Devicenet Communications - Omron K35-2 Manual

DeviceNet Communications

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