Emerson Rosemount 5900C, Reference Manual

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Table 4-11: Write_Lock Parameter
(continued)
FEATURE_SEL
HARDW_LOC
K bit FEATURE_SEL
SOFTW_LOCK
bit SECURITY
SWITCH WRITE_LOCK WRITE_LOCK
Read/Write Write access
to blocks
0 (off) 1 (on) NA 2 (locked) Read/Write None
1 (on) 0 (off)
(1)
0 (unlocked) 1 (unlocked) Read only All
1 (on) 0 (off) 1 (locked) 2 (locked) Read only None
(1) The hardware and software write lock select bits are mutually exclusive and the hardware select
has the highest priority. When the HARDW_LOCK bit if set to 1 (on), the SOFTW_LOCK bit is
automatically set to 0 (off) and is read only.
4.13.2 MAX_NOTIFY
The MAX_NOTIFY parameter value is the maximum number of alert reports that the
resource can have sent without getting a confirmation, corresponding to the amount of
buffer space available for alert messages. The number can be set lower, to control alert
flooding, by adjusting the LIM_NOTIFY parameter value. If LIM_NOTIFY is set to zero, then
no alerts are reported.
4.13.3 Field diagnostic alerts
The Resource Block acts as a coordinator for Field Diagnostic alerts. There are four alert
parameters (FD_FAIL_ALM, FD_OFFSPEC_ALM, FD_MAINT_ALM, and FD_CHECK_ALM)
which contain information regarding some of the device errors which are detected by the
transmitter software.
There is a FD_RECOMMEN_ACT parameter which is used to display the recommended
action text for the highest priority alarm. FD_FAIL_ALM has the highest priority followed
by FD_OFFSPEC_ALM, FD_MAINT_ALM, and FD_CHECK_ALM which has the lowest
priority.
Failure alerts
A Failure alert indicates a condition within a device that will make the device or some part
of the device non-operational. This implies that the device is in need of repair and must be
fixed immediately. There are five parameters associated with Failure alerts specifically,
they are described below.
FD_FAIL_MAP
This parameter maps conditions to be detected as active for this alarm category. Thus the
same condition may be active in all, some, or none of the four alarm categories. The
parameter contains a list of conditions in the device which makes the device non-
operational that will cause an alarm to be sent. Below is a list of the conditions with the
highest priority first. This priority is not the same as the FD_FAIL_PRI parameter described
below. It is hard coded within the device and is not user configurable.
1. Software Incompatibility Error
2. Memory Failure - FF I/O Board
Configuration Reference Manual
September 2019 00809-0100-5901
172 Reference Manual