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4.4 User Function Block for Slave Data Input/Output
4
4.4.3
Slave data input (Asynchronous mode only)
(1) Function
During operation in asynchronous mode, input data to a specified slave device is
read from the input data area of the DN611.
(2) Diagrammatic Representation (Function block)
ASREAD_DT
Structural data type Slave device input data
ASREAD_DT structure:
RDAT[0]
WORD type
Slave device input data 1
RDAT[1]
WORD type
Slave device input data 2
RDAT[2]
WORD type
Slave device input data 3
RDAT[3]
WORD type
Slave device input data 4
RDAT[4]
WORD type
Slave device input data 5
RDAT[5]
WORD type
Slave device input data 6
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.
ASREAD_
DT
Data
structural type
Input data from
slave device
NODE
UINT type
Node address
BS
WORD type Bit strobe selection
1: Bit strobe
0: Polling
DN_ASREAD
CH
REQ
UNIT
ASREAD_DT
SLOT
NODE
DONE
ERR
STATUS
BS