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ANUAL
FT9Y-B1378 12-1
12:REMOTE I/O
Introduction
When you want to increase the number of I/Os to be connected to a single SmartAXIS, you can achieve this using the remote I/O
function.
In addition to the built-in I/Os of the SmartAXIS, you can expand the number of I/Os up to a maximum of 90 inputs and 54
outputs.
The remote I/O function can only be used on the SmartAXIS equipped with an Ethernet port.
Configure the SmartAXIS to which inputs and outputs need to be expanded as the remote I/O master, and configure the
SmartAXIS to be the remote inputs and outputs as the remote I/O slaves.
The remote I/O master is configured on connections 1 through 3 in the Function Area Settings dialog box. The remote I/O slave is
configured in the Remote I/O Slave Configuration dialog box.
The SmartAXIS configured as a remote I/O master can connect to one remote I/O slave per one connection. When the
connections 1 through 3 are all used for remote I/O, the remote I/O master can connect to a maximum of three remote I/O slaves.
Notes:
• If a communication timeout occurs at a remote I/O slave, all outputs of the remote I/O slave are turned off.
Depending on the details of the control on the remote I/O slave side, this may lead to a hazardous situation, so set the master receive
timeout to an ample length. If the master receive timeout setting is made long, the time that the remote I/O slave outputs remain on also
becomes long when communication is actually lost. Set the master receive timeout to a value suited to each application.
• The SmartAXIS configured as remote I/O master/slave communicates over Ethernet. When other SmartAXIS or other network devices are
connected on the same LAN, the I/O refresh timing for the remote I/O slaves is affected by those devices.
Applicable SmartAXIS
FT1A-12 FT1A-24 FT1A-40 FT1A-48
—XXX
Ethernet
Connection 1
Connection 2
Connection 3
Remote I/O slave
Remote I/O slave
Remote I/O master
Remote I/O slave
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