Навигация по разделу "Инструкции, софт и прошивки": Zipstore.ru > Инструкции, софт и прошивки > Меттлер Толедо > Протоколы для простых весов
ICL
Data Format
9600 Baud (select 2400, 4800 or 9600)
7 data bits (select 7 or 8)
Even parity (select Even, None or Odd parity)
1 stop bit (select 1 or 2 stop bit)
Handshaking
For PC DB25 serial port connector: Jumper 4 to 5, and 6, 8, & 20 together.
For PC DB9 serial port connector: Jumper 4 to 6 and 7 to 8.
Command Descriptions
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Command |
COMMENTS |
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ENQ (05h) |
Starts the communication sequence |
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ACK (06h) |
Data Available |
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CAN (18h) |
Repeat weighing |
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NAK (15h) |
No acknowledgement |
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NUL (00h) |
No data available |
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DC1 (11h) |
Data Request |
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STX (02h) |
Start of text |
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ID |
Information byte, broken down into the following bits:
Bit 3 - Logic 1 Bit 4 - Logic 1 means under/over range Bit 5 - Logic 1 Bit 6 - Logic 1 indicates non-AVR capacities |
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Weight |
5 bytes with MSD first. If the scale registers underweight or overweight a data string with data of zero (00) will be transmitted with bit 4 (X) of the ID byte set to 1. In cases where MSD or LSD are not required a `NUL' character will be transmitted in the unused position. |
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BCC |
Block Check Character calculated as the even column parity (Longitudinal Redundancy Check) of all characters except the STX and ETX. |
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ETX (03h) |
End of text |
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CR (0dh) |
Data received and compared correctly |
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Command Flow
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ECR |
Scale |
COMMENTS |
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ENQ (05h) |
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ACK (06h) |
Data Available. Errors could be: CAN - repeat weighing NAK - no acknowledgement NUL - no data available |
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DC1 (11h) |
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Data Request Errors could be: NAK – no acknowledgement |
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STX ID W5W4W3W2W1 BCC ETX |
Transmitted Data |
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STX ID W5W4W3W2W1 BCC ETX |
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Confirm Data Errors could be: ACK – Data not confirmed NAK – receive error or scale error detected. |
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CR (0dh) |
Data confirmed, CAN response to ENQ is activated until current transaction is cleared. |
Note: The POS can request and receive additional weight data from the scale before returning the verification weight but the verification weight must equal the last weight sent by the scale.