36
RS232 COMMAND TABLE
CommandCommand
CommandCommand
Command
CharacterCharacter
CharacterCharacter
Character
DescriptionDescription
DescriptionDescription
Description
??
??
? Print current mode
nnnnAnnnnA
nnnnAnnnnA
nnnnA Set Auto Print feature to “nnnn”
(see table).
Field: Mode Stab CR LF
Length: 5 1 1 1
blank if stable
“ ? ” if unstable
nnn = 0 Turns feature OFF
nnn = S Output on stability
nnn = C Output is continuous
nnnn = 1-3600 Sets Auto Print
Interval
5.2 RS232 Interface
Explorer balances are equipped with a bidirectional
RS232 compatible interface for communication with
printers and computers. When the balance is connected
directly to a printer, displayed data can be output at any
time by simply pressing PRINT, or by using the Auto
Print feature.
Connecting the balance to a computer enables you to
operate the balance from the computer, as well as
receive data such as displayed weight, weighing mode,
stability status, etc.
The following sections describe the hardware and
software provided with the balance
Hardware
On the rear of the balance, the right-hand, 9-pin male
subminiature “D” connector is provided for interfacing
to other devices. The pinout and pin connections are
shown in the adjacent illustration.
The balance will not output any data unless pin 5 (CTS)
is held in an ON state (+3 to +15 V dc). Interfaces not
utilizing the CTS handshake may tie pin 5 to pin 6 to
defeat it.
Output Formats
Data output can be initiated in one of three ways: 1) By
pressing PRINT; 2) Using the Auto Print feature; 3)
Sending a print command (“P”) from a computer.
The output format is illustrated in the RS232 command
table which follows.
RS232 Connection
1 N/C
2 Data Out (TXD)
3 Data In (RXD)
4* Tare (External signal)
5 Clear To Send (CTS)
6 Data Terminal Ready (DTR)
7 Ground
8 Request To Send (RTS)
9* Print (External signal)
* External PRINT and/or TARE
switches may be installed
as shown in the diagram.
Momentary contact
switches must be used.
12345
6789
PRINT *
TARE *
RS232 Commands
All communication is accomplished using standard ASCII
format. Characters shown in the following table are
acknowledged by the balance. Invalid command re-
sponse "ES" error indicates the balance has not recog-
nized the command. Commands sent to the balance
must be terminated with a carriage return (CR) or car-
riage return-line line feed (CRLF). For example, a tare
command should appear as shown in the adjacent dia-
gram. Data output by the balance is always terminated
with a carriage return - line feed (CRLF).
Rear of Balance
mg
g
kg
dwt
ct
oz
oz t
GN
tael
tael
tael
momme
lb
N
tical
custm
Pcs
%
