SST SST-ASI-SLC, User Manual

Page: 52 / 74

SST-ASI-SLC User’s Guide
46
7.3 M0 and M1 Files
The M0 file contains information about AS-i Channel 1 and the M1 file
contains information about AS-i Channel 2. Both files must be set to a length
of 40 words. M files cannot be edited. They are updated by the scanner once
per network scan or when requested by the SLC program. The M files are
updated in program mode or when the SLC is faulted. In order to read the
updated M file, the SLC program must scan the file. Scanning the M files is
very time consuming and may greatly increase SLC scan time. To speed up
the scan, copy the M files to a local SLC file and use the local file.
The table on the following page outlines the contents of the M0 and M1 files.
The following short forms are used in the table:
• LPS = List of Projected Slaves (slaves listed in the EEPROM)
• LDS = List of Detected Slaves (slaves actually found whether in
LPS or not)
• LAS = List of Activated Slaves (slaves listed in both LPS and LDS)
• SDL = Slave Delta List (slaves listed in either LPS or LDS but not in
both)
For each bit of the LPS, LDS and LAS lists, 1 is present, 0 is absent. For the
SDL, 1 indicates a discrepancy between LPS and LDS, 0 indicates a match
between LPS and LDS.
If a slave is not present on the network, ID and I/O in the following table will
be listed as FF (all bits set to 0).
For more information on the Status Flag Bytes (word 26), refer to section
7.3.1 and section 7.3.2.