Omron SmartSlice GRT1 Series Operation Manual page 35

Functions Shared by all Units
Note
2-3-3 Online Replacement Function
Function Overview
Replacement Procedure
1,2,3...
Note
16
(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 in-
dicator 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 power. 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.
4. Mount the terminal block that was removed in step 2 and latch the hook
that was released.
5. Turn ON the I/O power supply.
(1) When a Unit withdraws from I/O communications during replacement, the
corresponding Slice I/O Unit Communications Withdrawn Flag will go ON
and the Communications Unit's TS indicator will flash red.
(2) Before using the automatic restore function, the preparation for automatic
restoration (creating backup data and turning ON DIP switch pin 3) must
be completed. See 2-3-2 Automatic Restore Function for details.
(3) Always turn OFF the I/O Unit's I/O power supply before replacement in
order to prevent false output signals, false input signals, and electrical
To keep the system online, leave the
communications block connected.
Communications
#1
#2
Unit
Section 2-3
#4
#3
Unit being
replaced