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Common Slave Specifications Section 3-1
3-1 Common Slave Specifications
3-1-1 Communications Specifications
3-1-2 MS and NS Indicators
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.
Item Specifications
Communications protocol DeviceNet
Supported connections
(communications)
Remote I/O: Master-Slave connection
(Poll/Bit-Strobe/COS/Cyclic)
Conform to DeviceNet specifications.
Connection forms Combination of multi-drop and T-branch connections (for trunk or branch lines)
Baud rate 500 kbps, 250 kbps, or 125 kbps
Communications media Special 5-wire cables (2 signal lines, 2 power lines, 1 shield line)
Communications distances Baud rate Network length Branch line length Total branch line
length
500 kbps 100 m max (100 m max) 6 m max. 39 m max.
250 kbps 250 m max (100 m max) 6 m max. 78 m max.
125 kbps 500 m max (100 m max) 6 m max. 156 m max.
Values in parentheses indicate the length when Thin Cables are used.
Communications power
supply
11 to 25 V DC
Max. number of nodes 64 nodes (including Configurator when used)
Max. number of Slaves 63 Slaves
Communications cycle time Without Configurator: 16 Input Slaves (16-pt)
16 Output Slaves (16-pt)
Baud rate of 500 kbps:
Cycle time: 9.3 ms
Error control CRC error check
Indicator Color Status Definition Meaning
MS Green Lit Device operational Normal operating status.
Red Lit Unrecoverable fault Unit hardware error (watchdog timer error).
Flashing Minor fault Switch settings incorrect, etc.
--- Not lit No power Power is not being supplied to the Slave Unit.
Waiting for initial processing to start.
The Unit is being reset.
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