Mitsubishi Electronics A1SJ71AT23BQ User Manual

3

3.4.2

Details of I/O signal

The following shows details of I/O signal of a local module.

The link status is turned ON when the host station is offline, station-to-station test, or 
self-loopback test.
The link status is turned OFF when setting the host station online and turning power 
supply ON from OFF or resetting the CPU module.

Operations of link refresh are shown below.
For the programming, refer to the following.

(a) Turning power supply ON from OFF or resetting the CPU module

1) A local module turns ON the B/W initial value setting status (X1).

2) The B/W device of the CPU module is written to the B/W device of the local 

module in a sequence program.

3) When CPU operating status (DY10) and Refresh request (DY16) are turned 

ON in a sequence program after writing the initial value to the B/W device of 
the local module, a Q series local station starts data communication with other 
stations.

Link scan

Refresh in execution (DY11)

Refresh ready status (X7)

Device memory storage area

Local module

Local module

Link data storage area

CPU module

CPU module

Sequence scan

Power-on

CPU operating status (DY10)

B/W initial value setting status (X1)

Refresh request (DY16)

Sending/receiving data

Sending/receiving data

At power-on, sending/receiving 
data to/from other station is started 
after setting the B/W initial value.

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(Buffer memory address: 100

H

 to 13FF

H

)

Program for refresh

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