Online Replacement Function - Omron GRT1 - 11-2007 Operation Manual

Functions Shared by all Units
Note
2-3-3

Online Replacement Function

Function Overview
Replacement Procedure
1,2,3...
5. When the power is turned ON again, the Communications Unit will auto-
matically detect the Unit that was replaced and download the backup data.
The I/O Unit's TS indicator will indicate the results of the restore operation.
• If the download was successful, the Unit will be reset automatically and
join I/O communications normally. The I/O Unit's TS indicator will be lit
green.
• If the download failed, the I/O Unit's TS indicator will be flash red.
• If the connected Unit is the wrong model, the I/O Unit's TS indicator will be
lit red.
(1) Do not turn OFF the power or reset the Unit from the Configurator while
data is being restored. The data will not be restored properly if the power
is turned OFF or the Unit is reset.
(2) When an I/O Unit has been replaced with the power ON and the new I/O
Unit joins I/O communications, the new Unit will be compared to the pre-
vious one and the parameter data restore operation will start automatical-
ly. While data is being restored, the DeviceNet Communications Unit's TS
indicator will flash green every 0.5 s. The TS indicator will stop flashing
(not lit) when the restore operation is completed. If the restore operation
fails, the Automatic Restore Monitor Flag (bit 13 of the Communications
Unit Status Flags) will be turned ON and the Communications Unit's TS
indicator will be lit red for 2 s.
When one of the Slice I/O Units connected to the Communications Unit must
be replaced, the Unit can be replaced without turning OFF the Slice Bus
Power. Any AC power supplied via the Slice I/O Terminal must always be
turned OFF before replacing a Unit.
The Units can be replaced online because the Slice I/O Units are made up of
3 blocks: the base block, main block, and terminal block. When replacing a
Slice I/O Unit, leave just the base block connected and replace the main
block. I/O communications will continue with the other I/O Units even while the
problem Unit is being removed and replaced.
Power ON
If pin 1 and pin 3 are ON,
data is automatically restored
to the replaced Unit.
1. Turn OFF the I/O power supply of the I/O Unit being replaced.
2. Release the hook on the front of the I/O Unit that you want to replace and
remove the terminal block. The wiring can remain connected.
3. Remove the main block of the Slice I/O Unit and replace it with a new I/O
Unit.
To keep the system online, leave the
communications block connected.
Communications
#1
#2
Unit
Section 2-3
#4
#3
Unit being
replaced
19