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Operators Manual
ALS 230
Release 11/05 Page 51 Serial interface
7. Serial interface
The machine has a serial interface according to the standard RS232C. Via this interface
parameters can be adjusted. All received commands are tested for syntax and legal value
range.
Invalid commands and parameters are ignored. An error message is not given in this case.
All commands received over the serial interface are tested for syntax and range; invalid
commands and out of range parameter values are ignored. A warning message is not given in
these cases. However in the case of framing, parity or overrun errors the warning "W__3" is
generated.
The commands are made up of sequences of ASCII characters. Each command starts with "#"
and "!" followed by a 4 character code. The reception of the "#" character indicates the start of
a new command to the machine.
The codes are similar to the parameter names shown in the display.
7.1 Data of the serial interface
The pin connection of the interface plug is shown in the table below.
Dispenser connector Signal description PC
25 pol D-
Sub
9 pol D-
Sub
Direction Code Description 25 pol 9 pol
Socket 2 3 Output TxD Transmit data 3 2
Socket 3 2 Input RxD Receive data 2 3
Socket 5 8 Input CTS Clear to send 4 7
Socket 4 7 Output RTS Request to send 5 8
Socket 7 5 GND 7 5
Socket 20 4 Output DTR 6 6
Socket 24 (if jumper
on)
+ 10V For external use 8
All other pins are not connected.
Adjustable data values
Baudrate 150, 300, 600, 1200, 2400, 4800, 9600, 19200 Baud
Data bits 7 or 8 bits
Stop bits 1 or 2 bits
Parity No Parity, Parity bit always 0, odd or even parity
Handshake RTS/CTS
Factory interface deactivated, at reactivation the parameters will be set to 8 data bits, 2
stop bits and no parity bit.