Omron K3HB - DeviceNet Communications; DeviceNet Protocol and Standards; DeviceNet Supported Communications; DeviceNet I;O Allocation Guide

Digital Indicators K3HB-X/-V/-H/-S 21
DeviceNet Communications
■ Internal Block Diagram
Communications protocol Conforms to DeviceNet
Supported communi-
cations
Remote I/O communications Master-Slave connection (polling, bit-strobe, COS, cyclic)
Conforms to DeviceNet communications standards.
I/O allocations Allocate any I/O data using the Configurator.
Allocate any data, such as DeviceNet-specific parameters and variable area for Digital
Indicators.
Input area: 2 blocks, 60 words max.
Output area: 1 block, 29 words max.
(The first word in the area is always allocated for the Output Execution Enabled Flags.)
Message communications Explicit message communications
CompoWay/F communications commands can be executed (using explicit message
communications)
Connection methods Combination of multi-drop and T-branch connections (for trunk and drop lines)
Baud rate DeviceNet: 500, 250, or 125 Kbps (automatic follow-up)
Communications media Special 5-wire cable (2 signal lines, 2 power supply lines, 1 shield line)
Communications distance
Baud rate Network length
(max.)
Drop line length
(max.)
Total drop line
length (max.)
500 Kbps 100 m (100 m) 6 m 39 m
250 Kbps 100 m
(250 m)
6 m 78 m
125 Kbps 100 m
(500 m)
6 m 156 m
The values in parentheses are for Thick Cable.
Communications power supply 24-VDC DeviceNet power supply
Allowable voltage fluctuation range 11 to 25-VDC DeviceNet power supply
Current consumption 50 mA max. (24 VDC)
Maximum number of nodes 64 (DeviceNet Configurator is counted as one node when connected)
Maximum number of slaves 63
Error control checks CRC errors
DeviceNet power supply Supplied from DeviceNet communications connector
ADC
EEP-ROM
Analog input
Event input
DeviceNet
X
V O
V O
BCD I/O
Sensor power
supply
Keys
Micro-
computer
Waveform
shaping circuit
Drive
circuit
Indications
Drive
circuit
Digital input
circuit
Filter
Input
circuit
BCD
• Input circuit
• Output circuit
• Transistor
output circuit
Drive
circuit
Drive
circuit
Drive
circuit
Drive
circuit
Transistor
output
Relay output
Linear output
Communications
DeviceNet
circuit
Communi-
cations
driver
Power supply
Power supply circuit (isolated)
V
DD V COM
DC-DC
Converter (isolated)
Linear output
circuit