Omron DR 170 14 manual DAServer Device-Group-Specific System Items, Range

Klinkmann Automation Omron Ethernet DAServer 47

DAServer Device-Group-Specific System Items

The following system items refer to specific information regarding device groups that have been configured in the DAServer.

System Item	Type/	Description	Values
Name	Access
	Rights
$SYS$UpdateInterval	DWord/	Used to access the currently	RANGE:
	ReadWrite	set update interval. It is the	1…2147483647
		current update interval of the	0: Topic inactive,
		device group in milliseconds.	no items are
		A client can poke new values	updated. Data
		into this item.	acquisition is
		The value of zero indicates	stopped.
		that no non-system items on	>0: Expected
		that topic are updated (data	updated interval
		for these items are not	for the set of all
		acquired from the device).	items in the
			device group.
$SYS$MaxInterval	DWord/	Used to access the currently	RANGE:
	Read	measured maximum update	0…2147483647
		interval in milliseconds of all	0: If update
		items of the corresponding	interval is 0 or if
		device group. This item is	the status is
		read-only. The value of the	false.
		slowest item is displayed.	>0: Measured
			update interval
$SYS$WriteComplete	Integer/	Used to access the state of	RANGE: -1, 0, 1
	ReadWrite	pending write activities on the	1: Write
		corresponding device group.
		On device group creation	complete (no
		(adding items to an OPC	writes are
		group), the value of this	pending – initial
		system item is initially 1,	state).
		indicating all write activities	0: Writes are
		are complete – no pokes are	pending.
		pending.	-1: Writes
		If values are poked into any	completed with
		items of the device group, the	errors.
		value of this item changes to
		0, indicating write activity is
		currently in progress.
		If the server has completed all
		write activities, the value of
		this item changes to 1 if all
		pokes were successful or to -1
		if at least one poke has failed.
		If the value of this item is not
		zero, the client can poke 1 or -
		1 to it (poke a 1 to clear errors,

Omron Ethernet DAServer Ver 1.x User Manual Rev 1.3 17014m13