17
Control
To read the MODBUS address
:
unit_id
MA
To set the MODBUS address
:
unit_id
MA
address
address
is the new MODBUS address, an integer from 1–247.
Serial Baud Rate
To read the current baud rate
:
unit_id
NCB
To set the baud rate
:
unit_id
NCB
baud_rate
baud_rate
is the communication rate, per the table below:
Value
Corresponding Baud Rate
0
4800
1
9600
2
19200
3
38400 (default)
4
57600
5
115200
Example:
aNCB 2
(changes baud rate on Instrument A to 19200)
Note:
When changing the instrument’s baud rate, the baud rate for the COM port must
change in time to successfully receive the response confirming the new baud rate. If it
does not, then the baud rate will change on the instrument, but the response from the
serial terminal will not be understood. Since the serial terminal is set to communicate
at a specific baud rate during the initial configuration, you will have to redefine the
terminal baud rate to continue communications.
Command Protocol
The instrument can be switched from BASIS Protocol 2 (described in this manual) to Protocol
1 (described in the BASIS 1 manual).
To read the current command protocol
:
unit_id
P
To switch from Protocol 2 to 1
:
unit_id
P 1
To switch from Protocol 1 to 2
:
unit_id
P2
Note:
There is a space between the command and argument when switching from
protocol 2 to 1 but NOT when switching from protocol 1 to 2.
Example:
aP2
(switch Instrument A to be controlled through BASIS 2 protocol)
BASIS 1 ASCII commands can be found in the BASIS 1 user manual, available at
alicat.com/manuals
.
∆
Caution:
The BASIS 1 protocol only works with flow units of SCCM, SLPM, NCCM, and
NLPM. An error will be returned if you attempt to switch to BASIS 1 protocol for an
instrument with different flow units.
Load Factory Default as Current Configuration
When you reset the instrument, data from the factory area of memory is copied into the
user settings area. The instrument will be completely configured to the factory-set values.
Power cycling the instrument is recommended to ensure that all values are properly used.
To reset the instrument to factory defaults
:
unit_id
FACTORY RESTORE
This command must be entered in ALL CAPITAL LETTERS and with exactly one space between
the words of the command.
