Condec DLR334 - Manual (Page 4)

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♦ General commands (Zero, etc.).
♦ Display commands (Min,Max, etc.).
♦ Pressure calibration (Zero Cal, etc.).
Data request code = < R > character (3FH).
‘R’ commands requesting data from the host to the DLR.
♦
Pressure data.
♦ Status.
♦ Setup data.
Calibration data.
Data entry code = < E > character (45H).
‘E’ commands with data sent from host to be entered into the DLR.
♦
Setup data.
♦ Calibration data.
For complete listing of command codes see Table II.
4.0 DATA FORMAT:
4.1 GENERAL:
! When data is transmitted it is always bracketed with the ‘{‘ and ‘}’ characters.
! The separation character ‘|’ (7CH) is used to separate data in a string.
! All DLR recalled data has leading zero suppression with the zeros transmitted as spaces.
! All data entered into the DLR can have leading zero suppression with the zeros transmitted
as spaces but is not required.
! Summary of data formats:
PRESSURE:
STATUS:
WEIGHT:
INPUT:
|
OUTPUT: |
SETUP: || - - -
5.0 RESPONSE:
! In the print/port 1/duplex setup the response by the DLR from the direct commands and data entry
commands can be selected for ‘None’ or Echo’.
‘None’: no response is given a direct cmd (D) or data entry cmd (E) if valid or invalid.
‘Echo’: the command (direct or entry) is echoed as received if valid; the start of transmission
character is returned with a ‘:’ not the ‘*’ character. If invalid a _NAK_ is returned
‘Ack/Nak’: instead of echoing back the received command code and entered data the DLR
responds with ‘ACK’ (41H, 43H & 48H) in place of the code. If an error in received data is
detected the DLR responds with ‘NAK’(4EH, 41H & 48H).
Ack response: :ACK
Nak response: :NAK
! An invalid input consists of the following:
♦ Parity error.
♦ Check error if enabled.
♦ Invalid command code.
♦ Invalid data format.
Response in Echo or Ack/Nak mode = :NAK