Atlas Copco PowerMACS 4000 User Manual

Peripheral Devices
500 9836 3521 01
The CMD word is laid out as follows:
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Name
R
W
F
S
X
d2
d1
d0
-
-
-
-
-
-
-
-
The respective bits have the following meaning:
Name
Meaning
Usage
R
Read
Set one (1) to read the process data selected with DataType.
W
Write
Set one (1) to write the process data selected with DataType.
F
Flush
Set one (1) to flush the data queue selected with DataType. Flushing will delete all
items in the specified process data queue. However, a data item currently being read
will not be deleted. It can safely be read also after that this command has been issued.
S
Skip
Set one (1) to skip reading of the current data item in the data queue selected with
DataType. Next reading will return next data item (or the first part of it) in the queue.
X
Extended
format
This bit is normally 0.
If this bit is set then which process data queue to read is not specified using the d2..d0.
Instead the queue is specified using an address following the CMD byte. See Using the
extended format for a detailed description. This can be used for to access more data to
the PLC then the particular fieldbus allows.
d2..d0
DataType
Specifies which process data queue the command is issued for.
DataType = 4
d2
+ 2
d1
+ 1
d0
d. Allowed values of DataType are:
 1: Cycle data queue
 2: Event queue
 3: Trace queue
 4: Setup

Atlas Copco PowerMACS 4000 Specifications

General

Brand	Atlas Copco
Model	PowerMACS 4000
Category	Power Tool
Language	English