Hello folks, I am trying to establish communication with a VACOM MVC-3 Vacuum gauge. The manual for the gauge can be found at:
https://www.vacom.de/en/downloads/category/775-total-pressure-measurement?download=2440:mvc-3
I am having problems understanding how to communicate with the device. I am using the built in COMM port (Port 1) of my computer (Windows 10 Enterprise, 64 bit, version 10.0.18363 build 18363) and I have configured the device to have a baud rate of 9600 and to use RS232 as described on page 45 of the manual.
I am trying to communicate with the device in NI Max as I get the feeling from these pages that this is the best way to start..
In Visa I set the Baud rate =9600
data bits = 8
stop bit=1
parity=none
flow control= none
I enabled a termination character.
End mode for reads=TermChar
End mode for writes = Termchar
Termination character= carrage Return \r
Now I started trying to communicate with the simplest command possible , RVN<CR>. (to read the version number P 52 of the manual) and I always get a read error Visa: Hex 0xBFFF0015 Timeout...
In the manual I noticed that they want you to enter the commands in ascii. Does that mean I should convert RVN<CR> to 82 86 78 0x0D or something like that?
Should I write the command and just read, or is there some kind of acknowledgement command that needs to be sent first. (I get vibes from this from page 49 but I am not sure)
Also, since Visa is configured to use \r format as the termination character, does this pose a problem for communicating with this kind of device?
Thank you in advance people.
Happy Weekend
DrRob2020