(heartbeat enable_flag name cycle_millisecs expression)
The name of the heartbeat point.
The cycle (or heartbeat) time in milliseconds associated with the group, upon which automatic reading or writing is performed. Typically, points are read or written in groups, and the individual cycle time for each point is set to 0.
(optional parameter) A string defining the expression to be evaluated on each cycle. The expression consists of one or more commands as defined in this section. If no expression is supplied, then the default behavior is to increment a variable in the Cascade DataHub of the same name as the heartbeat.
This command creates a point of type heartbeat, used to trigger processing on a timed-interval basis. It is normally executed from the configuration file.
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