Synchronization and Time recording
120
A4354-2.2
HBM: public
PMX
9
Synchronization and Time recording
If measurement signals need to be referenced over time
with each other for processing and analysis, for measure
ment data acquisition tasks (DAQ), for example, they
must be synchronously recorded. That is why all PMX
modules can be synchronized with one another. This en
sures simultaneous measurement on all channels. An
internal counter is used for this, and every PMX has one.
Counter format used: 48bit integer
Counter frequency: 153.6 kHz
At a sampling rate of 19.2 kHz (factory setting) the
counter is therefore incremented by 8 from one measured
value to the next.
At a sampling rate of 38.4 kHz the counter is incremented
by 4 from one measured value to the next.
These counters are included in the transfer of every
measured value. The absolute measurement time must
come from a different source. This can be the internal
time from the PMX, or another external clock. The meas
urement data acquisition system then synchronously
combines the measured values with the counter and time
stamp.
To achieve a precise reference over time, the applicable
channels must be parameterized with the same filter set
tings. No automatic runtime correction is carried out. The
filter runtimes are shown in the data sheet.
When PMX devices are connected, the carrier frequency
and the time stamp can be synchronized via the SYNC
socket. The status can be read from the LED.
The master/slave allocation is automatic.
Summary of Contents for PX401
Page 1: ...Operating Manual English PMX...
Page 104: ...Electrical connections PMX 104 A4354 2 2 HBM public PMX...
Page 141: ...Startup PMX A4354 2 2 HBM public 141 Network settings...
Page 239: ...Internal calculation channels PMX A4354 2 2 HBM public 239...
Page 241: ...Internal calculation channels PMX A4354 2 2 HBM public 241...
Page 246: ...Internal calculation channels 246 A4354 2 2 HBM public PMX...
Page 264: ...Internal calculation channels 264 A4354 2 2 HBM public PMX...
Page 272: ...Parameter sets measurement programs 272 A4354 2 2 HBM public PMX...
Page 295: ...Communication with a control system PMX A4354 2 2 HBM public 295...
Page 297: ...Communication with a control system PMX A4354 2 2 HBM public 297...
Page 300: ...Communication with a control system 300 A4354 2 2 HBM public PMX...
Page 376: ...CODESYS V3 Soft PLC WGX001 only 376 A4354 2 2 HBM public PMX...
Page 378: ...CODESYS V3 Soft PLC WGX001 only 378 A4354 2 2 HBM public PMX...
Page 381: ...CODESYS V3 Soft PLC WGX001 only PMX A4354 2 2 HBM public 381...
Page 392: ...CODESYS V3 Soft PLC WGX001 only 392 A4354 2 2 HBM public PMX Dialog Updating the PMX device...
Page 489: ...Object directory PMX A4354 2 2 HBM public 489...
Page 523: ...Diagnosis and maintenance PMX A4354 2 2 HBM public 523 Network settings...