Reference Manual
Rosemount 3051S
GENERAL BLOCK
INFORMATION
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 Rosemount3051S. |
| For more information, see the Function Block manual, document |
| |
|
|
| NOTE |
| When an upstream block is set to OOS, this will impact the output status of all |
| downstream blocks. The figure below depicts the hierarchy of blocks: |
|
|
Resource
Block
Transducer
Block
Analog Input (AI Block)
Other
function
blocks