Re: Protocol format issues in StreamDevice during COMBIVAC CM 52 device commissioning.

["Hu, Yong via Tech-talk" <tech-talk@aps.anl.gov>]

Hi Feng,

In the mbbo record "$(P)$(R):Channel",  you are using field(ZRVL, "49") probably because of "The values 1, 2, and 3 are character digits". However, you will get "Illegal Value" if you type "caget $(P)$(R):Channel". You cannot assign any value greater 15 to the value fields (ZRVL, ONVL, etc.) 

Maybe you should use field(ZRVL, "1") instead? If you really want to use “49”, you have to use "Raw Soft Channel" for DTYP.

BTW, you should remove either field(FLNK, "$(P)$(R):RPV") OR field(SCAN, "1 second")

Cheers,

Yong

NSLS-2 Accelerator Controls

From: Tech-talk <tech-talk-bounces@aps.anl.gov> on behalf of Marco Filho via Tech-talk <tech-talk@aps.anl.gov>
Date: Wednesday, December 10, 2025 at 8:48 AM
To: tech-talk@aps.anl.gov <tech-talk@aps.anl.gov>, LONG FENG <feng98716@gmail.com>, Marco Filho <marco.filho@ess.eu>
Subject: Re: Protocol format issues in StreamDevice during COMBIVAC CM 52 device commissioning.

Wait, sorry, I misread the manual. The command that needs a comma is the write one.
The original command seems indeed correct...

---

From: Tech-talk <tech-talk-bounces@aps.anl.gov> on behalf of Marco Filho via Tech-talk <tech-talk@aps.anl.gov>
Sent: Wednesday, December 10, 2025 14:45
To: tech-talk@aps.anl.gov <tech-talk@aps.anl.gov>; LONG FENG <feng98716@gmail.com>
Subject: Re: Protocol format issues in StreamDevice during COMBIVAC CM 52 device commissioning.

 

out "RPV%(\$1:Channel)c?";

The manual says it should be in the format:
Reading command
S: Address Command <CR>
 E: [Parameter] <CR>

I think you are missing a comma?

I created an IOC with your db/test file combinations to test and my socket receives:

B'RPV3?\r' 

If I correctly understand the manual it should be:

B'RPV,3?\r' 

Is that right? If so,


out "RPV,%(\$1:Channel)c?";
Should fix the issue. Not sure though.


I really recommend connecting your IOC with some simple python socket server to see what it's actually sending:

import socket

HOST = '127.0.0.1' 

PORT = 5001

with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:

    s.bind((HOST, PORT))

    s.listen()

    conn, addr = s.accept()

    with conn:

        while True:

            data = "">

            print(data)

            if not data:

                break

            conn.sendall(data)

(...)
drvAsynIPPortConfigure("$(PORT)", "127.0.0.1:5001", 0, 0, 1)

That might make your life easier 🙂

Cheers,

Marco

---

From: Tech-talk <tech-talk-bounces@aps.anl.gov> on behalf of LONG FENG via Tech-talk <tech-talk@aps.anl.gov>
Sent: Wednesday, December 10, 2025 12:18
To: tech-talk@aps.anl.gov <tech-talk@aps.anl.gov>
Subject: Protocol format issues in StreamDevice during COMBIVAC CM 52 device commissioning.

 

Hi all，

In the communication protocol of the COMBIVAC CM 52, there is a specification as follows:

S: RPV[a]<CR>
E: b[,][TAB]x.xxxxE±xx

Here, a represents the channel number .1 = Channel 1 ,2 = Channel 2 ,3 = Channel 3 (The values 1, 2, and 3 are character digits).b represents the status.
I want to use StreamDevice to read data. The contents of my .db file are as follows:

record(mbbo, "$(P)$(R):Channel")

{
    field(DESC, "Select Channel")
    field(ZRVL, "49")
    field(ZRST, "Channel 1")
    field(ONVL, "50")
    field(ONST, "Channel 2")
    field(TWVL, "51")
    field(TWST, "Channel 3")
    field(VAL, "51")
    field(PINI, "YES")
    field(FLNK, "$(P)$(R):RPV")
}

record(ai, "$(P)$(R):RPV")
{
    field(DESC, "Reading pressure")
    field(DTYP, "stream")
    field(INP, "@test.proto readPressure($(P)$(R)) $(PORT)")
    field(SCAN, "1 second")
    field(FLNK, "$(P)$(R):Status")
}

record(mbbi, "$(P)$(R):Status")
{
    field(DESC, "status of channel")
    field(ZRVL, "0")
    field(ZRST, "OK")
    field(ONVL, "1")
    field(ONST, "BelowRange")
    field(TWVL, "2")
    field(TWST, "AboveRange")
    field(THVL, "3")
    field(THST, "ErrLo")
    field(FRVL, "4")
    field(FRST, "ErrHi")
    field(FVVL, "5")
    field(FVST, "SensorOff")
    field(SXVL, "6")
    field(SXST, "HVon")
    field(SVVL, "7")
    field(SVST, "SensorErr")
    field(EIVL, "9")
    field(EIST, "NoSensor")
    field(TEVL, "10")
    field(TEST, "NoTrig")
    field(TVVL, "12")
    field(TVST, "ErrPi")
    field(FFVL, "15")
    field(FFST, "OkDegas")
}

The contents of my .proto file are as follows：

OutTerminator = CR;

InTerminator = CR;

readPressure{
    out "RPV%(\$1:Channel)c?";
    in  "%(\$1:Status)d,\t%g";
}

readVersion{
    out "RVN";
    in  "%f";
}

 However, the following error occurs:
 

 2025/12/10 05:47:36.646640 Combivac1 Emission:fl:RPV: Input "?<09>P,<09>1" does not match format "%d"
2025/12/10 05:47:37.646725 Combivac1 Emission:fl:RPV: Input "?<09>P,<09>1" does not match format "%d"
2025/12/10 05:47:38.646532 Combivac1 Emission:fl:RPV: Input "?<09>P,<09>1" does not match format "%d"
2025/12/10 05:47:39.644943 Combivac1 Emission:fl:RPV: Input "?<09>P,<09>1" does not match format "%d"

What is the cause of this? Am I doing something wrong?Please help.
 

Feng