Omron GRT1 - 27-11-2006 Operation Manual page 56

Unit Functions
Comparison with the
Registered Table
Pin 1 ON when power
was turned ON.
Note
When DIP switch pin 1 (REGS) is ON and an I/O configuration table has been
registered in the Communication Unit, the actual I/O configuration is automat-
ically compared to the registered table when the power is turned ON. A verifi-
cation error will occur if a registered I/O Unit cannot join I/O communication or
an unregistered I/O Unit is detected.
In case of verification errors, the affected SmartSlice I/O Units will not partici-
pate in I/O communication. I/O communication will start with the other Smart-
Slice I/O Units.
■ Example of Comparison between Figure 1 and Figure 2
I/O Bits
From left
#1 Input 4
#2 Input 4
Output 4
#3
#4
Output 2
Registered table
Figure 2
PROFIBUS
Communications
Unit
Registration table
The actual configuration is compared to the registered table.
Units that do not match the registered table do not participate
in I/O communications. I/O communications start with the other
I/O Units.
1. Register the I/O configuration table when all of the SmartSlice I/O Units are
communicating, i.e., when the PROFIBUS Communication Unit's TS indi-
cator is lit green.
2. A mismatch (verification error) with the registered table is indicated at the
PROFIBUS Communication Unit's TS indicator (flashing red). The error
details can be retrieved using the GRT1-PRT DTM. Also, the error history
can be read with an explicit message command.
I/O
From left
#1
Input
#2
Input
Mismatch
#3 Output
#4 Output
Actual configuration
Four Four Two Two
contact contact relay relay
inputs inputs outputs outputs
#1
#2 #3 #4
Section 3-2
Bits
4
4
2
2
There are the same number of
Units, but the I/O data size does
not match, so a verification error
occurs and this I/O Unit does not
participate in communications.
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