PMElogo.jpg (16797 bytes)
                                                                     Precision Measurement Engineering, Inc.

RS232 COMMUNICATION

SCAMP will communicate with a host computer via RS232 serial interface. This interface is provided mostly for use by PME. To communicate via RS232 you must set up the host computer and connect to the SCAMP.

 
HOST COMPUTER SETUP 

The customer must supply the appropriate host computer software for RS232 communication. This can be the Hyperterminal program in Start\Programs\Accessories\Communication.

To initialize Hyperterminal, select File\New Connection. Select the proper COM port for your computer in the box that appears:


Select OK. Select the settings shown below from the subsequent box:

 

If a different communication program is used, SCAMP’s RS232 I/O communicates at 9600 Baud, with 8 data bits, no parity, and one stop bit. There is no flow control.

 

CONNECTION TO SCAMP

Open SCAMP. Remove the longer electronics cover. Connect the RS232 cable supplied with SCAMP to the connector as shown in the following picture:

 

RS232_IO_small.jpg (91101 bytes)

 

SCAMP COMMANDS

SCAMP will respond to host computer requests. ‘HELP’ brings up a list of possible requests. These are mostly for PME use but a list is provided below:


keyword    function
-------    --------
(Misc)
BANNER     Present TAG-ALONG software header.
BAT        Read batteries and print result.
CEQ        Set channel calibration info.
CPARM      Set channel parameters
DELAYT     Loop NCOUNT times.
DEPTH      Read depth and print result.
ENGUNIT    Return 500 samp avg of chan(s) EU
GETSCB     Restore SCB from block.
HELP       Display this message.
INITREC    Initialize event recorder.
MEASURE    Return 500 samp average of channel(s) Nad
MMCERASE   Erase entire MMC except PF blocks
MMCFILL    Fill or display a block of MMC memory.
MMCSTAT    Display MMC statistics
MYREC      Print current SCB.
OFF        Turn power off.
PFCONTROL  Display PF_Control.
PROSTAT    Display profile statistics
PRCHAN     Display channel current values.
SNUM       Display SCAMP serial number.
STEPT      Step response at NGAIN.

(TESTS)
TEST00     Cycle weight release.
TEST01     Cycle AD power.
TEST02     Increment DAC1A .
TEST03     Select A/D channels sequentially.
TEST04     Ramp offset DAC at gain = 1, bipolar.
TEST05     Ramp gain at offset = 1, bipolar.
TEST06     Step Response at G=1, G=8.
TEST07     Calibrate A/D.
TEST08     Read A/D ground channel.
TEST09     Ramp A/D and print result.
TEST10     Print T, T Grad RMS CR at 4 NGRAD
TESTALL    Perform TEST00 through TEST09 in sequence

Enter any keyword without parameters to see its function.