Experimental Physics and
Industrial Control System

Mark Rivers <[email protected]> · Wed, 27 Dec 2017 13:05:14 +0000

> 2017/12/27 09:40:17.041470 serial0 D08-DI-LVDT:getChannelA: Input "<02><01><00><00><00><1e><01><0a>" does not match format "%x"

Your device is not returning hex numbers (i.e. ASCII characters from 0 to F) but rather binary numbers.

I took a quick look at the manual for the MP2000.  It looks like the response you receive should be the following:

CommandID DataString VerifyByte 0x0d

This does not match what you actually received since there is no 0d in the received string.  What are the characters you are sending in your protocol supposed to do?

You probably need to use the Raw Long Converter (%r)   See the descriptions and examples here:

http://epics.web.psi.ch/software/streamdevice/doc/formats.html

Mark

________________________________
From: [email protected] <[email protected]> on behalf of Basil Aljamal <[email protected]>
Sent: Wednesday, December 27, 2017 1:50 AM
To: [email protected]
Subject: read data from mp2000 LVDT Controller

Dear all,

I have a  mp2000 LVDT Controller and I want to get channels reading via serial communication, channel data return as 8 bytes in hexadecimal but the problem I can't parse this data to PV record. I have tried %x format converter but it doesn't work.

This the message that i got in iocshell:

2017/12/27 09:40:17.041470 serial0 D08-DI-LVDT:getChannelA: Input "<02><01><00><00><00><1e><01><0a>" does not match format "%x"

This is a part of my protocol file that belongs to channel A reading:

getChanA
{
        out "S0 \x0d";
        out "\x11 \x0d";
        in  "%x";
        out "\x13 \x0d";
}

Best regards,
Basil aljamal

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System