Data-Transfer Parameters - SI Analytics TW alpha plus Operating Manual

Please make sure that the devices in the chain have different addresses assigned. The device address
of the TW alpha plus Titration Sample Changer can be set on the back panel of the device. The address
range is from 00 to 15, depending on the 0 to F switch position. The "3" address is usually defaulted.
When using the device with a Titrator TitroLine
be connected directly downstream of the titration unit.
In this case the RS interface 2 of the last device (Titrator or Piston Burette) is to be set to the 7; 2; no
parameter record. After setting the RS interface, this device must be restarted.
6.3

Data-transfer parameters

The transfer speed of the interfaces can be set using the "Baud Rate" switch ( Fig. 1, item. 4).
Except for the transfer speed, the following parameters are defaulted:
Number of data bits
Number of stop bits
parity check
The "Baud Rate" switch can be used to set a total of 2 different speeds:
4800 baud, 9600 baud. The ex-factory setting of the baud rate is 4800.
In addition to the baud rate, this switch can be used to adapt the device to the mains frequency (50 Hz or 60
Hz) and to specify the use of a COD sample plate. The list below shows the details of the switch positions:
Switch Position Meaning
0 4800 Baud / even Parity / 50 Hz / normal beaker glasses
1 4800 Baud / odd
2 4800 Baud / no
3 9600 Baud / no
4 4800 Baud / even Parity / 60 Hz / normal beaker glasses
5 4800 Baud / odd
6 4800 Baud / no
7 9600 Baud / no
8 4800 Baud / even Parity / 50 Hz / COD reaction vessels according to DIN 38 409, Part 41
9 4800 Baud / odd
A 4800 Baud / no
B 9600 Baud / no
C 4800 Baud / even Parity / 60 Hz / COD reaction vessels according to DIN 38 409, Part 41
D 4800 Baud / odd
E 4800 Baud / no
F 9600 Baud / no
When using the TW alpha plus Titration Sample Changer in combination with devices from SI Analytics
the baud rate is to be set to 4800 including the appropriate options (50 / 60 Hz, normal beaker glasses/COD
reaction vessels).
Extract from the table:
Switch position Meaning
2 4800 Baud / no Parity / 50 Hz / normal beaker glasses
6 4800 Baud / no Parity / 60 Hz / normal beaker glasses
A 4800 Baud / no Parity / 50 Hz / COD reaction vessels according to DIN 38 409, Part 41
E 4800 Baud / no Parity / 60 Hz / COD reaction vessels according to DIN 38 409, Part 41
®
7000, 7750 or 7800, the sample changer must always
= 8
= 1
= even, odd, no
Parity / 50 Hz / normal beaker glasses
Parity / 50 Hz / normal beaker glasses
Parity / 50 Hz / normal beaker glasses
Parity / 60 Hz / normal beaker glasses
Parity / 60 Hz / normal beaker glasses
Parity / 60 Hz / normal beaker glasses
Parity / 50 Hz / COD reaction vessels according to DIN 38 409, Part 41
Parity / 50 Hz / COD reaction vessels according to DIN 38 409, Part 41
Parity / 50 Hz / COD reaction vessels according to DIN 38 409, Part 41
Parity / 60 Hz / COD reaction vessels according to DIN 38 409, Part 41
Parity / 60 Hz / COD reaction vessels according to DIN 38 409, Part 41
Parity / 60 Hz / COD reaction vessels according to DIN 38 409, Part 41
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