group
group — creates
a point of type group.
Synopsis
(group enable_flag name address read_write_mode cycle_millisecs point ...)
Parameters
- enable_flag
- The initial value of enabled status of the point.
t will cause the
point to be initially enabled. f will cause the
point to be initially disabled. (see enable and
disable
commands).
- name
- The name of the group.
- address
- The address of the group, if required. Some
devices require an associated address for reading or writing a
block of data. For many cards this value is zero.
- read_write_mode
- R,
W, or RW
(case-insensitive) to specify the group as read-only,
write-only, or read-write respectively. Write-only
points cannot be added to a group with read-only or
read-write attributes. When a writeable point is
added to a writeable group, any changes to the point's
value do not take effect until the group is written
(points are normally written immediately). It is very
uncommon to have a read-write group.
- cycle_millisecs
- 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.
- exception_flag
- If set, the point is registered for exceptions
with the Cascade DataHub (if active).
- point ...
- A list of point names to be included in the
group
Description
This command creates a point of type group. This is an
internal type for grouping points together for reading and writing.
This command is normally executed from the configuration
file.
Example
(group t Digital-Inputs 0 r 100 Pushbutton Button 2 Button 3)
(group t Lights 0 w 100 red-light green-light blue-light)
