Omron DRT2 SERIES DEVICENET SLAVES - OPERATION MANUAL 04-2008 Operation Manual page 61

DeviceNet Remote I/O Communications
Allocating Real I/O Data
and Generic Status Flags
Individually
Analog Slaves
1,2,3...
Allocating Fixed I/O Data
Patterns
Allocating User-defined
I/O Data
40
Address header
Instead of allocating real I/O and Generic Status Flags together, they can be
allocated individually. This is only possible, however, if the Master Unit is a
CS/CJ-series DeviceNet Unit and the Configurator is used.
15
I/O Area
I/O Area
:
Status Area
Status Area
Data that is allocated for remote I/O communications can be selected using
any of the following methods.
1. Allocating only analog values (default I/O data)
2. Allocating a fixed I/O data pattern
3. Allocating user-defined I/O data
With methods 2 and 3, the Configurator is used to specify the I/O data that is
to be allocated. An outline of the methods used is given below.
There are eleven fixed I/O data patterns. The Configurator is used to select
the desired I/O data pattern from the pull-down menu for the Slave's default
connection path in the Edit Device Parameters Window.
Using the Configurator, the desired combination of I/O data can be allocated
for the Master Unit connection. The desired connection is selected from the
Master's Edit Device Parameters Window. Up to two of the eleven I/O data
patterns can be selected for the connection paths of the connection.
Note If analog data is allocated to a COS connection, a frame will be sent to the
host each analog conversion cycle. This will cause frames to be sent fre-
quently, increasing network traffic and possibly affecting the communications
cycle time.
The Generic Status Flags that are allocated are listed in the following tables.
Analog Terminals
Bit Name
0 ---
1 ---
2 Network Voltage
Monitor Flag
3 Unit Conduction
Time Monitor Flag
4 Cumulative Counter
Flag
5 Unit Error Flag
6 ---
7 ---
IN Area
15 8 7
Generic Status Flags Allocated 8 inputs.
0
Node address 00
Node address 01
Node address 00
Node address 01
Not supported (always 0).
Not supported (always 0).
ON as long as the network power supply remains
below the monitoring set value.
Turns ON when the time that power is supplied to the
Unit exceeds the monitoring set value.
Turns ON when any of the cumulative values
exceeds the monitoring set value.
Turns ON when analog conversion stops due to an
error in the Unit.
Not supported (always 0).
Not supported (always 0).
Section 3-2
0
Description