Galil DMC-2X00 用户手册

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The DMC-2x00 circuitry can be divided into the following functional groups as shown in Figure 1.1 
and discussed below. 

 

WATCHDOG TIMER

68331

MICROCOMPUTER

WITH

4 Meg RAM

4 Meg FLASH EEPROM

HIGH-SPEED

MOTOR/ENCODER

 

INTERFACE

FOR

A,B,C,D

I/O INTERFACE

USB/ETHERNET

 

RS-232 /

RS-422

 

8 UNCOMMITTED

ANALOG INPUTS

HIGH-SPEED LATCH FOR EACH AXIS

8 PROGRAMMABLE,

OPTOISOLATED

INPUTS

8 PROGRAMMABLE

 

OUTPUTS

ISOLATED LIMITS AND
HOME INPUTS
MAIN ENCODERS
AUXILIARY ENCODERS

+/- 10 VOLT OUTPUT FOR
SERVO MOTORS
PULSE/DIRECTION OUTPUT
FOR STEP MOTORS

HIGH SPEED ENCODER
COMPARE OUTPUT

64 Configurable I/O

 

 

The main processing unit of the DMC-2x00 is a specialized 32-Bit Motorola 68331 Series 
Microcomputer with 4 Meg RAM and 4 Meg Flash EEPROM. The RAM provides memory for 
variables, array elements and application programs.  The flash EEPROM provides non-volatile storage 
of variables, programs, and arrays.  It also contains the DMC-2x00 firmware. 

Galil’s GL-1800 custom, sub-micron gate array performs quadrature decoding of each encoder at up to 
12 MHz.  For standard servo operation, the controller generates a +/-10 volt analog signal (16 Bit 
DAC).  For sinusoidal commutation operation, the controller uses two DACs to generate two +/-10 
volt analog signals.  For stepper motor operation, the controller generates a step and direction signal.   

The communication interface with the DMC-2x00 consists of high speed RS-232 and USB or high 
speed RS-232 and Ethernet.  The USB channel accepts based rates up to 12Mb/sec and the two RS-232 
channels can generate up to 115K.