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Starting and Stopping Remote I/O Communications Section 4-5
Configurator Setting Methods
Refer to the DeviceNet Configurator Operation Manual (W382) for setting
methods.
4-5 Starting and Stopping Remote I/O Communications
4-5-1 Starting Remote I/O Communications
Remote I/O communications start automatically after the power is turned ON
or the Unit is restarted.
The I/O Data Communications Flag (word n+12, bit 15) is turned ON when
remote I/O communications is started with at least one slave.
4-5-2 Stopping Remote I/O Communications
Remote I/O communications stop under the following user-controlled condi-
tions. Message communications can still be performed when the remote I/O
communications stop.
Stop Communications
With All Slaves
Remote I/O communications stop when the Remote I/O Communications
Stop Switch (word n, bit 04) is turned ON.
Stop Communications
With a Specified Slave
Remote I/O communications stop when the Disconnect/Connect Switch for
the desired slave (words n+6 to n+9) is turned ON. (Units are disconnected
from remote I/O communication when the Disconnect/Connect Switch is
turned ON.)
Note The communications cycle time is not shorter even though a slave has been
disconnected from remote I/O communications by turning ON the Disconnect/
Connect Switch. (Blank time in the communications cycle will only be
increased.)
4-5-3 Restarting Remote I/O Communications
Remote I/O communications restart under the following conditions,
Restart Communications
with All Slaves
Remote I/O communications restart when the Remote I/O Communications
Start Switch (word n, bit 01 or 03) is turned ON. (Only communications with
slaves stopped using the Disconnect/Connect Switch will be restarted.)
Restart Communications
with Specified Slave
Remote I/O communications restart when the Disconnect/Connect Switch for
the desired slave (words n+6 to n+9) is turned ON. Restoring the unit will have
been completed when the Disconnect/Connect Switch turns OFF.)
4-6 Example of Ladder Programming for Remote I/O
Communications
When writing ladder programming for remote I/O communications, make sure
it performs I/O processing with a Slave under the following conditions:
• The I/O Data Communications Flag (word n+12, bit 15) is ON.
• The Unit Error Flag (word n+10, bit 00) is OFF.
Example: There is no jump and slave I/O is processed when the JMP(004)
instruction input condition is ON in the following instructions. There is a jump
and slave I/O is not processed when the JMP(004) instruction input condition
is OFF.