This version allows the subscription to the following types of events:
MODE: Report status of PLC.
SYS: Report system events.
USR: Report user events.
ALM_S: Report ALARM_SQ,ALARM_S,ALARM_SC,ALARM_DQ,ALARM_D.
ALM_8: Report NOTIFY_8P, ALARM,ALARM_8P, NOTIFY
The ALM_S events are generated by the S7-300. The S7-400 PLCs support ALM_S and ALM_8.
S7-1200 PLCs do not have a message system.
It does not support messages for S7-1500. Next review.
Major