Metrohm 788 IC Filtration Sample Processor - Manual (Page 135)

5.2 RS232 interface
788 IC Filtration Sample Processor
127
5.2.7 Data transmission protocol
The RS232 interface of the 788 IC Filtration Sample Processor is con-
figured as DTE (Data Terminal Equipment) with the following technical
specifications:
x Standard
Data interface in accordance with EIA standard
RS 232C (DIN 66020, page 1), transmission pa-
rameters can be set under 'configura-
tion/RS232 settings' , see section 4.2.1.
x Control characters C
R
DEC 13 HEX 0D
L
F
DEC 10 HEX 0A
XON DEC 17 HEX 11
XOFF DEC 19 HEX 13
x Max. line length
80 characters + C
R
L
F
x Mode
Full duplex (simultaneous transmission and re-
ceiving)
Restriction:
If data are first received by the interface, trans-
mission is not started until the receipt is at an
end.
x Cable
For interconnection of the 788 IC Filtration
Sample Processor with third-party devices, only
a shielded data cable may be used (e.g.
METROHM D.104.0201). The cable shield must
be perfectly earthed at both devices (pay atten-
tion to current loops: always use star earthing).
Use only connectors with sufficient shielding
(e.g. Metrohm K.210.0001 with K.210.9004).
x Cable length
max. ca. 15 m
Start 7 or 8 data bits parity bit 1 or 2 stop bits