Power Electronics SD450 Series, Manual

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SD450 - DEVICENET POWER ELECTRONICS
22
CONFIGURATION OF DEVICENET OPTIONAL BOARD
4.3.3. Poll I/O Connection
It is a data transaction between inverter and scanner.
o
I/O size: 4 bytes.
o
Communication Rate: 0 (default)
o
Data Transaction: Poll I/O.
Data Transaction through Poll I/O is determined by the setting of
Assembly Instance (parameters ‘COM-12
Î
DeviceNet Output
Instance’ and ‘COM-13
Î
DeviceNet Input Instance’).
Assembly Instance consists of Input and Output, based on Scanner
side. Therefore, input data means data that scanner receives. For
inverter side, it is the feedback value to the scanner.
On the other hand, output data is the data that scanner transmits to
the inverter as a new command.
Figure 4.1 Data transaction through Poll I/O communication
Scanner side Inverter side
Input Assembly Data
Receive data Transmit data
Output Assembly Data
Transmit data Receive data