PLCnext Useful Commands

A list of useful commands on PLCnext terminal

FW update (*.raucb file placed in /opt/plcnext)

sudo update-axcf2152

Check firmware version:

cat /etc/plcnext/arpversion

ot, to get only the basic info

cat /etc/plcnext/arpversion | grep -i Arpversion | awk '{print $2}'

Reboot

sudo reboot

Reset 1 - without deleting FW update

sudo recover-axcf2152 1      

Reset 2 - deleting FW update - factory default

sudo recover-axcf2152 2      

PLC start/stop/restart

sudo /etc/init.d/plcnext start

sudo /etc/init.d/plcnext stop

sudo /etc/init.d/plcnext restart

Check log file as stream:

tail -f -n 20 /opt/plcnext/logs/Output.log

where "-n 20" is the number of previous lines to show

Transfer C++ cross-compiled libraries .so

Move file in /usr/local/lib and then

cd /usr/local/lib
ln -sf _nomelibreria_.so
sudo ldconfig

IP Assignment

ifconfig eth0 192.168.1.x netmask 255.255.255.0

Gateway Assignment

route add default gateway 192.168.1.1

DNS Assignment

sudo echo "nameserver 8.8.8.8" > /etc/resolv.conf

DNS Check?

cat /etc/resolv.conf 

File search

find . -name tecmint.txt

Looks in the current directory and all sub-directories

With root you can search in every directory

Guix

guix package  --search=zabbix
guix install zabbix-agentd

Memory Check

top

Check Profinet Name

if you can log in to the PLC then you can take a look at the contents of this file:

nano /opt/plcnext/config/Io/PnS/PnS.local.config

Python

Check Python version

python3 --version

List all clients connected to server over 80 port

netstat -tn 2>/dev/null | grep -E '\s[0-9.]+:80\s' | awk '{print $5}' | cut -d : -f 1 | sort | uniq -c | sort -nr

Where:

command	description
netstat -tn 2>/dev/null	returns informations all tcp/tcp6 connections
grep -E '\s[0-9.]+:80\s'	filters rows that contains ip addres with 80 port using regular expressions
awk '{print $5}'	prints only column 5th that is described as "Foreign Address" that contains connected client ip address with his remote port
cut -d : -f 1	extracts only ip address for connected client
sort	sorts rows to let them to be counted with next command (uniq command)
uniq -c	counts (-c) neighbouring rows and print them as: number_of_rows row_text
sort -nr	makes numeric sort (-n) and reverse result (-r)

Ora attuale

date

Ora in UTC

date -u

Ora e la timezone (come testo e come variazione oraria)

date +"%Z %z"

Timezone configurata come zona geografica

cat /etc/timezone

---

For the following commands thanks to: https://github.com/plcnextusa/PLCnext-Guides/blob/master/Useful%20Linux%20Commands

Grant root access to an user:

usermod -aG sudo username

Give SSH rights to root:

  nano /etc/ssh/sshd_config   (remove comment # from the line which says permit root login yes)

Clear log file from Docker Container:

echo "" > $(docker inspect --format='{{.LogPath}}' <container_name_or_id>)

Return Firmware version of the PLCnext Controller via CLI

grep Arpversion /etc/plcnext/arpversion

Shows the product name from terminal

cat /etc/device_data/phoenixsign/production_data | grep 'DEVNAME=' | awk -F '\"' '{print $2}' | sed 's/\"//g'

Shows the mac address from the terminal

cat /sys/class/net/eth0/address

Shows the IP address from the terminal

ifconfig eth0 | awk '/inet addr/ {gsub("addr:", "", $2); print $2}'

Tells the current state of the SD card

./usr/sbin/sdcard_state.sh getStatus

Get the device the PLC boots off of (internal or external SD card)

./usr/sbin/sdcard_state.sh getBootDevice

Disable the SD card slot

./usr/sbin/sdcard_state.sh request_deactivation

Then reboot the PLC for the change to go into effect.

Enable the SD card slot

./usr/sbin/sdcard_state.sh request_activation

Then reboot the PLC for the change to go into effect.

Set the date and time to current

date -s "$(curl -s --head http://google.com | grep ^Date: | sed 's/Date: //g')"

Get the memory usage of the PLCnext (%)

free -m | awk 'NR==2{printf "%.2f\n",$3*100/$2 }’

Get the CPU usage of the PLCnext (%)

top -bn1 | grep "Cpu(s)" | sed "s/.*, *\([0-9.]*\)%* id.*/\1/" | awk '{print 100 - $1}'

Restart the PLCnext Runtime

(root user) /etc/init.d/plcnext restart
(admin user) sudo /etc/init.d/plcnext restart

Get the PLC's UUID

cat /etc/device_data/phoenixsign/cloud_uuid

Shows the product information in the terminal. Serial number, and all data on the hardware.

cat /etc/device_data/phoenixsign/production_data

Change the timezone of the PLCnext to local time zone

Viewing available timezones:

cd /usr/share/zoneinfo
ls

Re-Link the correct timezone:

sudo unlink /etc/localtime 
sudo ln -s /usr/share/zoneinfo/[ZONE NAME HERE] /etc/localtime