Hitachi SJ100DN DeviceNet Series Addendum Instruction Manual Addendum page 52

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Network Control and Monitoring
Inverter Monitoring Sequence – Follow these steps to monitor inverter operation via
the DeviceNet network. In this sequence, you will control the inverter from its keypad,
but monitor operation from the network host computer.
a. Begin with power off to the network host, the inverter, and the network power.
b. Turn ON the +24VDC network power.
c. Turn ON power to the host computer and the inverter. The status LEDs will
indicate: MS LED = Green, and the NS LED = OFF.
d. Confirm that the Run Key Enable LED is ON. It is directly above the Run key. If
it is OFF, then be sure that A_02 = 02.
e. On the host computer, start the application that connects it to the network.
f. Set the host application to scan the DeviceNet network. (Do any configuration
required to let the host "see" the inverter on the network.) You may notice that the
inverter's NS LED = Flashing Green during network startup.
NOTE: If the inverter detects another device on the network has the same MAC ID, the
inverter will display the MAC ID code on the front panel display and the inverter is in
Stop Mode. When in Run Mode (or after any key is pressed), the display reverts to the
normal indications.
g. Verify that the inverter's MS LED = Green, and now the NS LED = Green.
NOTE: If the NS LED = OFF, the network is disconnected. Check the cable, and also
check the host application software settings. If the NS LED = Flashing Green, the
network is connected, but idle. Start the host network scan to cause NS LED = Green. If
Red or Flashing Red, use the Status LED table on the previous page to troubleshoot.
h. Confirm that the host computer can see the inverter's polled I/O. You will be
monitoring the inverter's produced (output) I/O data, which are inputs to the host
computer. At this point, all data words = 0000h as shown below.
Inverter Polled I/O
Produced (Output)
Word 0
Word 1
Word 2
Word 3
NOTE: If the host computer cannot find the inverter's polled I/O data, then check the
host application software—its settings and configuration. Refer to the documentation
that came with the host computer software. You may also verify that the host computer
can communicate with another known working device (provided its MAC ID is unique).
i. Provided that the host computer finds the inverter's produced I/O, press the Run
key on the inverter keypad. The motor should run in the same way it did for the
powerup test during the inverter installation.
High byte
MSB LSB
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
Low byte
MSB LSB
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
Hex Decimal
0000h 0
0000h 0
0000h 0
0000h 0