INFICON VGC401 Single-Channel Controller - Manual (Page 55)

tinb01e1-f (2011-07) VGC401.om
55
5 Communication (Serial Interface)
The serial interface is used for communication between
the VGC401 and a computer. A terminal can be con-
nected for test purposes.
When the VGC401 is put into operation, it starts trans-
mitting measured values in intervals of 1 s. As soon as
the first character is transferred to the VGC401, the
automatic transmission of measured values stops. After
the necessary inquiries or parameter modifications have
been made, the transmission of measured values can be
started again with the
COM command ( → 61).
Pin assignment of the 9-pin D-Sub connector and RS232
cable
→ 25.
The data transmission is bi-directional, i.e. data and
control commands can be transmitted in either direction.
1 start bit
8 data bits
No parity bit
1 stop bit
No hardware handshake
5.1 RS232C Interface
Connection diagram,
connection cable
5.1.1 Data Transmission
Data format