Functions Accessible Through The Rs232 Interface; Monodirectional Data Transmission; Bidirectional Data Transmission - Hexagon TT80 Mode D'emploi

11 FUNCTIONS ACCESSIBLE TROUGH THE RS232 INTERFACE
Both TT80 and TT90 operate based on 2 communication modes using the same transmis-
sion format, i.e. :
Data rate
ASCII code
Start
Stop
Parity

11.1 Monodirectional data transmission

In this mode, the standard cable 04761046 is used. Transfer of a character or a BREAK,
or changes to the DTR status line causes displayed value to be sent back.
Data transfer
TT80 and TT90 in TT80 mode
Mm : ±xxxx.xx <cr/lf>
In : ±.xxxxxx <cr/lf>
Data Request (DTR)
+
50 ms < t < 500 ms
OV
–
Data (RXD)
+
OV
–

11.2 Bidirectional data transmission

This mode uses the standard cable 04761049, allowing the instru-
ment to be controlled over a host computer as instructed (see on
the following page).
4800 bauds
7 bits
1 bit
2 bits
even
TT90 and TT90-UPC
µm : ±xxx.xxx <cr/lf>
mil : ±(x)x.xxxx(x) <cr/lf>
TESA SPC printer or Sub-D
connector 9-pin/m on PC
5
9
Data Request (DTR)
V-(TXD)
V+(RTS)
Data Out (RXD)
6
1
5
9
5
V+ (DTR)
9
Data Request (DTR)
Data In (TXD)
V– (RTS)
V-(TXD)
Data Out (RXD)
V+(RTS)
6
Data Out (RXD)
1
6
1
TESA SPC printer or Sub-D
connector 9-pin/m on PC
5
9
V+ (DTR)
Data In (TXD)
V– (RTS)
Data Out (RXD)
6
1
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