User`s manual

10-9
Data link DL1 (master station) function
10
[2] PC process and communication timing
The data link DL1 communicates asynchronize with master station PC (JW-32CUM1) and slave station
PC. To exchange data between DL1 buffer memory and each of PC data memory, synchronize with the
PC process.
Configuration of data link DL1 master station (JW-32CUM1)
JW-32CUM1
Receiving
Sending
SIO
Buffer
memory
CPU2
Data
bus
Data
memory
CPU1
I/O module
General purpose communication section
(data link DL1 master station)
Control section
Buffer memory: Stores output data and input data from general communication section.
CPU2: This is a CPU of the link module, and controls the data exchange between the buffer
memory and the data memory of the control section, as well as SIO control.
SIO: This is a control circuit for serial communication.
Data memory: Data memory of the control section.
CPU1: Exchanges data with the general purpose communication section, executes the I/O
module processing and control section processing. Timing of communication and
control section is as follows:
PC I/O processing
PC processing
NO
Execute 1 cycle
communication
Completion of
PC 1 scan
Data exchange with PC
data memory
PC hardware check
Memory exchange
request from general purpose
communication section
Data exchange with general
purpose communication
section buffer memory
Control section
JW-32CUM1
General purpose communication section
(data link DL1 )
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