DayTronic 5D40 Gebruiksaanwijzing - Pagina 19

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ERIAL

As shown in Fig. 7, simple two-wire RS232 cabling is

employed for communications between the 3000PLUS

and an external PC. While 3000PLUS / PC serial com-

munications will usually take place through the 3KP

Configurator software described in Section 4, a "termi-

nal emulation" program (either conventional or cus-

tomized) can also be used to issue standard mnemonic

commands to the meter, and to receive meter respons-

es.

The RS232 interface observes a fixed protocol of

19,200 baud, 8 data bits, 1 stop bit, and NO parity—with

no software or hardware "handshake." The Configura-

PC for

Configuration /

Data Acquisition

RECEIVE

TRANSMIT

COMMON

3000PLUS

OMMUNICATIONS

COM

PORT

SHIELD

5D40 I

WITH

NSTRUCTION

2. C

ONNECTIONS

tor software will automatically set to this protocol the

computer COM PORT selected for communications

with the 3000PLUS (see "Setup and Testing of Serial

Communications" in the Configurator's on-line HELP

system).

Separate shielding of the RECEIVE and TRANSMIT lines

is highly recommended, especially if the cable connect-

ing the PC and the 3000PLUS is over three feet in

length. This will prevent electrical noise from causing

"break" signals and other communications errors.

Fig. 7

RS232 Interface Connections

. SB.3

ANUAL V

3KP40 - 2.2