Instruction manual

ACU-1000 Operations Manual
3-22 Interoperability Now
In systems where only the RS-232 serial port on the rear panel of the ACU-1000 is being used
it may be necessary to change the Baud rate. This can be done directly from the ACU-1000
serial port without having to connect the CPM-4 to a network via Ethernet.
Changing the Serial Port Baud Rate via the Serial Port
If it is necessary to change the CPM-4 serial port baud rate to something other than 115.2K
baud, then the user must use a computer with a terminal program such as MTTY (available for
download from the website) or Hyperterminal (included with Windows) to change the serial
port configuration. These examples show the use of MTTY.
1. Connect to the ACU-1000 serial port at 115200 baud.
2. Enter the command *CONFIG* and press Enter.
3. The ACU should return with “OK”.
4. Enter the desired baud rate using the BAUD command. The example below changes
the baud rate to 9600. Valid baud rates are 300, 1200,2400, 4800, 9600, 19200, 38400,
57600, and 115200. To set the baud rate to 9600 type BAUD 9600 and press Enter.
5. The ACU will show the new baud rate setting.
6. Enter the command SAVE and press Enter.
7. The ACU will reboot at the new baud rate.
Figure 3-4 Reconfiguring the ACU Serial Port Baud Rate