Instruction manual

6. Operating with DeviceNet Communications

 I/O Message Communications

The DeviceNet-compatible Inverters use poll command/response mes-

sages for I/O message communications. Select one of the seven sup-

ported I/O instances and transfer I/O data with the master. I/O messages

are always transferred between the Inverter and master at the fixed com-

munications period whether or not there have been changes to the I/O

data.

Basic I/O Instances

This is a standard I/O instance type defined in DeviceNet’s AC Drive

Profile. Four bytes are used for input data and four bytes are used for

output data.

• Input (Master → Inverter) Instance 20 (14 Hex)

Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

0 --- --- --- --- --- Fault

Reset

--- Run

Fwd

1 --- --- --- --- --- --- --- ---

2 Speed Reference (Low Byte)

3 Speed Reference (High Byte)

Data Name Contents

Byte 0,

bit 0

Run Fwd Runs the Inverter forward.

0: Stop.

1: Run forward.

Byte 0,

bit 2

Fault Reset Resets the Inverter from fault status.

0: ---

1: Reset fault.