Filter
Top Products
Reference Manual
00809-0100-2230, Rev BB
August 2014
4-27
Rosemount 2230
Section 4. Configuration and Operation
4.12 RESOURCE BLOCK
4.12.1 FEATURES and
FEATURES_SEL
The FEATURES parameter is read only and defines which features are
supported by the 2230. Below is a list of the FEATURES the 2230 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
2230 is HARD W LOCK. Choose one or more of the supported features if any.
UNICODE
All configurable string variables in the 2230, 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 2230 supports alert reports. The Reports option bit must be set in the
features bit string to use this feature. Then, the transmitter will actively report
alerts. If it is not set, the host must poll for alerts.
MULTI-BIT ALARM
The 2230 supports Multi-bit alarms. With the multi-bit option enabled each
condition may send a message when it occurs and when it clears so that
there is no masking of active conditions.
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, and the 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
shall be rejected.