SCT Weight Transmitter – 20 Series Technical Manual
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• Incorrect reception: &&aa?\ckckCR
Tare Weight Zero Setting
The PC transmit the following ASCII string containing the zeroing command:
• $aazckckCR$01z7BCR; in which: z = weight zeroing command (122 ASCII)
Possible instrument responses:
• Correct reception: &aaxxxxxxt\ckckCR
Table 3-42. Zeroing Command String Definition
Data
Definition
xxxxxx
6 characters for the required weight value.
t
weight identification code (116 ASCII).
• Incorrect reception: &&aa?\ckckCR
• If the instrument is not in gross weight displaying condition, the response is: &aa#CR
IMPORTANT
Example: Weight zero setting for instrument with address 2:
For the calibration, make sure that the scale is empty and the instrument measures a corresponding mV signal.
query: $02z78(Cr) response: &02000000t\76(Cr)
For a correct weight zero setting the read value (response) must be 0 (in the string 000000).
The zero values are stored to the EEPROM memory. Please note that the number of writes allowed is limited
(about 100000). If it is necessary to reset the weight quite often, it is recommended to perform it by PC or PLC
program, keeping in mind the weight deviation respect to the zero instrument.
Weight (Span) Calibration (With Test Weights)
After having performed the Tare Weight Zero Setting, this function allows correct calibration to be done using test weights of
known value and, if necessary, any deviations of the indicated value from the known value will be corrected.
Load the test weight onto the scale using as high a percentage of the maximum quantity to be weighed as possible. Otherwise
make sure that the instrument measures a corresponding mV signal.
The PC sends the following ASCII string containing the calibration command:
$aasxxxxxxckckCR
in which:
Possible instrument responses:
• Correct reception: &aaxxxxxxt\ckckCR
Table 3-44. Calibration
Response Definitions
Data
Definition
t
gross weight identification code (116 ASCII).
xxxxxx
6 characters to indicate the current weight value.
6
for division value = 10
7
for division value = 20
8
for division value = 50
9
for division value = 100
Data
Definition
s
calibration command (115 ASCII)
xxxxxx
6 characters for test weight value.
Table 3-43. Calibration Command String Definitions
Response Value
Definition
Table 3-41. Decimal and Division Definitions
Содержание SCT20-AN
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