Read Element Status
182 SL150 Interface Reference Manual Julyl 2017
Starting Element Address
This field specifies the minimum element address to report. Only elements
with an element address greater than or equal to the Starting Element
Address are reported.
Element descriptor blocks are not generated for undefined element
addresses.
The Starting Element Address is set to a valid address for the library but
does not have to be an address of the type requested in the Element Type
Code.
Number of Elements
This field represents the maximum number of element descriptors to be
transferred. This is an actual number of element descriptors to be
transferred, not an element address range.
CurData
The current data bit specifies that the library shall return element status
data without causing device motion.
0 = Library operations are normal, and library mechanics may become
active if needed to gather element static data.
1 = The library is responding with data only; no mechanical operations are
active
The CurData bit is effectively ignored by the library. The library will
perform or not perform mechanical operations to obtain proper
information at it’s discretion independently of the setting of this bit.
DvcID
The device identification bit indicates whether the return data will contain
device identification information.
0 = The library will not return device identification information.
1 = The library will return device identification information only for data
transfer elements.
Allocation Length
This field specifies the length in bytes of the space allocated by the
initiator for the transfer of element descriptors. Only complete element
descriptors are transferred. Element descriptors are transferred until one of
the following conditions is met:
All available element descriptors of the type specified in the Element Type
Code have been transferred.
The number of element descriptors specified in the Number of Elements
field have been transferred.
There is less allocation length space available than required for the next
complete element descriptor or header to be transferred.
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