7
Reference Manual
00809-0100-4772, Rev FA
March 2016
2.5
General block information
Reference information on the process control function blocks can be found in the Function
Block manual document number 00809-0100-4783.
2.5.1
Modes of operation
The Resource, Transducer, and all other 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.
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 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 flowmeter. For more information, see the Function Block
manual, document 00809-0100-4783.
Note
When an upstream block is set to OOS, the output status of all downstream blocks will be
affected. The figure below depicts the hierarchy of blocks.
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.
Resource Block
Transducer
Block
Analog Input
(AI Block)
Other
function
blocks
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