Toshiba DeviceNet nv Series, Инструкция по эксплуатации, Страница: 137 / 159

6.2 Troubleshooting
Unified Controller nv Series DeviceNet Module DN611B Instruction Manual
121
6.2.4
Data Communication with Slave Devices
1) Data communication with slave devices doesn't start
If the node status shows an error, remove the cause of the trouble, referring to 6.1.3 RAS Information Read
Data.
Table 6-24 Slave Device Communication Check Items (1)
Description of Check
Check controller power
Check network cable connections (wrong wiring, breaks).
DN611B Check the node address settings (for duplicate node
addresses).
Check the network communication rate settings (same
communication rate).
Check the local node parameter settings and the scan
list.
Check the slave devices for normal operation, referring
to the manual for the slave devices.
Check network cable connections (wrong wiring, breaks).
Slave device Check the node address settings (for duplicate node
addresses).
Check the network communication rate settings (same
communication rate).
Check setting items specific to the slave devices.
Check the terminators at both ends of trunk cables (121
Ohms).
Check the maximum network length specified. Refer to
1.3.2 Trunk line/drop line and maximum cable length.
Check the drop cable length (6 m or less).
Network Check the total extension of drop cables. Refer to 1.3.2
Trunk line/drop line and maximum cable length.
Check the network power supply method and power
capacity. Refer to 3.6.1 Network power supply method
and 3.6.3 Network power unit.
Check the grounding of the network cables. Refer to 3.6.4
Network grounding.