YASKAWA MP900 Series User Manual page 73

Network Maintenance
6.4.2 Slaves
Problem
No DeviceNet
communications
(cont'd)
6
Locations to Check
Indicator Status I/O Status
MS lit green 1040 -
NS not lit
MS lit red 0002 0000
NS not lit
MS lit green 2004 0000
NS flashing
green
MS lit green 4004 4000
NS flashing
green
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Table 6.7 Troubleshooting Slaves (Cont'd)
Probable
Cause
• Communica- 1. Check the wiring and connections for
tions power DeviceNet cables and connectors.
supply error
2. Check the power supply voltage and connection
• DeviceNet
for communications power supply.
network
3. Check the communications power supply
error
voltage for each DeviceNet connector on the
260IF Module (11 to 24 V).
4. Check the terminator (121 Ω) and connection
status.
DeviceNet net- 1. Check the wiring and connections for
work error DeviceNet cables and connectors.
2. Check the baud rate for each device.
3. Check the terminator (121 Ω) and connection
status.
4. Check the operation status of the DeviceNet
Master.
5. Replace the 260IF Module.
Connection not 1. Check the DeviceNet Master scan list settings.
established
2. Check the wiring and connections for
with DeviceNet
DeviceNet cables and connectors.
device
3. Check the baud rate for each device.
4. Check the operation status of the DeviceNet
Master.
DeviceNet I/O 1. Change the I/O sizes for the I/O allocations.
size different
2. Change the I/O sizes for the DeviceNet Master.
from setting
No response 1. Check the wiring and connections for
from DeviceNet cables and connectors.
DeviceNet
2. Check the baud rate for each device.
Master
3. Check the terminator (121 Ω) and connection
status.
4. Check the operation status of the DeviceNet
Master.
5. Check the power supply voltage and connection
for communications power supply.
6. Check the communications power supply
voltage for each DeviceNet connector on the
260IF Module (11 to 24 V).
6-12
Possible Solution