Reference Manual V1.10
Software Versions 3.xx
X300-621-110
Page 37
9.
Serial Outputs
The
instrument
supports a bi-directional RS-232 output and temporary opto-LINK connection,
allowing for a number of serial output types for communications with external devices such as
printers, computers, PLCs or remote displays.
Refer to opto-LINK Activation page 15. For wiring connections and pinouts, refer to Auxiliary
Connection page 9. The instrument computer communications can range from simple automatic
streamed output, through to a command-response system. In addition to the opto-LINK, the
instrument can be programmed and calibrated via the RS-232 serial port. The calibration counter is
incremented when the calibration related steps are accessed via RS-232, the serial port or the opto-
LINK. This means that calibration via the serial port or opto-LINK cannot be carried out without
affecting the certification of a trade installation.
9.1.
Serial Output Types
There are five (5) types of serial output available and selected via (SERIAL:TYPE).
Network Communications (NET)
o
Two network options
–
o
NET
network communications feature is normally used to control indicators remotely
from a central computer, or PLC
o
Instruments can be installed in a Ring Network.
Automatic Weight Output (AUTO)
o
The automatic output is normally used to drive remote displays, a dedicated
o
Select between two standard formats, master/slave and custom
Single Output (SINGLE)
o
The single output produces a single output with the formats selected. It is used to
drive remote displays, a dedicated computer, or PLC communications.
o
Press
<PRINT>
key to transmit in selected format.
o
A long press of the
<PRINT>
key has no effect.
o
Select between two standard formats, master/slave and custom
Printer driving (PRINT)
o
Enables printer driving with either the standard print format or custom depending on
the firmware.
Auto Print (AUTO.PR)
o
A single printout occurs when the weight is stable after being at zero, and higher than
the greater of 20 divisions or zero band.
9.2.
NET - Network Communications
NET Protocol
The
NET
network communications feature is normally used to control
indicators remotely from a central computer, or PLC. A
NET
command and
response might be:
20110150:<CR><LF>
9F110150:07/01/2030 17:29<CR><LF>
Ring Network
Enhancement
Instruments can be installed in a Ring Network. This also requires the central
computer to send additional framing characters, ‘Echo-On’ (=<DC2>
=ASCII 12
H
) and ‘Echo-Off’ (=<DC4> =ASCII 14
H
) around each command. A
Ring Network enhanced
NET
command and response might be: