Command Structure - Festo EasyPort USB Manual De Instrucciones

9. EasyPort USB command interpreter
9.2

Command structure

15 14 13 12
Byte 1
(port 2)
136
There are two basic commands for reading and writing resources:
•
Display command (D) for reading resources
•
Modify command (M) for modifying resources
The following types of resources are possible for an EasyPort USB
module:
•
Input (E)
•
Output (A)
•
Events timer (T)
•
High-speed counter (C)
A resource can be addressed as:
•
Bit
•
Byte (B)
•
Word (W)
A word consists of bytes 0 and 1, and contains bit addresses 0 through 15.
11 10 9 8 7
Word 0
6 5 4 3 2
Byte 0
(port 1)
© Festo Didactic GmbH & Co. KG • 721876
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