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1.2
MNS LED (operation status indication)
MNS LED indicates the operating status of the option unit according to the indication status.
Check the position of LED on page 2.
LED
Operating Status
Indication
Inverter power off
Off
Network power off
Own node only on the network
Network and inverter power on
Green
Connection not yet
(flickering)
established by host
Network and inverter power on
Green (lit)
Connection established by
host
Red (flickering) Connection time-out
Red (lit)
Critical link failure
* Time limit = 4 × EPR (EPR = Expected Pack Rate Class 0x05 Instance 1 Attribute 9 (refer to page 50))
· Turn inverter power on. Option unit will then complete duplicate
station number test.
· Check the voltage of the network power.
· Add other nodes to the network.
The inverter power turns on and duplicate of node address is being
checked. However, a host has not yet established a communication
link.
A master device on the network has designated the option unit for
communications.
LED holds the state also during communication.
Master designated the option unit for communication on the
network, but then sent no messages within the time limit * set in the
expected packet rate.
Check for the followings.
· Duplicate node address on the network
· Cable from option unit to network not connected or severed.
· Network damaged
Take the appropriate corrective action, then reset the inverter to
recover from the fault.
PRE-OPERATION INSTRUCTIONS
Note
1
3
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