Product Manual

12
The number of bits sent by the PC-400 is controlled by the data bits, parity and
stop bit configuration. The PC-400 is factory set for eight bits, no parity and one
stop bit. This means that the eight bits following the start bit will be data,
followed by a stop bit. The stop bit signals the end of the data and permits the
bit timer a chance to reset itself before the next data byte is sent. No parity bits
are sent.
Printer Modes:
The PC-400 offers four different print control modes. These modes dictate when
data is transmitted though the serial port.
Transmit on demand (tod): In this mode, scale data is transmitted
whenever a print request is received from the serial port. The scale must be
stable and the weight must be valid (no error codes displayed) before data is
printed.
Continuous print (CP): In continuous print, data is transmitted each time the
scale has a reading ready (each time the display is updated with new data).
Readings which occur when the scale is in motion are called out by the
abbreviation “MOT.” following the data.
Auto Print 1 (AP1): Auto Print 1 transmits the first scale reading after the
scale leaves motion. The reading must be stable and must be a valid reading
before it can be sent.
Auto Print 2 (AP2): Like Auto Print 1, Auto Print 2 transmits the first scale
reading following the scale leaving motion. In Auto Print 2, no further
readings will be sent until the scale returns to displayed zero. The reading
must be stable and must be a valid reading before it can be sent.