Omron CS1W-DRM21, CJ1W-DRM21 operation manual Scan List Contents

Scan List Section 4-2

nect/Connect Switch for that slave (words n+6 to n+9). This can be done when a slave is replaced or to register a slave in the scan list in prepara- tions to connect it to the network at a later time. The Disconnect/Connect Switches, however, are cleared when the power supply is turned OFF, so the bit must be turned back ON from the ladder program after the power turns ON in order for it to remain effective.

2. Use Configurator Ver. 2.10 or later for the CJ1W-DRM21.

4-2	Scan List
		A scan list is used to register the slaves with which the Master Unit communi-
		cates in DeviceNet remote I/O communications. It is the basis on which the
		Master Unit communicates with slaves.
		The Master Unit does not contain a scan list by default. The CS/CJ-series
		DeviceNet Unit, however, has a default setting that allows it to communicate
		with all slaves even with the scan list disabled, but this operating mode should
		not be used for normal operation. Always create a scan list prior to operating
		the Unit.
Scan List Contents		The contents of the scan list is listed in the following table. When a Master
		Unit goes online, it compares each of these items with the slaves that are
		actually connected to the network. The items that are compared, however, will
		depend on the allocation method that is used.
	Item	Description	Fixed allocations	User-set allocations	User-set allocations
				using allocated DM	from the
				Area words	Configurator
Node address		Node address for	Compared		Compared
		every Slave
Allocated IN/OUT		Settings of the num-	Compared		Compared
sizes and allocation		ber of bytes allocated
		to every slave in a data
		area of the Master Unit
Vendor		Unique manufacturer	Not compared		Set from Configurator
		ID
Device type		Unique product type	Not compared		Set from Configurator
		value
Product code		Unique product model	Not compared		Set from Configurator
		value
Connection type		Applicable DeviceNet	Automatically set		Automatically set or
		protocol			set from Configurator
		(See Appendix B
		DeviceNet Connec-
		tions for details.)
Connection path		Type of slave I/O data	Cannot be set		Set from Configurator
		(See Appendix B
		DeviceNet Connec-
		tions for details.)

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