User manual

24 GOSSEN-METRAWATT
9 Data transmission via the RS-232 interface
Stored protocols, measured values of the function test as well as statistic data can be transmitted to
a PC via the RS-232 interface.
For this purpose, connect an interface cable to the PC at the RS-232 connection socket (4) of the
PSI module. Thereby, the PSI module must not be active!
Attention!
Data transmission to a PC via the RS-232 interface is not possible when the PSI mod-
ule is active for data entry (for top and bottom lines, for protocol texts and for setting
the clock)!
Note
The software packages PC.doc, PC.base and SE-Q.base are available for data acquisi-
tion and data management as well as for protocol establishment with the PC. These
packages also include the required interface cable.
Note
Data transmission from the PSI module to the PC is also possible when the PSI module
is not connected to the SECUTEST 0701S and switched to battery mode (see section 8,
page 22).
9.1 Interface definition and interface protocol
The interface of the SECUTEST PSI complies with the RS-232 standard.
Technical data:
Baud rate 9600 bd, fixed Length of characters 8 bits
Parity None Stop bit 1
Data protocol to DIN 19 244,
X_ON/X_OFF protocol
The interface information is processed via an interrupt routine, thus, the PSI module is continuously
on standby. In addition, the character <CR>=OD
H
is used to signal the end of a message. If hex
numbers are to be transmitted, they must be converted into two ASCII-HEX-BCD characters. The
characters '_' (=178
D
=B2
H
) is thus presented as 'B2'.
Control characters:
^D Echo on (useful for terminal mode; entry of instructions via termnianl program of an
external PC)
^F Echo off (for remote control via processing program of an external PC
e.g. via DOS software PC.doc)
^S / ^Q SW-handshake
CR Instruction conclusion
LF Ignored (but sent as line end)
!