Grt1-Ml2 Functions; Online Replacement - Omron GRT1-ML2 Manual

Setup and usage
WDOG when an error occurs in the GRT1-ML2. 4000 hex equals 0100 0000
0000 0000 binary. Bit 14 is the overall error bit, which is set to 1 when an
error occurs.
2.2

GRT1-ML2 functions

2.2.1 Table registration
The table registration function registers the configuration of the SmartSlice I/
O Units that are connected to the GRT1-ML2 in a table in the GRT1-ML2.
This allows for a comparison of the acutal configuration when the power is
turned on with the registered configuration.
• To enable the registered table, make sure that unit dipswitch 1 (REGS) is
set to ON before the power is turned on.
• To disable the registered table, make sure that unit dipswitch 1 (REGS)
is set to OFF before the power is turned on. In this case, the GRT1-ML2
automatically detects the actual I/O configuration and starts the
communication.
Create a new registration table
To register the table, make sure the power of the GRT1-ML2 and the
SmartSlice I/O Units is on, and set unit dipswitch 1 (REGS) on the GRT1-
ML2 from OFF to ON. If the registration table is refreshed, the old
registration table is erased.
It is recommended to register the I/O configuration table when all
SmartSlice I/O Units are communicating, that is, when the TS LED
is lit green.
The configuration information that is registered contains these items:
• The order of the SmartSlice I/O Units connected to the GRT1-ML2.
• The I/O size (input or output, number of bits) of each SmartSlice I/O Unit.
The configuration information does not contain the model numbers of the
SmartSlice I/O Units.
GRT1-ML2 MANUAL
Comparison of the actual configuration and the registered table
When unit dipswitch 1 is set to ON, an I/O configuration table is registered in
the GRT1-ML2, and the GRT1-ML2 is turned on, the GRT1-ML2
automatically compares the actual I/O configuration and the registered table.
If a registered SmartSlice I/O Unit cannot participate in he I/O
communication, or if the GRT1-ML2 detects an unregistered SmartSlice I/O
Unit, a verification error occurs. In this case, the concerned SmartSlice I/O
Units do not participate in the I/O communication. The I/O communication
starts with the other SmartSlice I/O Units.
From left I/O Bits
#1 Input 4
#2 Input 4
#3 Output 4
#4 Output 2
Registered table
The tables above give an example of a mismatch between the registered
table and the actual configuration. The I/O data sizes of the third unit do not
match. Therefore, a verification error occurs and the third unit does not
participate in the communication.
The TS LED flashes red when a verification error occurs.
2.2.2

Online replacement

It is possible to replace SmartSlice I/O Units connected to a GRT1-ML2
when the power is on. The I/O communication continues while a SmartSlice
I/O Unit is removed and replaced.
To replace a SmartSlice I/O Unit online, do these steps:
1. Turn off all power supplies of the SmartSlice I/O Unit. This is the I/O
power supply, plus possible external power supplies to the terminal block
(for example, a Relay Output Unit).
2. Release the locks on the front of the unit and remove the terminal block.
Do not remove the wiring.
3. Remove the main block of the unit. Replace it with a new SmartSlice I/O
Unit of the same type.
From left I/O Bits
#1 Input 4
#2 Input 4
Mismatch #3 Output 2
#4 Output 2
Actual configuration
14