Publication 1747-UM655B-EN-P - June 2007
Configuring the M0/M1 Files by Using RSLogix 500 Software 123
Programming the Module
by Using the SLC M0 and
M1 Files
The M0 and M1 files are data files that reside in the module. There is
no image for these files in the processor memory. The M0 file is a
module output file and the M1 file is a module input file. Both M0 and
M1 files are read/write files.
M0 and M1 files can be addressed in your ladder program and they
can also be acted upon by the module, independent of the processor
scan.
Address the M0-M1 Files
The addressing format for M0 and M1 files is as follows:
Mf:S.w/b
Where M = module
f = file (0 or 1)
S = slot (1…30)
w = word (0-maximum supplied by the module)
b = bit (0…15)
IMPORTANT
During the processor scan, M0 and M1 data can be changed
by the processor according to ladder diagram instructions
addressing the M0 and M1 files. During the same scan, the
module can change M0 and M1 data, independent of the
rung logic applied during the scan.
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