Owner`s manual

M SERIES DAC
BASE UNIT AND MODULE OPERATION
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The Sample (SA) command instructs the V78 CRM-1 to read and report a the open or
closed status for each relay specified. The Sample command has the following
format:
SAn<cr>
where n = Relay# (1 to 8 or 0 for all).
DE-ENERGIZE RELAY COMMAND
The De-energize Relay (DR) command instructs the V78 CRM-1 to de-energize the
specified relay(s). The De-energize Relay command has the following format:
DRn<cr>
where n = Relay# (1 to 8 or 0 for all).
ENERGIZE RELAY COMMAND
The Energize Relay (ER) command instructs the V78 CRM-1 to energize the
specified relay(s). The Energize Relay command has the following format:
ERn<cr>
where n = Relay# (1 to 8 or 0 for all).
DATA MESSAGE GENERATION AND RELAY CONTROL
A host computer/controller connected to a V71 or V96 host module may receive data
messages and control individual relays on a V78 CRM-1 module. Data message
generation depends on the Reporting Method used. When using Immediate Reporting
Method, the V78 CRM-1 will generate an event data message whenever a change-in-
state of a relay occurs (i.e., energized to de-energized or vice versa). When using
Schedule Reporting Method, the V78 CRM-1 will generate an event data message
whenever a change-in-state of a relay occurs after the Report Start Time has elapsed .
When using Command Reporting Method, the V78 CRM-1 will generate an event
data message using the RAn<cr> or RSn<cr> commands only.
Regardless of the Reporting Method used, the host system may obtain a data message
showing the present state of a relay by sending the SAn<cr> command or clear the
buffer of a relay by sending the CBn<cr> command.
Individual relays may be controlled directly by a host computer/controller via
command, by schedule, or both. When relays are controlled using a schedule, each