Rockwell Automation 1770-M12 Mass Storage Systems - Manual (Page 50)

1770-M11 Mass Storage System
Appendix B
BĆ2
power supply operation with 120V AC or 220V AC
front panel LED indicators to signal “power on” and “system fault”
serial interfacing using the twinaxial cable for multidrop operation with up to
eight PLC3 peripheral communication modules
threeposition baud rate switch for speed/distance control while using the
twinaxial cable interface
SCSI output port for daisychain connection to an auxiliary 1770–M10
system; can support up to three 1770–M10 systems
interfaces to the data cartridge recorder using the diagnostics cartridge
through the TEST port.
File management features include:
capability of supporting up to 4093 files on the Winchester disk drive
capability of supporting up to 2153 files on the micro–floppy diskette
supports up to seven levels of subdirectories
software supported file protection scheme with the following capabilities:
system default is “general user”
up to 250 identified
up to 5 system managers
separate read and write file protection
supports up to 40 open files concurrently
achieves PLC3 main memory save or load operation in less than 30 seconds
(for a 32k word memory)
supports GA Basic file storage via the COPY command.
supports data logging operations to and from the 1770M11 system via the
OPEN, WRITER, READ, CLOSE, and SET RECORD commands.
supports Winchester backup operations in two modes:
can copy the entire contents to another Winchester disk drive via the
COPY/DEVICE command
File Management Features