equinor / equinor/tagreader-python

ReaderType.LAST does not return last value

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Python
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Descrizione

When using ReaderType.ACTUAL or 'SNAPSHOT', the last value retrieved consistently shows an hour offset. Instead of retrieving the actual last data point, it returns the data point from one hour earlier.

This code:

import tagreader
from tagreader import list_sources
from datetime import datetime, timedelta
from tagreader.utils import ReaderType

c = tagreader.IMSClient(datasource='GFC', imstype='aspenone')
try:
c.connect()
print("Connection successful")
except Exception as e:
print(f"Connection failed: {e}")


# Use the read() method to read the tag data
df_LAST = c.read(tags=['GFC.03-ST121.RPM'], read_type=ReaderType.LAST)
df_SNAPSHOT = c.read(tags=['GFC.03-ST121.RPM'], read_type='SNAPSHOT')
df = c.read(tags=['GFC.03-ST121.RPM'], start_time='04-11-24 12:50:00', end_time='04-11-24 13:10:00', read_type=ReaderType.ACTUAL)

# Print the result
print(df_LAST)
print(df_SNAPSHOT)
print(df)

returns:

Connection successful
GFC.03-ST121.RPM
time
2024-11-04 12:05:41+01:00 8988.56543
GFC.03-ST121.RPM
time
2024-11-04 12:05:41+01:00 8988.56543
GFC.03-ST121.RPM
time
2024-11-04 12:50:12.501000+01:00 8978.452148
2024-11-04 12:50:53.505000+01:00 8989.392578
2024-11-04 12:51:03.513000+01:00 9000.988281
2024-11-04 12:51:13.511000+01:00 9011.892578
2024-11-04 12:51:33.513000+01:00 9022.156250
2024-11-04 12:52:27.522000+01:00 9011.138672
2024-11-04 12:52:36.523000+01:00 9000.280273
2024-11-04 12:52:45.524000+01:00 9010.517578
2024-11-04 12:53:15.531000+01:00 9021.043945
2024-11-04 12:53:24.532000+01:00 9032.085938
2024-11-04 12:53:29.532000+01:00 9021.666992
2024-11-04 12:53:33.533000+01:00 9031.952148
2024-11-04 12:53:53.535000+01:00 9042.305664
2024-11-04 12:53:57.535000+01:00 9032.219727
2024-11-04 12:54:12.541000+01:00 9042.305664
2024-11-04 12:54:20.542000+01:00 9031.284180
2024-11-04 12:55:12.551000+01:00 9042.038086
2024-11-04 12:56:31.563000+01:00 9053.131836
2024-11-04 12:57:19.571000+01:00 9042.886719
2024-11-04 12:57:45.574000+01:00 9032.442383
2024-11-04 12:58:31.583000+01:00 9021.310547

where the data point: 2024-11-04 12:58:31.583000+01:00 9021.310547 is the actual last datapoint.

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