ULTRA 4 INSTRUCTION MANUAL 
 
44 
Using the Serial Interface 
The RS232 serial interface is used to communicate between the Ultra 4 and a 
PC using the optional Ultra PC and other associated Pulsar software 
packages, to obtain information such as data logging and view echo traces 
upload, download and save parameter files. In addition, it can also be used 
to control or obtain information using a standard PC or other computer base 
equipment. To do so, the settings for control are as follows: baud rate 
19,200, 8 data bits, no parity, 1 stop bit. 
The device should be connected as shown in Chapter 2 Ultra 4 Installation.  
To use the device remotely, you need to log on to start, and log off when 
finished. When logged on, Ultra 4 will show ‘Remote ON’ on the display, 
and “Communicator OFF” when logged off.  
 
All commands should be followed by a carriage return.  When logged on, the 
unit will respond either OK (or a value) if the command is accepted, or NO if 
it is not. 
To log on, send the command  
/ACCESS:pppp where pppp is the passcode (P922). 
To log off, send the command 
/ACCESS:OFF  
To read a parameter value, send the command 
/Pxxx where xxx is the parameter you wish to read, and the Ultra 4 will 
respond with the parameter value. 
To set a parameter, send the command 
/Pxxx:yy where xxx is the parameter number, and yy is the value you wish to 
set it to.