Atlas Copco PowerMACS 4000, User Manual

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Peripheral Devices
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Byte
Process data
IN area
Byte
Process data
OUT area
0 CMD (Most Significant Byte) 0 STS (Most Significant Byte)
1 CMD (Least Significant Byte) 1 STS (Least Significant Byte)
2 2
3 Data : Data
: TO FROM
PowerMACS PowerMACS
: :
Data bytes In
– 1
Data bytes Out
– 1
The first word in the IN area is used as Command (CMD). The fieldbus master writes commands in this to
request PowerMACS perform a task.
The first word in the OUT area is used as Status (STS) in which PowerMACS writes information to
indicate the result of the command issued.