2. ADC RAM, including the RAM Disk (the RAM: device), is automatically cleared on the first power-up after
the ADC system PROM (U39) is changed. You should archive any ADC systems from the ADC module to
an attached computer ’s hard disk (the PC: device) before upgrading the firmware on the module.
Problems Resolved by This Upgrade
%P and %L
1. If an ADS system containing data sources or alarm sources referencing %P or %L PLC locations was
executed from the RAM: drive of a “G” revision (only) ADC311 module, files could be corrupted on the
ADC module. This could lead to aberrant behavior of the ADC module, including constant resetting of the
module or the module OK LED going out.
Although the 90-30 PLC does not support the %P and %L memory types (they are only supported by the
90-70 PLC), the ADS demonstration systems shipped as part of the ADS software release do have such ref-
erences in them. This is because the ADS software may be used with either the 90-30 or the 90-70 PLC.
The file corruption occurred during the system load process, not during the process of collecting data from
the PLC, so the corruption would occur with the ADC311G module also if a demonstration system was
loaded to the module’s RAM: drive
Warning: include_once(/js/tracking.php): failed to open stream: No such file or directory in /var/www/series/revision.php on line 248
Warning: include_once(): Failed opening '/js/tracking.php' for inclusion (include_path='.:/usr/share/php:/usr/share/pear') in /var/www/series/revision.php on line 248