Emerson 644 manual General Block Information, Device Description Node Address, Modes, Auto, Man

Rosemount 644

Reference Manual

00809-0400-4728, Rev AA June 2011

GENERAL BLOCK INFORMATION

Device Description

Before configuring the device, ensure the host has the appropriate Device Description file revision for this device. The device descriptor can be found on www.rosemount.com. The initial release of the Rosemount 644 with FOUNDATION fieldbus protocol is device revision 1.

Node Address

The transmitter is shipped at a temporary (248) address. This will enable

FOUNDATION fieldbus host systems to automatically recognize the device and move it to a permanent address.

Modes	The Resource, Transducer, and all function blocks in the device have modes
	of operation. These modes govern the operation of the block. Every block
	supports both automatic (AUTO) and out of service (OOS) modes. Other
	modes may also be supported.
	Changing Modes
	To change the operating mode, set the MODE_BLK.TARGET to the desired
	mode. After a short delay, the parameter MODE_BLOCK.ACTUAL should
	reflect the mode change if the block is operating properly.
	Permitted Modes
	It is possible to prevent unauthorized changes to the operating mode of a
	block. To do this, configure MODE_BLOCK.PERMITTED to allow only the
	desired operating modes. It is recommended to always select OOS as one of
	the permitted modes.
	Types of Modes
	For the procedures described in this manual, it will be helpful to understand
	the following modes:
	AUTO
	The functions performed by the block will execute. If the block has any
	outputs, these will continue to update. This is typically the normal
	operating mode.
	Out of Service (OOS)
	The functions performed by the block will not execute. If the block has any
	outputs, these will typically not update and the status of any values passed
	to downstream blocks will be “BAD.” To make some changes to the
	configuration of the block, change the mode of the block to OOS. When
	the changes are complete, change the mode back to AUTO.
	MAN
	In this mode, variables that are passed out of the block can be manually
	set for testing or override purposes.
	Other Types of Modes
	Other types of modes are Cas, RCas, ROut, IMan, and LO. Some of these
	may be supported by different function blocks in the 644. For more
	information, see the Function Block manual (document number
	00809-0100-4783).

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