I found some info about the Multimeter:
I´ve got two possible modes to get data from the DMM
1. by using send-code:
M: DMM sends stored data
C: DMM resets stored data
😧 DMM sends display-data
2. without send-code
if the COMM-button off DMM is pressed, DTR has to be set to Lo by PC. DMM will
send display every second
transferrate is 1200 baud
charakter code 7-bit ASCII
no parity
stop-bits 2
length of string 14 byte
I also found a short MS-Quickbasic-file:
CLS
OPEN "COM1:1200,N,7,2,RS,CD,DS,CD" for INPUT A$
INPUT #2,A$
PRINT A$
CLOSE #2
END
I used the serial-communication VI this time in order to give the DMM
commands ( M,C,D) but the DMM didn´t answer. I set the
data-communication-parameters in the sub VI´s, maybe that was the fault. Have
you got any idea
what´s wrong??
To what, in your opinion do the characters RS,CD,DS,CD in the "OPEN COM1
command-line stand for ??
Thanks, for your help,
Oliver