AS-i operation
AS-i offline operating mode
At a Glance AS-i offline mode is an advanced operating mode, which can be used for debugging or maintenance.
Note: Its use requires good knowledge of AS-i communication.
Principles
Procedure
When the module is put into offline mode, it first resets all the slaves present to zero and stops exchanges on the bus.
During offline mode, the I/O images in the module are frozen in the state in which they were at the time of the change to the mode.
When the module exits, if the list of slaves present (LPS) equals the list of slaves detected (LDS), the system restarts. If this is not the case, a fault is generated, and it then necessary to transfer to diagnostic or configuration mode.
Offline operating mode can be accessed either: l from the PL7 software application by acting on the 0 and 1 bits of the word
%MW4.0.23, l automatically on detecting an AS-i supply fault.
Reminder: Bit 7 of the word %MW4.0.3 set to 1 indicates that the AS-i Bus is in offline mode.
164
TLX DS 37 PL7 xxE
