6-2
CW-80 Checkweigher Installation/Service Manual
Note:
After the CW-80 receives a
simple command, it responds
with the character sequence
[“*”] [EOL], which means
“OK”. This response verifies
that the command was received.
However, this response does not
indicate that a requested action
was completed. For example,
the indicator will respond with
[“*”] [EOL] even if it disallows
a ZERO function.
Command Format Key:
[ ] represents a separate field
of information.
“ ” represents literals which
will appear as shown.
Simple Commands (No Response)
Simple Commands instruct the CW-80 to perform various functions. When
you enter this type of EDP command, the CW-80 will not respond with data,
but rather with an acknowledgement sequence (“*[CR]”).
All available simple commands, response formats, and related syntax
parameters are described in Table 6-1.
Table 6-1.
SIMPLE COMMANDS (NO RESPONSE—ACKNOWLEDGE ONLY)
Command Format:
[SOH][ADDR HIGH][ADDR LOW][COMMAND][CR]
Where:
[SOH]
is a single ASCII character (01 Hex) “Start of Header” that
is a preamble to all bidirectional serial commands.
[ADDR HIGH] is a single ASCII character for the most significant digit of
the two digit Checkweigher Address.
[ADDR LOW]
is a single ASCII character for the least significant digit of
the two digit Checkweigher Address.
[COMMAND]
is a command represented by one or more characters that
instructs the CW-80 to perform a certain function. The list of
available commands is detailed below.
[CR]
is a single ASCII character (1D Hex) “Carriage Return”
used to signify the end of a complete serial command.
“Z”
(ZERO COMMAND)
“B”
(BUFFER ENABLE COMMAND)
“U”
(BUFFER DISABLE COMMAND)
“D”
(DATA BUFFER XMIT / NO CLEAR COMMAND)
“Y”
(DATA BUFFER XMIT AND CLEAR COMMAND)
“H”
(CLEAR BUFFER COMMAND)
“CT”
(CLEAR TARE COMMAND)
“CTG”
(CLEAR TARGET COMMAND)
“CO”
(CLEAR OVER COMMAND)
“CU”
(CLEAR UNDER COMMAND)
“Z”
(ZERO COMMAND)
Requests that the CW-80 perform a Push-Button Zero
function, if able. It must meet the criteria for Zero Band and
Motion status to work. This is active when in the Gross or
Net Weight display mode. The CW-80 acknowledges upon
receipt of command with the Acknowledgment Character
sequence, [“*”] [EOL], if enabled.
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