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Configuration
September 2018
2.3
General block information
2.3.1
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 Emerson.com/Rosemount. The initial release of the
Rosemount 644 with F
2.3.2
Node address
The transmitter is shipped at a temporary (248) address. This will enable F
systems to automatically recognize the device and move it to a permanent address.
2.3.3
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
6
Fieldbus is device revision 1.
OUNDATION
Reference Manual
00809-0400-4728, Rev CA
Fieldbus host
OUNDATION
Reference
Manual.
Configuration
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