Online Replacement Function - Omron GRT1 - 27-11-2006 Operation Manual

Unit Functions
3-2-4

Online Replacement Function

Function Overview
Replacing a Unit
1,2,3...
Note
40
When one of the SmartSlice I/O Units connected to the PROFIBUS Commu-
nication Unit must be replaced, the Unit can be replaced without turning OFF
the power. The Units can be replaced online because the SmartSlice I/O
Units are made up of 3 blocks: the base block, main block, and terminal block.
When replacing a SmartSlice I/O Unit, leave just the base block connected
and replace the main block. I/O communication will continue with the other
I/O Units even while the problem Unit is being removed and replaced.
Power ON
If DIP switches 1 and 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 locks on the front of the I/O Unit that must be replaced and
remove the terminal block. The wiring can remain connected.
3. Remove the main block of the SmartSlice I/O Unit and replace it with a new
I/O Unit of the same type.
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 communication during replacement, the
corresponding SmartSlice I/O Unit Communication Withdrawn Flag will go
ON and the PROFIBUS Communication 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 3) must be
completed. See 3-2-3 Automatic Restore Function for details.
3. Always turn OFF the I/O Unit's I/O power supply before replacement in or-
der to prevent false output signals, false input signals, and electrical
shocks. In addition, if external power is supplied to the terminal block for a
Unit such as a Relay Output Unit, turn OFF that power supply before re-
placing the Unit.
4. Only replace one I/O Unit at a time.
5. Always replace the I/O Unit with the same model of I/O Unit. If a Unit is re-
placed with a different model, there may be unexpected outputs and the re-
store operation may not be completed properly.
6. If the base block is faulty or damaged, turn OFF the power supply and re-
place the entire Unit. Even in this case, the I/O Unit's parameter data will
be restored automatically if the automatic restore function is enabled when
the power is turned ON.
To keep the system online, leave the
communications block connected.
PROFIBUS
#1
#2
Communications
Unit
Section 3-2
#4
#3
Unit bein
replaced