Yaskawa MP940 Hardware Manual - Manual (Page 39)

MotionSuite™ MP940 Machine Controller Hardware Manual Section 5: Communications
36
Indicators Problem Probable Cause Possible Solution
MS green lit
NS green flash-
ing (cont.) No DeviceNet
communica-
tions (cont.) No response
from
DeviceNet
master (1) Check the wiring and connections for 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) Check the voltage and connection for network power
supply.
(6) Check the communications power supply voltage on
the DeviceNet connector of the MP940D (11 to 24V).
DeviceNet I/O
size different to
setting (1) Change the I/O sizes for the I/O allocations.
(2) Change the I/O sizes for the DeviceNet device.
MS green lit
NS red flashing No response
from
DeviceNet
master (1) Check the wiring and connections for 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) Check the power supply voltage and connection for
network power supply.
(6) Check the communications power supply voltage on
the DeviceNet connector of the MP940D (11 to 24V).
DeviceNet I/O
size different to
setting (1) Change the I/O sizes for the I/O allocations.
(2) Change the I/O sizes for the DeviceNet device.
MS green lit
NS red flashing The MAC ID
rotary switch
setting is
different than
the MAC ID
software
setting (1) Change the MAC ID software setting.
(2) Change the MAC ID rotary switch setting and cycle
the power.
MS green lit
NS green lit The MAC ID
rotary switch
setting is
different than
the MAC ID
software
setting (1) Change the MAC ID software setting.
(2) Change the MAC ID rotary switch setting and cycle
the power.
„ Slave
Troubleshooting Slaves