205
Maintenance
Section 7-3
7-3-3
Replacing Units
The DeviceNet Master Unit and Slave Units make up the network. The entire
network is affected when a Unit is faulty, so a faulty Unit must be repaired or
replaced quickly. We recommend having spare Units available to restore net-
work operation as quickly as possible.
Precautions
Observe the following precautions when replacing a faulty Unit.
• After replacement make sure that there are no errors with the new Unit.
• When a Unit is being returned for repair, attach a sheet of paper detailing
the problem and return the Unit to your OMRON dealer.
• If there is a faulty contact, try wiping the contact with a clean, lint-free
cloth dampened with alcohol.
Note To prevent electric shock when replacing a Unit, be sure to turn OFF the
power supplies to all of the nodes (Master and Slaves) before removing the
faulty Unit.
Resetting after Replacing
Units
After replacing a Unit, set the new Unit’s switches to the same settings that
were on the old Unit. Also, if using a Configurator to set the Analog Input Unit,
Analog Output Unit, or Temperature Input Unit, be sure to set them to the
same settings as before.
Settings after Replacing
Master Units
The scan list (network file) must be registered after replacing a Master Unit.
Use the following procedures.
Default Remote I/O Allocations
Turn ON power to all Slaves and then turn ON the Scan List Enable software
switch (bit 00). The scan list will be registered.
User-set Remote I/O Allocations
Perform one of the following procedures.
Using a Network File
The following procedure can be used to write the scan list to the Master Unit
from a network file saved on a disk.
1,2,3...
1.
Turn ON power to the Master Unit and the Configurator.
2.
Place the Configurator online and read the network file that was previously
saved.
3.
Use the device parameter editing operation, specify the Master Unit that
has been replaced, and write the scan list in the network file to the Master
Unit.
Network file
Replace Master Unit.
Write to new Master Unit.
Summary of Contents for DRT1-COM
Page 1: ...OPERATION MANUAL Cat No W348 E1 05 DRT1 COM GT1 Series DeviceNet MULTIPLE I O TERMINAL ...
Page 2: ...DRT1 COM GT1 Series DeviceNet MULTIPLE I O TERMINAL Operation Manual Revised May 2003 ...
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