Hach-Lange PHOSPHAX indoor sc - Manual (Page 99)

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Appendix B Fieldbus
For general information about field bus control refer to the appropriate controller manuals
and to the register list (
Table 8 on page 101 ). A configuration file is needed for the use
with an OPC server. Contact the manufacturer for further information.
B.1 Fieldbus control
To start the field bus control select
MAINTENANCE>TEST/MAINT>FIELDBUS>ENABLED.
Note: For safety reasons the field bus control is temporarily disabled, when the analyzer is set to the
service state in the menu system. To enable again the field bus control , select START in the
SERVICE menu.
When the service state of the instrument is activated through the field bus, the field bus
control remains active.
Important Note: Make sure that no one is working on the analyzer when an action
through the field bus will be started!
The field bus control registers (40071 to 40078) will be set to FFFFh (65635dec) if the field
bus is disabled for any reason.
To initiate an action: enter "1" to the register for the required action (40072 to 40078), then
enter "1" to the control register 40071. The requested action is accepted when both
registers return to "0". When the instrument is waiting between measurements (long
measuring intervals) a measurement can be forced by entering "1" to register 40072 and
40071. The measurement will be initiated by 5 minutes.
Note: Ongoing internal processes like cleaning are interrupted by a forced measurement. The
interrupted process will be started again after the forced measurement. A discharged value will be
discarded before the measurement. A forced measurement during a calibration process possibly
have higher deviations from the true value than during a normal operation.
Important Note: Do not change the listed register addresses or other values, otherwise
the instrument may malfunction or become inoperable.
B.2 Remote controlled measurement series
To take remote controlled measurement series (no automatic measurement with fixed
interval) start the following procedure.
1. Select MAINTENANCE>TEST/MAINT>FIELDBUS>ENABLED to enable the START
BY BUS feature.
2. Select CONFIGURE>MEASURING>START BY BUS>YES.
Refer to menu system for other options. It is recommended to set AVERAGE either to
"1" or to an even divider of NUMBER OF MEAS or to the same number as NUMBER
OF MEAS to avoid measurements which are not averaged.
Note: For safety reasons the field bus control and START BY BUS are temporarily disabled, when
the analyzer is set to service state in the menu system. To enable again START BY BUS select
MAINTENANCE>TEST/MAINT>START.
When the service state of the instrument is activated through the field bus, the field bus
control remains active.
Important Note: Make sure that no one is working on the analyzer when an action
through the field bus will be started!
Important Note: Do not try to change the listed register addresses, otherwise the
instrument may malfunction or become inoperable.