6F8C0903
83
4.4 User Function Block for Slave Data Input/Output
4
4.4.1 Input/output data area batch access
(1) Function
This is to write output data from the area (WRITE_DT) provided for the controller in
the polling output data area and bit stroe outputt data area of the DN311. If the data
is for polling, specify a data size in the rangge of 1 to 128 words; if it is for bit strobe,
the data size is fixed at 4 words.
Input data is also copied from the polling/bit strobe input data area of the DN311 into
the area (READ_DT) provided by the S controller. Specify a data size in the range of
1 to 128 words.
(2) Diagrammatic representation (Function block)
WRITE_DT Structural data type Output data to slave device
WRITE_DT structure:
WPOL[0] WORD type Polling output data (0)
WPOL[1] WORD type Polling output data (1)
~~ ~
WPOL[127] WORD type Polling output data (127)
WBS[0] WORD type BS output data (0)
WBS[1] WORD type BS output data (1)
WBS[2] WORD type BS output data (2)
WBS[3] WORD type BS output data (3)
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 Station status
SLOT WORD type Slot No. READ_DT Data structural
type
Input data from
slave device
N_RPOL UINT type No. of polling input
words
N_WPOL UINT type No. of polling
output words
WRITE_DT Data
structural type
Output data to
slave device
DN_SLAVERW
CH
REQ
UNIT
SLOT
DONE
ERR
WRITE_DT
READ_DT
N_WPOL
N_RPOL
STATUS
To Next Page
Loading...
