Manual

Operating Characteristics 3-23
S6F21 Host requests an Annotated Event Report associated with a Report
ID.
GWGEM automatically processes Event Report related messages.
FmNT indicates to GWGEM that an event has occurred, using GemNoteEvent.
GWGEM handles Event Reports, and may invoke FmNT Variable access functions
([RefGWGEMUser] p 85 ‘Event Reporting’). The GEM configuration file maintains
the name of the event report file in the GemReportFileName Equipment Constant.
3.4.6 Time Driven Trace
The GES-1993 supports Time Driven Trace initiated from the Host. The Host
initializes a trace using S2F23. The Equipment will send the data requested after the
specified time interval has expired. The data will be sent using the S6F1 (Trace Data
Send) message.
The Equipment can handle several concurrent traces. The number of concurrent
traces is determined by the size of the trace data requested. The Equipment can
support at least four concurrent traces to a maximum size (i.e. all variables
requested).
The equipment allows Host definition of trace data to exceed the one-block limit
when reported. That is, the SEMI E5 standard states that the S6F1 (Trace Data
Send) message is limited to a single SECS block; but the Equipment will allow this
point to be overlooked at the Host's request. If the Host does define trace data to be
larger than one SECS block, then the Equipment will send the multiple blocks, not
preceded by the S6F5/S6F6 Inquire/Grant scenario.
GWGEM automatically processes Time Driven Trace messages, and may also
invoke FmNT Variable access functions ( [ RefGWGEMUser ] p 86 ‘Time Driven
Trace’ ).
3.4.7 Limits Monitoring
The Host can define limits for various Variables on the GES-1993. When the
appropriate limits transitions occur, the GES-1993 will report this occurrence by
sending an event to the Host (if the event is enabled). The Host may define limits for
a particular Variable through the S2F45 (Define Variable Limit Attributes).
Through this message, the Host may define up to seven limits for each eligible
Variable. For each limit (LIMITID), the Host defines an UPPERDB and a
LOWERDB. The GES-1993 generates events when a transition across these
boundaries occurs. The Host may set the rate at which the GES-1993 polls the
Variables to determine if a limit has been crossed by setting the
GEMLIMITSTIMER variable (VID 65).