Alicat BB9 - Manual (Page 6)

6
Assigning Individual Addresses to Flow or Pressure Devices
In order to communicate with multiple units through a single RS-232 serial port, each
unit must have a unique address.
On units with a standard display and manufactured after November 2005, the device
address can be changed via the RS-232 Communication menu on the front panel of the
device as outlined below.
Change the address from the front panel of a flow or pressure device as follows:
1. Push the MODE button until the SELECT MENU screen is shown.
2. Push the lower left button dynamically labeled “Comm. RS-232”.
3. Push the upper left button dynamically labeled “Select” once to move the selection
arrow down one line to “Unit ID (Current Address)…(New Address)
4. The default address is A.
5. Use the lower left and middle button dynamically labeled “UP” or “DOWN” to change
the address to any letter between A and Z that is unique from other units you intend
to connect to the Multi-Drop Box.
6. The new address is shown at the end of the dotted line.
7. When the desired new address is shown at the end of the dotted line, press the
MODE button to exit the screen and make the address change take affect.
8. It is prudent to put some sort of external label on the device that denotes its address,
though this can be checked at any time by visiting the “Comm. RS-232” screen.
On units manufactured prior to November 2005 and all units without the standard
display, it is necessary to first connect each unit individually (one at a time) to a computer
and assign a unique address. Then connect all of the units to the Multi-Drop Box.
Assign each flow or pressure device a unique address as follows:
1. Make sure the Multi-Drop Box is connected to appropriate power and to the
computer.
2. Connect a DC-62 (or IC-102) cable between the device and any port on the Multi-
Drop Box.
3. If the unit has a display, check to make sure the device powers up properly.
4. Make sure ONLY the unit you want to change is connected.
5. Establish serial communication as outlined in the operating manual for the flow or
pressure device.
6. With the flow or pressure device in polling mode, type *@=NEWADDRESS followed
by the Enter key where NEWADDRESS is any capital letter A thru Z. (e.g. *@=B
followed by the Enter key)