General Information; Data Cartridge - Allen-Bradley 1770-SB User Manual

Data cartridge recorder
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Chapter 1
Introduction

General Information

Data Cartridge

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The Data Cartridge Recorder is a portable, light-weight, recording device.
The recorder is used to load user programs into and record the contents of
memories of Allen-Bradley PLC, PLC-2 Family, PLC-3 and PLC-4
Programmable Controllers; and Series 7100 and Series 8200
Computerized Numerical Controllers, and Series 8200 Robot Control.
NOTE: Although programs can be duplicated from one tape to another,
Allen- Bradley does not recommend this practice because there is no
verification of programs when you duplicate the program. If an error
occurs during the duplication, you may not be able to load the tape.
There are several reasons for recording a user program, including:
Providing a dependable back-up to processor memory.
Allowing off-line storage for multiple programs, including diagnostic
programs.
WARNING: Never use diagnostic programs when the
processor is on line. Unintended machine motion may occur
causing possible equipment damage and/or injury to personnel.
Providing a source or valid record when temporary modifications to a
program are required.
Allowing identical programs to be used on several machines.
Series B data cartridge recorders may also transmit and receive programs
in the manual mode. In this mode, all control lines are disabled. Data is
transmitted over a 3-conductor cable.
The manual mode of operation makes the recorder compatible with both
the XL2 and XL3 translator packages.
Refer to publication 6004-800 for use with the XL2 translator package.
Refer to publication 6005-800 for use with the XL3 translator package.
The data cartridge recorder uses the Allen-Bradley Mini Data Cartridge
(cat. no. 1770-XJ). The mini data cartridge is shown in figure 1.1. It is a
2-track magnetic tape storage medium. Each track stores 72K words
(max) (K-1024). Compatible tapes must conform to ANSI X3.48-1977.

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