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4.4 User Function Block for Slave Data Input/Output
4
4.4.4 Slave data output (Asynchronous mode only)
(1) Function
During operation in asynchronous mode, output data to a specified slave device is written
in the output data area (bit strobe or polling) of the DN311.
(2) Diagrammatic Representation (Function block)
ASWRITE_DT Structural data typeSlave device output data
ASWRITE_DT structure:
WDAT[0] WORD type Slave device output data 1
WDAT[1] WORD type Slave device output data 2
WDAT[2] WORD type Slave device output data 3
WDAT[3] WORD type Slave device output data 4
WDAT[4] WORD type Slave device output data 5
WDAT[5] WORD type Slave device output 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.
NODE UINT type Node address
BS WORD type Bit strobe selection
1: Bit strobe 0:
Polling
ASWRITE_
DT
Data
structural type
Output data to
slave device
DN_ASWRITE
CH
REQ
UNIT
NODE
SLOT
ASWRITE_DT
DONE
ERR
BS
STATUS
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