Omron SMARTSLICE - 04-2008 Operation Manual page 22

Features and System Configuration
Simplified I/O Wiring
Table Registration
Communications Error
History Monitor
Online Replacement of I/O
Units
Parameter Backup and
Restore
Automatic Baud Rate
Recognition
Network Power Supply
Voltage Monitor
Unit Power ON Time
Monitor
Unit Comment
The Unit's configuration is read automatically when the power is turned ON
and I/O is also automatically allocated in the Slice I/O Units. It is not neces-
sary to make any settings with a special Programming Device.
All of the Slice I/O Units that connect to a DeviceNet Communications Unit are
equipped with screw-less clamp terminal blocks. Wiring to external I/O is
accomplished just by inserting the wire into the terminals, eliminating the
need to tighten terminal screws.
The configuration of the Slice I/O Units (mounting order and I/O size) con-
nected to a DeviceNet Communications Unit can be registered in a table sim-
ply by switching a pin on the DeviceNet Communications Unit's DIP switch.
Once the table has been registered, the actual configuration is compared to
the registered configuration each time that the power is turned ON. If the con-
figuration does not match, a status flag can be turned ON in the DeviceNet
Master to indicate the error.
The communications error history in the DeviceNet Communications Unit can
record the four most recent communications errors in the DeviceNet network
and the 64 most recent Slice I/O Terminal errors. The communications error
information (communications error cause code and communications power
supply voltage when error occurred) can be read with an explicit message
command or from the Configurator.
The Slice I/O Unit's circuit section can be removed, so it isn't necessary to
turn OFF the power to replace a Unit. Communications can be maintained in
the remaining (connected) Units.
Before replacing a Slice I/O Unit for maintenance, the parameter data set in
the I/O Unit can be backed up in the DeviceNet Communications Unit by
switching a pin on the Communications Unit's DIP switch. After the I/O Unit
has been replaced, another DIP switch operation can be used to select the
mode that automatically writes the backed-up parameter data to the appropri-
ate Units.
The DeviceNet Communications Unit automatically detects the Master's com-
munications baud rate, so it isn't necessary to set the baud rate. (If the Mas-
ter's baud rate has been changed, the DeviceNet Communications Unit must
be turned OFF and then ON again to change its baud rate.)
The DeviceNet network's power supply voltage values (present, maximum,
and minimum values) are recorded in the DeviceNet Communications Unit.
The Configurator can be used to read the recorded information. Furthermore,
a warning voltage level can be set in the DeviceNet Communications Unit in
order to notify the Master if the voltage drops below that preset warning level.
This function records the total time that the DeviceNet Communications Unit's
internal circuit power has been ON. The Configurator or explicit messages
can be used to read the information. Furthermore, a warning voltage level can
be set in the DeviceNet Communications Unit in order to notify the Master if
the set warning time is exceeded.
A user-set name can be assigned to each DeviceNet Communications Unit
and recorded in the Unit. When making settings or monitoring operation, the
comments make it easy to identify individual Units based on their application
or location.
Section 1-2
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