11
PRINT *
TARE *
1 5 V dc (5 mA max.)
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
showninthediagram.Momentary
contact switches must be used.
Field: T CR LF
Length: 1 1 1
TARE COMMAND
RS232 INTERFACERS232 INTERFACE
RS232 INTERFACERS232 INTERFACE
RS232 INTERFACE
ANALYTICAL
Plus 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, 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.
Thefollowingsectionsdescribethehardwareandsoftwareprovidedwiththebalance.
HardwareHardware
HardwareHardware
Hardware
On the rear of the balance, a 9-pin sub-
miniature “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 un-
lesspin5 (CTS)isheld inanONstate (+3
to +15 V dc). Interfaces not utilizing the
CTS handshake may tie pin 5 to pin 6 to
defeat it.
Output FormatsOutput Formats
Output FormatsOutput Formats
Output Formats
Dataoutputcanbeinitiatedinoneofthree
ways: 1) By pressing PRINT; 2) Using the
AutoPrintfeature;3)Sendingaprintcom-
mand (“P”) from a computer.
The output format is illustrated in the
RS232 command table which follows.
RS232 CommandsRS232 Commands
RS232 CommandsRS232 Commands
RS232 Commands
All communication is accomplished using
standard ASCII format. Only the charac-
ters shown in the following table are ac-
knowledged by the balance. Any other
commands, control characters or spaces
are ignored. Commands sent to the bal-
ance must be terminated with a carriage
return (CR) or carriage return-line line
feed (CRLF). For example, a tare com-
mand should appear as shown in the
adjacent diagram. Data output by the bal-
ance is always terminated with a carriage
return - line feed (CRLF).
INSTALLATION