Vaisala HMT330 Manuel d'utilisateur Page 205

  • Télécharger
  • Ajouter à mon manuel
  • Imprimer
  • Page
    / 209
  • Table des matières
  • MARQUE LIVRES
  • Noté. / 5. Basé sur avis des utilisateurs
Vue de la page 204
Appendix C _________________________________________________________ Modbus Reference
VAISALA _______________________________________________________________________ 203
NOTE
Basic status information of
the HMT330 transmitter
is also available with
the Read Exception Status function code 07.
For details, see section
Exception Status Outputs
on page 204.
Configuration Registers
Configuration parameter registers are used to configure the measurement.
Writing out-of-range values is silently ignored.
Table 43 Configuration Parameter Registers
Name
Float
Integer
Valid Range
Pressure setting default
value
0769…0770
1025 (×1)
0…9999 hPa
Pressure setting
temporary value
0771…0772
1026 (×1)
0…9999 hPa
Chemical purge interval
0773…0774
1027 (×1)
10…2880 min
Molecular weight for
ppm
w
calculation
0775…0776
1028 (×0.001)
0…999.999
g/mol
If you modify the pressure setting repeatedly, modify the temporary
value at register 0771...0772 (1026) instead of the permanent setting at
register 0769…0770 (1025). Set the temporary value to zero to return to
the default pressure setting.
Non-metric units are not available on Modbus. If they are needed,
calculate the conversion outside the transmitter.
Configuration flags are used to select some basic options of the
instrument and to manually start the sensor operations.
Table 44 Configuration Flag Registers
Name
Address
Description
Standard filtering on/off
1281
1 = Filtering on
Extended filtering on/off
1282
1 = Extended filtering on
Automatic chemical purge on/off
1283
1 = Automatic purge on.
See configuration register
0773…0774 (1027).
Start-up chemical purge on/off
1284
1 = Start-up purge on
Chemical purge in progress
1285
1 = Purge in progress
(write 1 for manual start)
Sensor heating on/off
1287
1 = Sensor heating on
(optional feature)
Flags 1281 and 1282 are mutually exclusive.
Some of the configuration registers might not have an effect depending
on the instrument model and configuration.
Vue de la page 204
1 2 ... 200 201 202 203 204 205 206 207 208 209

Commentaires sur ces manuels

Pas de commentaire