Atlas Copco PowerMACS 4000, User Manual

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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 * (
NoTs
NoAsamples
– 1)
Last A sample Float The last Angle Sample (sample NoAsamples)
63 + 4 * (
NoTs
NoAsamples) 1
st
C sample Float The first Current sample
63 + 4 * (
NoTs
NoAs
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.