National Instruments NI-FBUS - Manual (Page 51)

Chapter 2 Using the NI-FBUS Configurator
NI-FBUS Configurator User Manual 2-28 ni.com
OOS mode. After the configuration downloads, you must set the blocks
back to their normal mode of operation to begin operating.
Download Options
There are several options in the download configuration dialog box for
downloading a configuration.
Write Contained Block Parameters
Write Contained Block Parameters writes all contained parameters
(parameters that are internal to the function block, such as the scaling
and alarm limit settings) from the block configuration windows. This is
especially useful if you are changing parameters in multiple function
blocks and do not want to take the time to write them block by block.
Note Per the Foundation Fieldbus specification, some contained parameters have default
values that are not legal values. This is done to encourage users to change these parameters
to values appropriate for their process. Often, device manufacturers will allow their devices
to operate with uninitialized parameter values, but any attempts to rewrite the uninitialized
value to a parameter will result in an error. As a result, using Write Contained Block
Parameters generates errors if any parameters are left uninitialized. Such errors can be
cleared by writing a legal value to the parameter or by reading into the NI-FBUS
Configurator the value from the device. Generally, such errors are non-fatal and the
download can continue successfully.
Clear Devices
Clear Devices clears the existing configuration in the devices before
downloading. It is good practice to use this option. Using this feature
ensures that the linkages you see in the Function Block Application Editor
window are the only linkages in the device. Otherwise, linkages from a
previous download may persist.
Automatic Mode Handling
Automatic Mode Handling automatically takes the blocks OOS as needed
during the download process and returns them to their normal modes of
operations (as read from
MODE_BLK.NORMAL for each block) after the
configuration is downloaded. This is a time-saving and convenience
feature. If this option is not checked, you will be prompted to take the
blocks to
OOS as needed and will have to set them back to NORMAL by hand
after the download completes.