Baldor 23H Series, Инструкция по установке и эксплуатации, Страница: 48 / 127

NOTE: FOR 4-20MA INPUT MOVE JUMPER JP1 ON THE MAIN CONTROL BOARD
TO THE LEFT TWO PINS.
J1-8 OPEN disables the control & motor coasts to a stop. CLOSED allows current to flow
in the motor and produce torque.
J1-9 CLOSED to enable operation in the Forward direction. OPEN TO DISABLE Forward
operation (drive will brake to a stop if a Forward command is still present).
J1-10 CLOSED to enable operation in the Reverse direction. OPEN to disable Reverse
operation (drive will brake to a stop if a Reverse command is still present).
J1-11 Causes the motor shaft to orient to the index marker (or home offset).
J1-12 CLOSED puts the control in torque mode.
J1-13 &14 Select from four parameter tables per truth Table 2.3.
J1-15 OPEN to run, CLOSED to reset fault condition.
J1-16 OPEN causes an external trip to be received by the control. Control will disable and
display fault.
Table 2.3 Truth Table for Bipolar Speed or Torque Control Mode
Multiple Parameter Tables
Function J1-13 J1-14
Parameter Table #0 Open Open
Parameter Table #1 Closed Open
Parameter Table #2 Open Closed
Parameter Table #3 Closed Closed
Process Control Mode
The process control mode is a secondary closed loop system which includes a general purpose set
point PID control. It may be setup in two different ways. One uses a programmable preset set point
and the other uses an external command set point input. In either case a process feedback signal
will be required.
The selection of the set point command and the process feedback signal is located in the Process
Control programming block under the Set point Source Parameter and Process Feedback
Parameter respectively.
The programmable preset set point PID control mode can be used for most general closed loop
systems. This is generally known as feedback control. This method compares the value of the
programmed preset variable with the process variable. The difference between them is the process
error. The process error is then converted to a signal that adjusts the speed or torque of the motor
to eliminate the error. A large process error will result in a large change in the rate of speed or
amount of torque generated by the motor. Likewise, a small error signal will produce a small change
in the rate of speed or amount of torque generated by the motor. The end result is the PID control
2-37 INSTALLATION
MN723H-10/95 11/28/95 1:10 AM Page 49 (Black plate)