ACC Programmer's Reference Guide

Chapter 3 113
ZCOM Tables and Data Structures
Message Header
MRQLEN -Datalength
Thisisthetotallengthofthedatatobesent,orthelengthofdata
received, in this message.
System Event Message (zevent_type)
A System Event Message (SEM) is a special message generated by the
ZCOM subsystem to represent an alarm condition or type of event that
has occurred within the ZC OM subsystem. Applications may request
that ZCOM deliver these events to a program ZLU by issuing a
zevent_rcvr call. A SEM is returned to the application as a normal data
message with a message type of ZCOM_MSTYPE_LSEM (5) or
ZCOM_MSTYPE_RSEM (13). See the zevent_rcvr routine for addition
details.
The structure used to hold the system event messages is composed of a
fixed header structure and a variable part that is specific to the type of
event. See Table 3-40.
SETYPE - System Event Type
This field contains the type of event represented by this message.
Currently there are three defined types of events; a node status event
(ZCOM_SETYPE_NODE), a card status change event
(ZCOM_SETYPE_CARD), and a dynamic reconfiguration event
(ZCOM_SETYPE_RECONFIG). The format of the variable part of the
message is dependent on the event type.
SEFLAG - Event fla gs (currently not used)
This field is currently not used. It is intended to contain global
information on the event (e.g. event priority, etc).
Table 3-40 System Event Message (zevent_type) Structure
Field Name Field Description Field Type Size
(Bytes)
SETYPE System Event Type uns.char 1
SEFLAG Event flags (currently not used) uns.char 1
SENODE Node where event was generated uns.short 2
SETIME Time when the event occurred uns.int 4
SEDATA Event specific data union struct 8