Printer Modes:
The 7000XL and 7000 offer four different print control modes. These
modes determine when the printer data is sent.
Transmit on demand (tod): In this mode, scale data is transmitted
whenever the print button on the scale (or a remote print) is pressed. The
scale must be stable and the scale value must be valid before the data is
printed. When software handshaking is on, a print request is created
whenever a "W" is received from the bi-directional serial input.
Continuous print (CP): In continuous print, data is transmitted each time
the scale has a reading ready. Readings which occur while the scale is in
motion are indicated by the abbreviation "MOT." following the data.
Auto Print 1 (AP1): Auto Print 1 automatically transmits the first valid scale
reading after the scale becomes stable.
Auto Print 2 (AP2): Like Auto Print 1, Auto Print 2 transmits the first stable
scale reading, but in Auto Print 2, no further readings will be sent until the
scale returns to displayed zero. The scale must be stable and the reading
must be valid before it can be sent.
Data output format:
In order for the serial data sent from the 7000XL or 7000 to be useful, the
data must be organized in such a way as to be easily read. To
accomplish this, the 7000XL and the 7000 format the displayed data with
additional text to communicate the active units and the scale status
during the reading.
Format "F0": The basic data format used by the 7000XL and the 7000 is
illustrated in Fig. 1 through Fig. 3. Each line of data begins with an STX
character (start of text) followed by a polarity sign which indicates the
reading polarity. Next the weight data is sent. Six digits are sent with a
decimal point inserted in the correct position. After the weight data is
sent, a space followed by the units are added to the string. When motion
is present, another space is inserted followed by "MOT." The string is
terminated by adding a carriage return and a line feed.
In the case of lb-oz measurements, the pounds data is placed after the
polarity sign. A space followed by "lb" and another space is added to the
pounds data. Ounce data is then sent with a decimal point inserted as
needed. Once again a space is inserted after the weight data followed by
"oz." Only six digits are sent in the lb-oz mode so the allocation of these
digits depend on the ounces resolution. Refer to Fig. 2 for details.
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