Resource Block; Features And Features_Sel - Emerson Rosemount 5900S Series Reference Manual

Rosemount 5900S Series

4.13 RESOURCE BLOCK

4.13.1 FEATURES and
FEATURES_SEL
4-50
The FEATURES parameter is read only and defines which features are
supported by the 5900S. Below is a list of the FEATURES the 5900S
supports.
FEATURES_SEL is used to turn on any of the supported features that are
found in the FEATURES parameter. The default setting of the Rosemount
5900S is HARD W LOCK. Choose one or more of the supported features if
any.
UNICODE
All configurable string variables in the 5900S, except tag names, are octet
strings. Either ASCII or Unicode may be used. If the configuration device is
generating Unicode octet strings, you must set the Unicode option bit.
REPORTS
The 5900S supports alert reports. The Reports option bit must be set in the
features bit string to use this feature. If it is not set, the host must poll for
alerts. If this bit is set, the transmitter will actively report alerts.
SOFT W LOCK and HARD W LOCK
Inputs to the security and write lock functions include the hardware security
switch, the hardware and software write lock bits of the FEATURE_SEL
parameter, the WRITE_LOCK parameter, and the DEFINE_WRITE_LOCK
parameter.
The WRITE_LOCK parameter prevents modification of parameters within the
device except to clear the WRITE_LOCK parameter. During this time, the
block will function normally updating inputs and outputs and executing
algorithms. When the WRITE_LOCK condition is cleared, a WRITE_ALM
alert is generated with a priority that corresponds to the WRITE_PRI
parameter.
The FEATURE_SEL parameter enables the user to select a hardware or
software write lock or no write lock capability. To enable the hardware security
function, enable the HARDW_LOCK bit in the FEATURE_SEL parameter.
When this bit has been enabled the WRITE_LOCK parameter becomes read
only and will reflect the state of the hardware switch.
In order to enable the software write lock, the SOFTW_LOCK bit must be set
in the FEATURE_SEL parameter. Once this bit is set, the WRITE_LOCK
parameter may be set to "Locked" or "Not Locked." Once the WRITE_LOCK
parameter is set to "Locked" by the software lock, all user requested writes as
determined by the DEFINE_WRITE_LOCK parameter shall be rejected.
The DEFINE_WRITE_LOCK parameter allows the user to configure whether
the write lock functions (both software and hardware) will control writing to all
blocks, or only to the resource and transducer blocks. Internally updated data
such as process variables and diagnostics will not be restricted by the
security switch.
The following table displays all possible configurations of the WRITE_LOCK
parameter.
Reference Manual
00809-0100-5900, Rev CA
June 2014
Section 4. Configuration