1 Features and System Configuration
1.4.4 DeviceNet Communications Specifications
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1.4.4 DeviceNet Communications Specifications
The DeviceNet Unit provides the following DeviceNet communications specifications.
* Values in parentheses are for thin cable.
Item
Specifications
Communications Protocol
Conforms to DeviceNet
Supported Connections
(Communications)
Master-slave connections: Remote I/O and Explicit Messagee communications
Connection Methods
Combination of multi-drop and T-branch connections (for trunk or drop lines)
Baud Rate
Set on rotary switch (DR) to 125, 250, or 500 kbit/s.
Node Address Settings
Set on rotary switches (
×
1 and
×
10) to an address between 0 and 63.
Communications Media
Special 5-wire cable (2 signal wires, 2 power supply wires, and 1 shield wire)
Communications Distance
Baud Rate
(kbit/s)
Max. net-
work length
(m)
Max. drop
line length
(m)
Max. total
drop line
length (m)
500
100 (100)
∗
6 39
250
250 (100)
∗
6 78
125
500 (100)
∗
6 156
Communications Power
Supply
11 to 25 V DC
Communications
Power Supply
Current Consumption
20 mA max.
Maximum Number of Nodes
64 (DeviceNet Configurator is counted as 1 node when connected.)
Maximum Number of
Slaves
63
Communications Cycle
Time
DeviceNet processing time
1 ms or less to 4 ms
From DeviceNet Unit start command until
command to Servo Driver
Min.: 8 ms
Max.: 16 ms
Explicit Message response time
Normal attributes: 1 ms or less to 4 ms
Reading/writing servo parameter: 28 ms max.
Error Control
CRC errors
Summary of Contents for OMNUC W R88A-NCW152-DRT
Page 1: ...Cat No I538 E3 1 DeviceNet Option Unit OMNUC W Series Model R88A NCW152 DRT...
Page 53: ...4 Connectors 4 5 3 DeviceNet Network Configuration Restrictions 4 22 4...
Page 97: ...5 Parameter Settings 5 3 8 Notch Signal Output Positioning 5 44 5...
Page 211: ...8 Servo Driver Settings 8 5 3 Absolute Encoder Multi turn Limit Setting 8 24 8...
Page 257: ...9 Troubleshooting 9 46 9...