Sartorius MA100 - Synchronization and Handshake; Data Communication Synchronization; Handshake Mode Configuration; Activating Data Output

Synchronization
During data communication between the
moisture analyzer and an on-line device
(computer), messages consisting of ASCII
characters are transmitted via the interface.
For error-free data communication, the
parameters for baud rate, parity, handshake
mode and character format must be the
same for both units.
You can adapt your moisture analyzer
by setting corresponding parameters in the
Setup menu.
If you do not plug a peripheral device
into the analyzer’s interface port, this will
not generate an error message.
Handshake
The moisture analyzer SBI interface
(Sartorius Balance Interface) has
transmit and receive buffers. You can
define the handshake parameter in
the Setup menu:
– Hardware handshake (CTS/DTR)
– Software handshake (XON, XOFF)
Hardware Handshake
With a hardware handshake, 1 more
character can be transmitted after CTS
(Clear to Send).
Software Handshake
The software handshake is controlled
via XON and XOFF. When a device is
switched on, XON must be transmitted
to enable any connected device to
communicate.
When the software handshake is
configured in the Setup menu, the
hardware handshake becomes active
after the software handshake.
The data transmission sequence
is as follows:
Moisture ––– byte –––> Computer
analyzer ––– byte –––> (receiving
(transmitting ––– byte –––> device)
device) ––– byte –––>
<––– XOFF –––
––– byte –––>
––– byte –––>
…
(Pause)
…
<––– XON –––
––– byte –––>
––– byte –––>
––– byte –––>
––– byte –––>
Transmitting Device:
Once XOFF has been received, it prevents
further transmission of characters.
When XON in received, it re-enables the
transmitting device to send data.
Receiving Device:
To prevent too many control commands
from being received at one time, XON
is not transmitted until the buffer is
almost empty.
Activating Data Output
You can define the data output parameter
so that output is activated either when a
print command is received or automatically
and synchronously with the analyzer
display or at defined intervals (Program:
Printout intermediate results: On:
Print interval).
Data Output by Print Command
The print command can be transmitted by
pressing p or by a software command
(Esc P).
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