses
block transfer reads to transmit position and tachometer information or programming data back to
the processor. The module uses single transfer writes to initiate move profiles or jog the load
position from data in the output data table. It uses single transfer reads to transmit positioning
status to the input data table. The 2762-17 can perform concurrent block and single transfers.
2762-17
TRANSDUCER
MOTOR
LEAD
SCREW
LOAD
Figure 1.1 Typical 2762-17 Application