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Chapter 5
Troubleshooting Your System
For 1770-M11 System Only
Symptom
Operating system
program will not load
from the hard disk.
Operating system will
not load from the
micro- floppy diskette.
5 2
Probable Cause
No power to the 1770-M11 system.
Winchester disk no longer contains a valid operating
system.
Winchester disk is not properly formatted.
Failure of an internal component (Winchester disk,
power supply, DMIM, or SCSI).
No power to the 1770-M11 system.
Micro-floppy is not properly seated into the disk drive.
Micro-floppy does not contain a valid operating system
program.
Failure of one or more of the internal components
(power supply, micro-floppy drive, DMIM, SCSI).
ATTENTION: : Hard–disk memories such as the 1770–M10 and
M11 Mass Storage Systems are subject to hard errors making it
impossible to read some data. If you use such a system to store and
retrieve data that is critical to control applications, you must ensure
that your program includes a procedure that operates equipment
safely when data is lost.
This procedure may consist of examining the error bit in a message instruction
in the ladder logic program or including an ONERR routine when using GA
Basic.
Recommended Action
Connect power cable
Load the operating system program from the
micro-floppy.
Format the Winchester disk. Refer to the 1775-GA
Module User's Manual (publication 1775-808).
Call your Allen-Bradley sales engineer or distributor.
Connect power cable.
Eject micro-floppy and insert again.
Format the micro-floppy. Refer to the 1775-GA
Module User's Manual.
Call your Allen-Bradley sales engineer or distributor.
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