Communications Manual Rev 3.10 Software Versions 3.xx
Page 44
003R-618-310
12.8. Glossary Terms
Term Definition
Calibration
Parameter
An adjustable parameter that can affect measurement or performance
accuracy and, due to its nature, needs to be updated on an ongoing basis to
maintain device accuracy, eg., span adjustments, linearisation factors, and
coarse zero adjustments
COMM
The communications protocol used to communicate with the R300 Series
Configuration
Parameter
An adjustable or selectable parameter for a device feature that can affect the
accuracy of a transaction or can significantly increase the potential for
fraudulent use of the device and, due to its nature, needs to be updated only
during device installation or upon replacement of a component, eg., division
value (increment), sensor range, and units of measurement.
Count-by The smallest change in weight units that the display can show. See also
Resolution.
CRC Cyclic Redundancy Check
Division A single graduation.
EEPROM Electrically Erasable Programmable Read-Only Memory
FIR Finite Impulse Response
Full Scale The maximum gross weight allowed on the scale. This is used to detect
overload and underload conditions, etc.
Graduations The maximum number of display steps between zero gross load and full
capacity gross load. It is equal to the full scale divided by the resolution.
LED Light Emitting Diode
NTEP National Type Evaluation Program
OIML International Organization of Legal Metrolology
opto-LINK Cable
opto-isolated infrared communications link cable
PLC Programmable Logic Controller
Range Total change in weight between zero gross load and full capacity gross load
(ie. the nominated total capacity of the scale). It is always given in displayed
weight units.
Register
Resolution The smallest change in weight units that the display can show. See also
Count-by.
Ring Network A network of up to 31 Instruments connected to a central computer
RS-232 Standard for communications hardware layers.
Step-Response The step-response is the time between placing a weight on the scale and the
correct weight reading being displayed.
Transients A temporary voltage oscillation or spike caused by a sudden change of load
(or other external influence).
Units The actual units of measurement (kilograms, tonnes, pounds, etc.).
12.9. List of Figures
Figure 1: Weight Indicator............................................................................................................... 4
Figure 2: RS-232 -– One Instrument to PC using COM Port (DB9)................................................. 7
Figure 3: RS-232 – One Instrument to PC using COM Port (DB25)................................................ 7
Figure 4: RS-232 Short Cable Runs: Ring Network using COM Port (DB9).................................... 8
Figure 5: RS-232 Long Cable Runs: Ring Network using COM Port (DB9) .................................... 9
Figure 6: Commonly used Registers and Commands................................................................... 11
Figure 7: RS-232 Ring Network: Example with Two Instruments .................................................. 13
Figure 8: Streaming Registers Example........................................................................................ 33
Figure 9: TYPE_MENU Example .................................................................................................. 36
12.10. List of Tables
Table 1: opto-LINK vs RS-232 port ............................................................................................... 10
Table 2 COMM Command Format ................................................................................................ 14
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