Rice Lake DWM-IV Weighmeter Standard Operators Manual - Manual (Page 46)

described, the user may program up to three (3) preamble characters that are sent
after the STX character and up to three (3) postamble characters which are
transmitted just before the ETX character. These characters may be used for
special purposes such as releasing the paper clamp on a ticket printer or performing
a double wide print out.
All Weight data fields are six (6) active characters in length. If required by the
programmed capacity, this field will be expanded to seven (7) characters to include
the decimal point (2Eh) justified in the proper position within the weight field. Non-
significant leading zeroes will be transmitted as spaces but the least significant three
(3) characters are not zero suppressed.
Data Block Format:
Data Block
where PR is preamble and PO is postamble.
In the format descriptions below, the following abbreviations apply:
U
N represents the programmed units and may be
from zero to seven characters long.
T
R
represents the tare and may be any of the following
depending on the programmed configuration:
1. TR If single register tare is used and tare was entered via pushbutton.
2. TR(K) If single register tare is used and tare was entered via the keyboard.
3. TRx If Ten-Tare Look-up is enabled. ‘x’ represents the tare register currently
selected. Tare value was entered via the pushbutton.
4. TRx(K) Ten-Tare Look-up as in 3. above but entered via the keyboard.
CK
SM
Represents the checksum data which is the sum of the
data previously sent and is in 2's complement binary
notation. The checksum is comprised of two ASCII
hexadecimal characters. These two characters are only
inserted if the 'Checksum Transmit Enable' is enabled.
Page 44