BEAMEX FB150 - 6 Digital Communication Interface; Wiring; Setup; Serial Operation

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Digital communication interface
Wiring
6 Digital communication interface
The Field Temperature Block is capable of communicating with and being controlled
by other equipment through the RS-232 digital interface.
With a digital interface the instrument may be connected to a computer or other equip-
ment. This allows the user to input the set-point temperature, monitor the temperature,
communicate with the readout to obtain measurement data, control operating condi-
tions and access any of the other controller functions, all using remote communica-
tions equipment. The RS-232 serial interface allows serial digital communications
over fairly long distances. With the serial interface, the user may access any of the
functions, parameters and settings discussed in this section.
6.1 Wiring
The serial communications cable attaches to the instrument through the DB-9 con-
nector at the front of the instrument. Figure 14 on next page, shows the pin-out of this
connector and suggested cable wiring. To eliminate noise, the serial cable should be
shielded with low resistance between the connector (DB9) and the shield.
6.1.1 Setup
Before operation the serial interface must rst be set up by programming the BAUD
rate and other conguration parameters. These parameters are programmed within
the communications menu. The serial interface parameters can be accessed from the
main menu by MENU|SYSTEM MENU|SYSTEM SETUP|COMM SETUP|. For more
information on the serial interface parameters, see Section 5.2.3.1.2COMM SETUP on
page 33.
6.1.2 Serial Operation
The serial communications uses 8 data bits, one stop bit, and no parity. The set-
point and other commands may be sent via the serial interface to set the temperature
set-point and view or program the various parameters. The interface commands are
discussed in the “Digital Interface” section.