How to automatically run a .net core program in PLC on startup or boot

PLCnext Technology & PLCnext Controls
1

Could you post a sample scripts on how to run a .net core program on startup? or could you provide the step by step procedure? I was able to run a .net core program on it by installing the .net runtime but what I need now is to run the program every bootup or startup of the PLC automatically. I have tried some solutions in google but nothing work like: - Creating sh file in /etc/init.d/ or /etc/rc5.d. -Creating cronjob My sh file contain: #!/bin/bash cd /opt/plcnext/pondus-services/PondusBaseStationV2/ dotnet PondusBaseStation.dll but nothing works for me.

2

Hello,

If you want to create Init.d scripts there is a lot you have to keep in mind.

This is about general linux or Init.d services so I suggest you look up a “update.rc” or “Init.d” Tutorial on the web.
I guess your script right now will block the rest of your boot up sequence as you do not spawn a seperate process for your dotnet executable.

At the very least add a “&” after your “dotnet some.dll &” comand.

Small example how such a script could look with start-stop-daemon ...

```bash
#! /bin/sh
### BEGIN INIT INFO
# Provides:          socat
# Required-Start:    $local_fs $time $network
# Required-Stop:     $local_fs $time $network
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Daemon to setup Socat connection to GWd
#
# Description: The Socat init script will start/stop Socat as specified in /etc/default/socat/socat.conf
#              Logs can be found at /var/log/socat.log
### END INIT INFO
NAME=socat
DAEMON=/usr/bin/socat ## /usr/bin/dotnet some.dll
SOCAT_DEFAULTS='-d -d -d -lf /var/log/socat.log'# Some parameters how to run your dll maybe debug? where to store logs?
. /etc/default/socat/socat.conf # load some args to run with your dll
PATH=/bin:/usr/bin:/sbin:/usr/sbin
[ -x $DAEMON ] || exit 0
start_socat() {
        start-stop-daemon --oknodo --quiet --start \\
                --pidfile /var/run/socat.pid \\
                --background --make-pidfile \\
                --exec $DAEMON -- $SOCAT_DEFAULTS $OPTIONS < /dev/null
        do_wait_tty
        chown admin:plcnext_firmware $TTYNAME
        init_tty
}
3

Hi Oliver, Thanks for the reply. I have added & on the end if my script and create it on **/etc/init.d/

**
program runs ok when I execute this : /etc/init.d/pbss start
but still it doesn’t execute in startup.

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4

Hey,

try
“dotnet some.dll &> /var/log/dotnetPbss.log &”
Then you will at least know whats going on with the dotnet.
You can also add additional echos to your script to see where it might fail.
And have a look at “/var/log/*” for details what is going on at your system startup.

Did you execute
“update-rc.d [-n] [-r ] [-s] start|stop NN runlvl [runlvl] […] . update-rc.d [-n] [-r ] [-s] start|stop NN runlvl [runlvl] […] .” to register the init.d script?

kind regards,
Oliver

5

Hi Oliver, Thanks, It works now. The key is the logging you have taught, I was able to see why my program is not running. There are also some configs that I adjust on my program for it to work but now I can confirm that it was executing on startup. Many Thanks!