Emerson Rosemount 2230, Reference Manual

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Reference Manual
00809-0100-2230, Rev CA
Configuration and Operation
July 2017
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 Rosemount 2230.
Below is a list of the FEATURES the Rosemount 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 Rosemount 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 Rosemount 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 Rosemount 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.
Table 4-6 on page 63 displays all possible configurations of the WRITE_LOCK parameter.