Hach-Lange AMTAX indoor sc - Manual (Page 111)

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Appendix B Fieldbus Communications
For general information about Fieldbus control, refer to the appropriate controller manuals
and to the register list (
Table 13, page 112 ). 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 Fieldbus control select
MAINTENANCE>TEST/MAINT>FIELDBUS>ENABLED.
Note: For safety reasons, the Fieldbus control is temporarily disabled when the AMTAX sc analyzer
is set to the service state in the menu system. To enable the Fieldbus control , select START in the
SERVICE menu.
When the service state of the instrument is activated through the Fieldbus, the Fieldbus
control remains active.
Important Note: Before starting Fieldbus communications, make sure that no person is
working on the analyzer.
The Fieldbus control registers (40048 to 40058) will be set to FFFFh (65635dec) if the
Fieldbus is disabled.
To initiate an action, enter "1" to the register for the required action (40049 to 40058), then
enter "1" to the control register 40048. 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 40049 and
40048. The measurement will be initiated in 5 minutes.
Note: Ongoing internal processes like calibration and 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 may have higher deviations from the true value than during a normal operation.
Internal processes like calibration and cleaning do not interrupt a measurement.
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 a 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 Fieldbus control and START BY BUS are temporarily disabled when
the AMTAX sc analyzer is set to the service state in the menu system. To enable START BY BUS
select MAINTENANCE>TEST/MAINT>START.
When the service state of the instrument is activated through the Fieldbus, the Fieldbus
control remains active.
Important Note: Before starting Fieldbus communications, make sure that no person is
working on the analyzer.