Flowserve MX/QX Profibus DP/PA Field Unit - Manual (Page 75)

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PB DPV1 / PA Field Unit Installation and Maintenance FCD LMENIM2336-03 – 12/12
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Standard Parameters and Objects
Parameter Description
Block Object
(Index 16)
This object applies to every block and is placed before the first
parameter. It contains the characteristics of the block, e.g., block
type and profile number.
Static Revision
Parameter (ST_REV)
(Index 17)
The value of the static revision parameter may be used by a
configuration device to determine if a block parameter(s) stored in
static memory has changed in value. A change in a static parameter
will cause the static revision parameter of the associated block to be
incremented.
Tag Description
Parameter (TAG_DESC)
(Index 18)
The tag description is a user-supplied description of the block.
Strategy Parameter
(STRATEGY)
(Index 19)
The strategy parameter has a user-supplied value. This assigned
value may be used in configuration or diagnostics as a key in sorting
block information.
Alert_Key Parameter
(ALERT_KEY)
(Index 20)
The Alert_Key parameter has a user-assigned value which may be
used in sorting alarms or events generated by a block.
Target Mode Parameter
(TARGET_MODE)
(Index 21)
The target mode attribute indicates what mode of operation is
desired for the block. It is normally set by a control application or by
an operator.
Mode Parameter
(MODE_BLK)
(Index 22)
The mode parameter is a structured parameter composed of the
actual mode, the normal mode and the permitted mode. The actual
mode is set by the block during its execution to reflect the mode
during execution. The normal mode is the desired operating mode
of the block. The permitted mode shows which changes of the target
mode are valid for the specific block to the remote user.
Execution of a function block, physical block or transducer block will be controlled by the mode
parameter. Mode sub-index values are defined as follows:
1. Target – This is the mode requested by the operator. Only one mode from those allowed by the
permitted mode parameter may be requested.
2. Actual – This is the current mode of the block, which may differ from the target based on
operating conditions. Its value is calculated as part of block execution.
3. Permitted – Defines the modes which are allowed for an instance of the block. The permitted
mode is configured by the block design group, i.e., is defined for every block in the according
data sheet. Any mode change request will be checked by the device to ensure that the request
target is defined as a permitted mode.
4. Normal – This is the mode to which the clock should be set during normal operating conditions. This
parameter may be configured and read by an interface device but is not used by the block algorithm.
Parameter Description
Alarm Summary
Parameter (ALARM_SUM)
(Index 23)
The parameter alarm summary summarizes the status of up to 16
block alarms. For each alarm, the current states, unacknowledged
states, unreported states and disabled states are maintained.