Red Lion GEMINI 2 - Manual (Page 26)

RECEIVING DATA FROM THE GEMINI 2000
Data is transmitted from the Gemini 2000 when a “Transmit Value” or
“Transmit per Print Options” command is sent to the unit, or when the “PRINT
REQ.” terminal is activated. The Gemini 2000 can transmit 4 values: Count
value, Presets 1 & 2, and Scale Factor. A list of the abbreviations used when the
Gemini 2000 transmits the values are shown below.
CNT - Count Value
PS1 - Preset 1
PS2 - Preset 2
SCF - Scale Factor
A typical transmission, with the “PR.ID” (Print ID) switch in the up position,
is shown below.
The first two digits transmitted are the unit address followed by two blank spaces.
If the unit address is 0, the first locations will be left blank. The next three letters are
the abbreviation for the mnemonic value followed by one blank space. The actual
values are transmitted last. Negative values are indicated by a “-” sign. For positive
values, the “+” sign is not transmitted. Overflowed count values are shown by an
asterisk preceding the most significant digit of the value. The decimal point position
will “float” within the data field depending on the actual value it represents.
For peripheral control purposes, a single line transmission will have a <CR>
attached to the end of the above string. For a “T” command or each line of a block
transmission, only the above character string is sent. For the last line of a block
transmission,a<SP><CR><LF>isattachedtotheendoftheabovecharacterstring.
An example of a typical serial transmission:
3 CNT -1234.56 < CR> < LF>
If the “Print Request” terminal initiates the transmission, a 400 msec delay is
inserted before the transmission to keep multiple transmissions from
overrunning the printer.
When the Print ID switch is in the down position, the unit will not transmit the
characters before the data value (address, Value ID, spaces) or the 400 msec
printer delay. The same above value when transmitted with the “PR.ID” switch
in the down position, is transmitted as: -1234.56 < CR> < LF>
Note: When using the Gemini with a printer, with the “Print ID” switch in the down
position,someprintersmaynotwork,sincetheprinterdelayisnottransmitted.
PRINT OPTIONS
The various Print Options are used mainly in conjunction with a printer and the
Print Request Terminal. They provide a choice of Gemini 2000 data values to be
printed when either the Print Request Terminal is activated or the “Transmit per
Print Options” (P) command is sent to the Gemini 2000. The various Print
Options available are:
1. Print Count Value Only
2. Print Count Value & Presets
3. Print Count Value & Scale Factor
4. Print Count, Presets, & Scale Factor
A typical printout is shown below. The Print Options are selected by setting S4
and S5 on the Serial DIP Switch. See “Serial DIP Switch Set-up” section for the
various switch settings.
1 CNT 000054
1 PS1 000100
1 PS2 000200
1 SCF 01.0000
The Transmit Count and Reset action of the (X) command is available for use
with the Print Options. This option is selected by setting the TRST switch (Serial
switch position 6) in the down position. This capability is useful in a totalizing
application where a “shift total” is desired without shutting down the machine to
take the reading and reset the unit.
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FIG. 4: TRANSMIT COUNT & RESET (TRST) PRINT OPTION TIMING