Hitachi SJ100DN DeviceNet Series Instruction Manual page 63

62
Network Control and Monitoring
A get attribute request from the host computer and the inverter's response is shown in
the diagram below.
To perform the network request for parameter F_01 in the inverter, do the following:
a. Verify that your DeviceNet is running and the host computer is scanning.
b. In your host computer application, locate the mechanism for explicit messaging.
Refer to your host computer documentation if necessary.
c. Enter the node, class, Instance, attribute and size numbers in the above diagram.
d. Set the preferred display data format (hex or decimal) of the response (if your
host application provides this.
e. Have the host computer send the explicit message.
f. Verify the inverter's response is 5DCh, or 1500 decimal. If not, check the values
in the get attribute request, and check the present value of parameter F_01 at the
inverter.
g. Apply the scale factor in the Network Register Map table. For F_01, divide by
100, so "1500" becomes 15.00Hz.
A set attribute request works similarly, but you must choose a parameter that permits a
set operation. refer to the right-most column of the table for Get/Set permissions.
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Host sends get attribute request:
Node = 63
Class = 100
Instance = 1
Attribute = 159
Size = 2 bytes
Inverter sends response:
5DCh (hex), or
1500 decimal
Addr = 63