10 connection examples, 1 pc on the front interface, 2 modem on front rs232 - interface – VEGA VEGACOM 557 PC-MODEM - Interface User Manual

Page 17

VEGACOM 557 - without protocol

Connection examples

10 Connection examples

The following connections between PC and
VEGACOM 557 are possible to enable ac-
cess to a VEGA processing system from a
PC with VVO or VV via a VEGACOM 557.

• PC on the front interface
• Modem on the front interface

10.1 PC on the front interface

In this example a PC is connected via the
front interface of VEGACOM 557 with the
VEGA processing system.
The front interface is a RS232 C interface.

Procedure:

1. An interlink cable must be used between
PC and VEGACOM 557 (s. chapter 6.2)

2. Parameter adjustment must be made for

the front interface on VEGACOM 557.

Inter

Interface parameter:

face parameter:

DIL-switch on basic board (s. page 15)
For VVO and VV the following parameters

have to be adjusted:
Transmission rate:

9600 Baud

Data format: 8 data bits, 1 Stopbit, no
parity

Note:

Note: If two VEGACOM 557s are operated on
the same DISBUS, two different instrument num-
bers must be adjusted with the DIL-switch SW 5
on the basic board. On LOGBUS this switch is
meaningless.

10.2 Modem on front

RS232 - interface

In this example, a PC is connected via MO-
DEM and the front interface of VEGACOM
557 to the VEGA processing system.
Two analogue modems are applied, in order
to use the telephone net for remote param-
eter adjustment. With ISDN-connection an
additional so called terminal adapter (a/b-
converter) is required, taking over the
adaption of the analogue modem to the
ISDN-net.
For further information see the operating
instructions "Remote parameter adjustment“.

Procedure:

Procedure:
1. Connect modem with the front interface of
VEGACOM 557 (use 1:1 cable attached to
the modem).

2. The automatic modem initialisation must be
activated with VEGACOM 557.

DIL-switch SW4 on the basic board
(s. page 15)

3. The parameter adjustment must be made

for the front interface on VEGACOM 557.

DIL-switch on basic board (s. page 15)
For VVO and VV the following parameters

have to be adjusted:
Transmission rate:

9600 Baud

Data format: 8 data bits, 1 Stopbit, no
parity

Note:

Note: If two VEGACOM 557s are operated on
the same DISBUS, two different instrument
numbers must be adjusted with the DIL-
switch SW 5 on the basic board. On LOG-
BUS this switch is meaningless.