OPTO 22 G4LC32, User Manual

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G4LC32 User’s Guide
Two of the serial ports, COM0 and COM1 can be used as RS-232 ports
or
as RS-422/485 ports. Plug removable
terminal blocks are provided for both the RS-422/485 and the RS-232 connections. The RS-232 ports can be used
by your application program to communicate with standard serial devices such as printers, bar code readers, etc.
An ARCNET port is provided for even faster communications between units. Opto 22 supports star type ARCNET
networks. You can connect as many as 254 G4LC32’s (or other ARCNET devices) to the ARCNET network. The
ARCNET network uses standard RG62A/U coaxial cable and it runs at 2.5 MHz.
A battery backed real-time clock is provided for time dependent tasks.
Front Panel
The G4LC32 features a front panel with a 4-line by 20-character, backlight LCD display, a 25-button keypad, LED
status indicators for POWER, PROCESSOR OK, FAULT and communications status LEDs. From the front panel, you
can enter a setup mode which allows you to view and/or change the G4LC32 address, the security passwords and
the serial port baud rates. If you download the terminal task from Cyrano 200 or OptoControl, then you can use the
display and keyboard as a terminal to view and or set parameters in your Cyrano 200 applications program. More
information on the G4LC32 front panel will be provided in a later section.
Basic Architecture
The G4LC32 processor’s 32-bit architecture, 512 KB of battery backed RAM (expandable to 4 MB) and 512 KB of
Flash EPROM (expandable to 1 MB) allows you to execute large control applications with extensive data storage
requirements.
The heart of the G4LC32 Model 200 Processor is a 32-bit 68020 microprocessor coupled with a 68881 floating-point
math coprocessor. The 68881 math coprocessor supports IEEE floating-point math for accurate calculations.
ARCNET support allows multiple Mistic controllers to be organized into large, distributed systems.
INTRODUCTION
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