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4.3 Requests to the DN611
4
4.3.6 RAS Information read request
(1) Function
This request reads the DN611's RAS information from the S controller. There are
three kinds of RAS information read by this request: RAS history counter, event
history, and execution node information (slave device execution information
possessed by the DN611). The RAS information can be read anytime unless the
DN611 is in initialize mode.
The contents of RAS data read are explained in 6.3 RAS Information Read Data.
(2) Diagrammatic representation (Function block)
(3) Description of operation
(a) When REQ is TRUE, the module specified by CH, UNIT, and SLOT executes the
read request.
(b) The RAS information specified by RETYPE, POSITION, and N is output beginning
with the top of RAS_DT 0 is output where RAS information is not output.
(c) RAS_DT is described in the next item.
(d) After the RAS information read, DONE is turned TRUE.
(e) If the request processing is not completed in 2 seconds or more due to an error or
the like, ERR and DONE are turned TRUE.
(f) Completion status is output to STATUS.
(g) If REQ is FALSE, both DONE and ERR turn FALSE.
(h) When this function block is started (when REQ is turned TRUE), keep REQ
TRUE till DONE becomes TRUE.
Input Argument Output Argument
REQ BOOL type Execution enabled DONE BOOL type Completed
CH WORD type Channel No. ERR BOOL type Error
UNIT WORD type Unit No. STATUS WORD type Completion
SLOT WORD type status WORD
type
RAS_DT Structural
data type
RAS information
read data
REQTYPE WORD type Type of request
information type
POSITION WORD type Read start position For description of completion status, see
Section 4.5
N WORD type Read quantity
DN_RASREAD
CH
REQ
DONE
UNIT
POSITION
REQTYPE
SLOT
ERR
N
READ_DT
STATUS
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