TB20, strain gauge weighing module | Edition 1 | 21.12.2018
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If, the offset value is changed following the definition of the sampling points, the sampling points are
lowered or raised by the offset value.
5.2.8
Wire break test of the measuring lines
A wire break test of the AI+ Sense line can be carried out with a control command. The wire break test
briefly interrupts the continuous measurement.
The wire break test is completed when the "Control command has been executed" IB 5 Bit 7 has been
set. When a wire break is determined, the error bit "Line break (=1)" IB 5 Bit 2 is set in the response
data.
The error bit "Line break (=1)" IB 5 Bit 2 is displayed in the TB20 ToolBox in online operation.
Following evaluation, the user is to reset the error bit "Line break (=1)" IB 5 Bit 2 via the
"Acknowledgment for control command has been executed" OB 5 Bit 7. In the process, the error bit
"Line break (=1)" IB 5 Bit 2 is also reset, see chapter 9.1.
5.2.9
Monitoring of the feed voltage
A minimum and a maximum threshold can be configured for the monitoring of the feed voltage. By
way of a 2nd measurement channel, the bridge feed voltage is determined cyclically with active
monitoring and checked for the broaching of limit values. The measurement of the feed voltage
briefly interrupts the continuous measurement. The voltage range from 3.7 V – 6.5 V can be
monitored. The monitoring limits can be configured within this range.
The monitoring of the bridge feed voltage must always be simultaneously deactivated for min. and max.
(both limit values 0) or activated (both limit values within the valid range).
No monitoring limit can be configured in the voltage range from 0 V to 3.7 V.
5.2.10
Setting, saving and displaying values
When offset and sampling points are loaded into the weighing module, these values are stored in
non-volatile memory in the weighing module:
The successful loading of the values is checked while loading.
A change to the configuration with regard to the running time is possible.
Using the control commands for issuing, the saved/used values for offset and sampling points can
be read.
In the case of a module change, these values for offset and sampling points must be reconfigured.
