YASKAWA MP900 Series - Page 70

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6.4
Troubleshooting
6-9
6
Table 6.4 Troubleshooting the Master (Cont’d)
Problem
Locations to Check
Probable
Cause
Possible Solution
Indicator Status I/O Status
No DeviceNet
communications
(cont’d)
MS lit green
NS not lit
1040 - Communica-
tions power
supply error
1. Check the wiring and connections for
DeviceNet cables and connectors.
2. Check the power supply voltage and connection
for communications power supply.
3. Check the communications power supply
voltage for each DeviceNet connector on the
260IF Module (11 to 24V).
0002 0000 1. Check the wiring and connections for
DeviceNet cables and connectors.
2. Check the baud rate for each DeviceNet device
in the network.
3. Check the terminator (121
Ω
) and connection
status.
4. Check the operation status of DeviceNet
devices on the network.
5. Replace the 260IF Module.
MS lit green
NS flashing
green
2004 0000 Connection not
established
with DeviceNet
device
Set the I/O allocations.
MS lit green
NS flashing
red
4004 404D I/O sizes of
each DeviceNet
device are dif-
ferent from set-
ting.
1. Change the I/O sizes for the I/O allocations.
2. Change the I/O sizes for the DeviceNet device.
4004 404E No response
from
DeviceNet
device.
1. Check the wiring and connections for
DeviceNet cables and connectors.
2. Check the baud rate for each DeviceNet device
in the network.
3. Check the power supply status of DeviceNet
devices on the network.
4004 4056 DeviceNet
device is idle.
Remove the cause of the idle status of the
DeviceNet device.
Communica-
tions are occur-
ring but the
maximum com-
munications
cycle time
exceeds the set-
ting.
MS lit green
NS lit green
8004 8000 Too much traf-
fic on
DeviceNet. The
communica-
tions cycle time
setting is too
low for the I/O
command send
time.
Set a longer communications cycle time.