25
Unit Functions
Section 2-3
Comparison with the
Registered Table
When DIP switch pin 1 (REGS) is ON and an I/O configuration table has been
registered in the Communications Unit, the actual I/O configuration is auto-
matically compared to the registered table when the power is turned ON. A
verification error will occur if a registered I/O Unit cannot join I/O communica-
tions or an unregistered I/O Unit is detected.
If there are verification errors, the affected Slice I/O Units will not join in I/O
communications. I/O communications will start with the other Slice I/O Units.
■
Example of Comparison between Figure 1 and Figure 2
Note
(1) Register the I/O configuration table when all of the Slice I/O Units are
communicating, i.e., when the DeviceNet Communications Unit’s TS indi-
cator is lit green.
(2) A mismatch (verification error) with the registered table is indicated at the
DeviceNet Communications Unit’s TS indicator (flashing red) and can be
read from the Configurator. The error details can be read from the Con-
figurator or the error history can be read with an explicit message com-
mand.
#1
#2
#3
#4
#1
#2
#3
#4
From left
Mismatch
I/O
Input
Input
Output
Output
Bits
4
4
4
2
Registered table
Actual configuration
From left
I/O
Input
Input
Output
Output
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
join in communications.
#1
#2
#3
#4
Pin 1 ON when power
was turned ON.
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.
Four
contact
inputs
Figure 2
Four
contact
inputs
Two
relay
outputs
Two
relay
outputs
DeviceNet
Communications
Unit
Summary of Contents for SMARTSLICE - 04-2008
Page 1: ...DeviceNet Communications Unit Cat No W454 E1 03 SmartSlice GRT1 DRT OPERATION MANUAL ...
Page 2: ...SmartSlice GRT1 DRT DeviceNet Communications Unit Operation Manual Revised April 2008 ...
Page 3: ...iv ...
Page 5: ...vi ...
Page 13: ...xiv ...
Page 27: ...8 Basic Operating Procedure Section 1 5 ...
Page 57: ...38 Unit Functions Section 2 3 ...
Page 101: ...82 DeviceNet Explicit Messages Appendix A ...
Page 113: ...94 Standard Models Appendix C ...
Page 115: ...96 Power Consumption Tables Appendix D ...
Page 117: ...98 I O Current Consumption Appendix E ...
Page 119: ...100 Glossary ...