Omron K3HB - MANUAL 2 Manual page 72

Features
1-1-3 Using DeviceNet
Remote I/O
Communications
Explicit Message
Communications
Automatically Detects
Baud Rate
1-1-4 Default Communications Settings
1-1-5 Data Allocation
The master and K3HB-DRT Digital Indicators can share I/O by using remote I/
O communications. Data in the K3HB-DRT Digital Indicators, such as mea-
surement values and comparative set values, can be allocated for communi-
cations with the master to enable sending and receiving the allocated data via
remote I/O communications without requiring special programming.
• User-set Data Allocations with a Configurator
The specific data required for communications with the master can be
allocated by using I/O allocations from the DeviceNet Configurator.
By sending commands from a PLC, various operations can be performed,
including reading/writing specific monitor values and parameters, such as
reading measurement values or writing comparative set values, and perform-
ing operations using operation commands. CompoWay/F communications
commands can also be executed using explicit message communications.
Previously, the baud rate had to be set for each slave, but the K3HB-DRT Dig-
ital Indicators automatically detect and match the baud rate of the master, so
this setting is not required. (If the master's baud rate is changed, turn OFF the
communications power supply to the Digital Indicator and then turn it ON
again.)
The default settings required for communications when K3HB-DRT are used
as DeviceNet slaves are listed in the following diagram.
Communications Settings:
Node address
Communications Data Allocations:
Monitor value settings, parameters
Operation commands
Status
Refer to the DeviceNet Operation Manual (Cat. No. W267) for information
such as the order for turning ON power to the master and slaves and master I/
O tables.
K3HB-DRT communications data must be allocated for the Read and Write
Areas for communications with the master. Up to 30 items can be allocated for
the Read Area and up to 15 items can be allocated for the Write Area. The
data for each word is allocated using the parameters write data 1 to 15 and
read data 1 to 15.
Unused words can be specified to reserve space according to data types or to
otherwise reduce the number of words.
Refer to 4-2 I/O Allocation on page 6-2 for details on allocation methods.
Be sure that the same node address is not
used for another Unit on the same network.
Section 1-1
3-3