Common Slave Specifications; Communications Specifications; Ms And Ns Indicators - Omron DRT2 Series Operation Manual

Common Slave Specifications

3-1 Common Slave Specifications
3-1-1

Communications Specifications

Item
Communications protocol
Supported connections
(communications)
Connection forms
Baud rate
Communications media
Communications distances Baud rate
Communications power
supply
Max. number of nodes
Max. number of Slaves
Communications cycle time Without Configurator: 16 Input Slaves (16-pt)
Error control
3-1-2

MS and NS Indicators

Indicator Color
MS Green
Red
---
22
DeviceNet
Remote I/O: Master-Slave connection
(Poll/Bit-Strobe/COS/Cyclic)
Conform to DeviceNet specifications.
Combination of multi-drop and T-branch connections (for trunk or branch lines)
500 kbps, 250 kbps, or 125 kbps
Special 5-wire cables (2 signal lines, 2 power lines, 1 shield line)
Network length
500 kbps 100 m max (100 m max)
250 kbps 250 m max (100 m max)
125 kbps 500 m max (100 m max)
Values in parentheses indicate the length when Thin Cables are used.
11 to 25 V DC
64 nodes (including Configurator when used)
63 Slaves
16 Output Slaves (16-pt)
Baud rate of 500 kbps:
Cycle time: 9.3 ms
CRC error check
This section describes the meanings of MS and NS indicators for the Slave
Units.
The MS (Module Status) indicator displays the status of a node on the net-
work.
The NS (Network Status) indicator displays the status of the entire network.
The MS and NS indicators can be green or red and they can be ON, flashing,
or OFF.
Status Definition
Lit Device operational
Lit Unrecoverable fault
Flashing Minor fault
Not lit No power
Specifications
Branch line length Total branch line
6 m max.
6 m max.
6 m max.
Meaning
Normal operating status.
Unit hardware error (watchdog timer error).
Switch settings incorrect, etc.
Power is not being supplied to the Slave Unit.
Waiting for initial processing to start.
The Unit is being reset.
Section 3-1
length
39 m max.
78 m max.
156 m max.