Reference Manual
00809-0100-4697, Rev EA
October 2011
3-11
Rosemount 848T
Out of Service (OOS)
The block is not processing its tasks. When the resource block is in OOS,
all blocks within the resource (device ) are forced into OOS. The
BLOCK_ERR parameter shows Out of Service. In this mode, changes can
be made to all configurable parameters. The target mode of a block may
be restricted to one or more of the supported modes.
Alarm Detection
A block alarm will be generated whenever the BLOCK_ERR has an error bit
set. The types of block error for the resource b lock are defined abo ve. A write
alarm is generated whenever the WRITE_LOCK parameter is cleared. The
priority of the write alarm is set in the following parameter:
•WRITE_PRI
Table 3-4. Alarm Priority Levels
Status Handling
There are no status parameters associated with the resource block.
PlantWeb™ Alerts The alerts and recommended actions should be used in conjunction with
“Operation and Maintenance” on page 4-1.
The Resource Block will act as a coordinator for PlantWeb alerts. There will
be three alarm parameters (FAILED_ALARM, MAINT_ALARM, and
ADVISE_ALARM) which will contain information regarding some of the device
errors which are detected by the transmitter software. There will be a
RECOMMENDED_ACTION parameter which will be used to display the
recommended action te xt for the highest prior ity alarm and a HEALT H_INDEX
parameters (0 - 100) indicating the overall health of the transmitter.
FAILED_ALARM will have the highest priority followed by MAINT_ALARM
and ADVISE_ALARM will be the lowest priority.
FAILED_ALARMS
A failure alarm indicates a failure within a device that will make the device or
some part of the device non-oper ational. This implies that the device is in
need of repair and must be fixed immediately. There are five parameters
associated with FAILED_ALARMS specifically, they are described below.
FAILED_ENABLED
This par ameter contains a list of failures in the device which makes the
device non-operational that will cause an alert to be sent. Below is a list of
the failures with the highest priority first.
Number Description
0The priority of an alarm condition changes to 0 after the condition that caused the
alarm is corrected.
1An alarm condition with a priority of 1 is recognized by the system, but is not
reported to the operator.
2An alarm condition with a priority of 2 is reported to the operator, but does not
require operator attention (such as diagnostics and system alerts).
3-7 Alarm conditions of priority 3 to 7 are advisory alarms of increasing priority.
8-15 Alarm conditions of priority 8 to 15 are critical alarms of increasing priority.