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model 2000 DeviceNet Module Manual (DN611/DN611A)
Chapter 4 Operating Procedures for the DN611 (Software)
4
(a) Use this function block when the DN611 is in run mode.
(b) When REQ is TRUE, data is input and output to and from the DN611 specified by
CH, UNIT, and SLOT. Data from two or more slave devices can be sent or
received because an input/output data area can be specified.
(c) Of the output data to the slave device written in WRITE_DT, the number of words
corresponding to N_WPOL are written in the polling output data area of the
DN611 and 4 words (fixed) in its bit strobe output data area.
WPOL[0] to WPOL[377] amd WBS[0] to WBS[3] correspond to the polling output
data area/bit strobe output data areas as shown in the table below.
Write them as appropriate to the specifications of the slave devices you are
using.
(d) Of the data input to a slave device and read into the polling/bit strobe input data
area of the DeviceNet module, the number of words corresponding to N_RPOL
are read to READ_DT.
RPOL[0] to RPOL[127] corresponding to the polling/bit strobe input data areas as
shown in the table below.
Table 4.17 READ_DT Composition
(e) This function block operates as described in the table below depending on the
DN611 operation mode (synchronous/asynchronous, polling/bit strobe).
Table 4-16 WRITE_DT Composition
Output Data Output Area Address
WPOL[0] 017AH
~ ~
WPOL[377] 02F3H
WBS[0] 02F4H
~ ~
WBS[3] 02F7H
Input Data Input Area Address
RPOL[0] 0H
~ ~
RPOL[377] 0179H
Table 4-17 Operation of Input/Output Data Area Batch Access Function Block
Data transfer
between S
controller and
DN611
Polling/Bit Strobe Function Block Operation
Asynchronous Polling • Output data write in polling output data area
• Input data read from polling/bit strobe input data area
Synchronous Polling • Output data write in polling output data area
• Data exchange with slave device using polling output
data semaphore and input data semaphore
• Input data read from polling/bit strobe input data area
Asynchronous Bit strobe • Output data write in polling output data area
• Input data read from polling/bit strobe input data area
Synchronous Bit strobe • Output data write in bit strobe output data area
• Data exchange with slave device using bit strobe output
data semaphore and input data semaphore
• Input data read from polling/bit strobe input data area
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