EMS Manual

EMS Manual—426909-005
19-1
19
Collector Commands and
Responses
Both the basic and extended SPI interfaces support commands that let you manage
and monitor the operational environment of the primary and alternate collectors and
the compatibility distributor.
These interfaces let your application program send a command to or request
information from a primary or alternate collector. The interfaces also let you interact
indirectly (through $0) with the compatibility distributor.
This section describes the command and response messages for the EMS primary and
alternate collectors:
SPI Command and Response Buffers
Commands are sent to a collector in an SPI command buffer. Responses are returned
in an SPI response buffer. A maximum of 127 application programs can have the
$ZSPI interface to a collector open at the same time.
Figure 19-1
illustrates the interaction between a management application and a
collector.
SPI command and response buffers consist of tokens. A variety of tokens is associated
with the SPI commands. Some of these tokens are required; some are not.
Topic Page
SPI Command and Response Buffers
19-1
Sending a SPI Command 19-2
Summary of EMS Collector Commands 19-2
Common Definitions of ZCOM- Commands 19-4
Common Definitions of ZEMS- Commands 19-27
Collector Command Descriptions 19-29
Figure 19-1. Use of SPI Command and Response Buffers
SPI Command Buffer
SPI Response Buffer
Management
Application
Primary
or Alternate
Collector
VST010.vsd