Atlas Copco PowerMACS 4000

Peripheral Devices
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If all items are included then the size of an event is 144 bytes.
8.17.4 Layout of Traces in Process data
A Trace contains data as described in the table below.
Offset
Item
Data type
Description
0
DataNo
Short integer
A device unique sequence number. This number is
incremented by one for each trace reported over the
device.
2
FmtVer
Long integer
Format version on the TC when the trace was created
6
Station
Long integer
Station
10
Bolt
Long integer
Bolt
14
Time
Time
Timestamp of trace
18
Freq
Float
Sampling frequency in Hz
22
TimeOffset
Long integer
Offset to first sample in milliseconds
26
NoTsamples
Long integer
Number of torque samples [0..2000]
30
NoAsamples
Long integer
Number of angle samples [0..2000]
34
NoCsamples
Long integer
Number of current samples [0..2000]
38
Not used
Long integer
Always zero (0)
42
PgmName
char[21]
Name of program used at the occasion
63
1
st
T sample
Float
The first Torque sample
63 + 4 * (
NoTsamples – 1)
Last T sample
Float
The last Torque Sample (sample NoTsamples)
63 + 4 * (
NoTsamples)
1
st
A sample
Float
The first Angle sample
63 + 4 * (
NoTsamples +
NoAsamples – 1)
Last A sample
Float
The last Angle Sample (sample NoAsamples)
63 + 4 * (
NoTsamples +
NoAsamples)
1
st
C sample
Float
The first Current sample
63 + 4 * (
NoTsamples +
NoAsamples +
NoCsamples – 1)
Last C sample
Float
The last Current Sample (sample NoCsamples)
The trace will only contain the samples that are recorded. This means that only data for used channels are
recorded. The number of samples included for each channel is given by the variable NoTsamples,
NoAsamples, NoCsamples and NoGsamples respectively.