50
Explorer
Pro
Command
Character
Description
?
Print current mode
nnnnA
Set Auto Print feature to “nnnn”
(see table).
RS232 COMMAND 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
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. Momen-
tary contact switches must be used.
1
2
3
4
5
6
7
8
9
PRINT *
TARE *
5.2
RS232 Interface
Explorer
Pro
Balances are equipped with a bi-directional 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.
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 left side of the balance, the center, 9-pin male submin-
iature “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 com-
mand (“P”) from a computer.
The output format is illustrated in the RS232 command table
which follows.
N
tical
custm
Pcs
%
mg
g
kg
dwt
ct
oz
oz t
GN
tael
tael
tael
momme
lb
Left Side of of Balance
RS232 Connector
RS232 Commands
All communication is accomplished using standard ASCII
format. Only the characters shown in the following table are
acknowledged by the balance. Invalid command response "ES"
error indicates the balance has not regonized the command.
Commands sent to the balance must be terminated with a car-
riage return (CR) or carriage return-line line feed (CRLF). For
example, a tare command should appear as shown in the
adjacent diagram. Data output by the balance is always termi-
nated with a carriage return - line feed (CRLF).
Summary of Contents for BH350
Page 64: ...56 Explorer Pro NOTES ...
