Owner's manual

Table Of Contents
3-24 Equipment-to-Host Messages
3.4.9 Disk Files
The Equipment maintains a disk file which contains the current equipment constant settings. The file is
updated each time the Operator or Host changes an equipment constant. The most recent settings for some
of the equipment constants are read from the file when the Equipment is powered-on.
All Event Report definitions, links, and enable status as well as Limits attributes are also maintained on
separate disk files.
3.4.10 Related Variables
The following table lists the variables (SVs, ECs, or DVs) which are relevant to data collection setup and
maintenance. This section does not list the variables which contain Equipment-specific information. For a
more complete description of specific variables, refer to Appendix A.
Table 3-16 Data Collection / Setup Variables
Variable Name VID
ECIDCHANGE 67
3.4.11 Related Events
The following lists the collection events (CEIDs) which are relevant to data collection. In addition to
these, each variable which is eligible for limits monitoring must have a specific collection event
associated with it. For a more complete description of these events, refer to Appendix B or the description
in this section.
Table 3-17 Data Collection CEIDS
Collection Event CEID
EqConstChange 20
3.5 Alarm Management
The Equipment has a fixed set of alarm conditions which can occur. Each alarm is identified by a unique
Alarm ID (ALID), and has an associated severity code (ALCD) and alarm text (ALTX). Examples of
possible alarms are shown in Appendix C.
3.5.1 Alarm States
Each alarm (ALID) can be in either of two states: CLEAR (off) or SET (on). Several alarms can be SET
simultaneously. At power-up, all Alarms are cleared.