133 - 23/May/97
•
INTERFACE REQUIREMENTS
The RS422 interface wiring is based on one-to-
one, no multidrop, principle. Four wires are
used. With RS422, you can transmit and
receive data simultaneously (full-duplex).
The RS485 half-duplex uses only two wires. It
allows multidrop communication. With RS485
half-duplex, you cannot transmit and receive
simultaneously.
Vickers supports RS485 full-duplex with four
wires (RS422 compatible). Up to 99 DBM and
up to 15 DBS drives can be connected in
multidrop configuration.
⇒
RS232/485 CONVERTER KIT
This very small external converter provides a
full-duplex interface between PC and
DBM/DBS.
The converter must be fit directly into a COM
port (RS232) of a PC. This way the link
becomes purely RS485, less susceptible to
noise and able to transmit over much longer
distances than RS232.
The kit includes:
- the converter to fit into DB25-S connector of
the PC (COM port)
The DTE/DCE switch of the converter must be set to DCE
(Data Communications Equipment)
- a DB25 to DB9 interface (to be used if the PC
COM port is DB9-S)
- a 2 m cable to connect the converter to DBM
J10 connector or DBS J2 connector
⇒
An opto-isolated PC card RS 485 full-duplex
is also available. The following wiring must
be used.
RS485 full duplex
DBM J10 Connector
Connector
DBS J2 Connector
Male
Female
•
PC REQUIREMENTS
- 80286, 80386, 80486 microprocessor or
better
- Hard disk and one diskette drive. You need 2
Mbytes of disk space and 512 kbytes of RAM
- CGA, EGA, VGA, MCGA graphics card (color
VGA recommended)
- MS-DOS 6.2 or later
- ANSI.SYS in CONFIG.SYS
•
DBTALK PROGRAM
The DBTALK program is available on floppy
disk
•
INSTALL PROGRAM
- Insert diskette into drive A or drive B
- Type <a:install> (or <b:install>)
The installation program will create the Directory
C:\DBTALK, will copy all the files in this new directory
and will start the program
•
START PROGRAM (after the first
installation)
- Type <cd dbtalk>
- Type <start>
•
MOVE IN THE PROGRAM
Start the selected procedure
Select the field
Reread parameters
Move up/down
Go to previous/next screen
Exit/Go to previous menu
•
SELECT PROGRAM
⇒
DBM linker
⇒
DBS linker
⇒
PDBS Linker (see PDBS Application Manual)
⇒
Setup
Esc
Space
(+Tx)
(-Tx)
(+Rx)
(-Rx)
(Gnd)
1 (+Rx)
2
3 (+Tx)
4 - 5
6 (-Rx)
7 (Gnd)
8 (-Tx)
9
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