TL62x-EVM的OpenPLC实践（一）

参照之前的博客登录TL62x-EVM的openplc runtime的网络服务器，并参照runtime的使用说明进行初步测试。

1 OpenPLC的初步测试

上传plc程序，查看是否能正常运行。

出现编译错误：

有关源码如下：

#compiling the ST file into C

cd ..

echo "Optimizing ST program..."

./st_optimizer ./st_files/"$1" ./st_files/"$1"

echo "Generating C files..."

./iec2c -f -l -p -r -R -a ./st_files/"$1"

if [ $? -ne 0 ]; then

echo "Error generating C files"

echo "Compilation finished with errors!"

exit 1

# stick reference to ethercat_src in there for CoE access etc functionality that needs to be accessed from PLC

if [ "$ETHERCAT_OPT" = "ethercat" ]; then

sed -i '7s/^/#include "ethercat_src.h" /' Res0.c

echo "Moving Files..."

mv -f POUS.c POUS.h LOCATED_VARIABLES.h VARIABLES.csv Config0.c Config0.h Res0.c ./core/

if [ $? -ne 0 ]; then

echo "Error moving files"

echo "Compilation finished with errors!"

exit 1

在网上找到了有关的帖子：

https://openplc.discussion.community/post/openplc-on-ubunto-20-04-10800100

原帖的帖主遇到的问题和我类似，具体如下：

　　帖主在Ubuntu 20.04上安装了OpenPLC_v3，在编译程序时也会遇到错误停止，输出的日志和我一样：

　　……　

　　VARIABLES.csv Config0.c Config0.h Res0.c ./core/
　　mv: cannot stat 'Config0.c': No such file or directory
　　mv: cannot stat 'Config0.h': No such file or directory
　　mv: cannot stat 'Res0.c': No such file or directory
　　遇到的问题应该也和我一样：没有成功生成Config0.c、Config0.h 和 Res0.c 。

原帖中有回复认为遇到的问题是：编写的PLC 程序缺少正确格式的resource或configuration。具体来说，是因为program中需要有一个名为 Res0 的resource和一个名为 Config0 的configuration。没有它们，程序将无法运行，而OpenPLC 编辑器会自动创建这些资源。

看起来像是原来.st文件的问题，于是我将以前利用OpenPLC editor编写的程序hello.st上传编译进行尝试（具体参见这篇博客），发现可以成功编译，如下图：

注意，还需要选择有关的硬件层，如下：

选择Save changes后，即会重新编译程序，

选择Go to Dashboard，即可start PLC

出现以下错误：

OpenPLC Runtime starting...
Interactive Server: Listening on port 43628
PSM: Starting PSM...
Traceback (most recent call last):
File "./core/psm/main.py", line 27, in <module>
import psm
File "/OpenPLC_v3/OpenPLC_v3-master/webserver/core/psm/psm.py", line 3, in <module>
from pymodbus.server.sync import ModbusTcpServer
ModuleNotFoundError: No module named 'pymodbus'
PSM: Error while starting Python interpreter
Issued start_modbus() command to start on port: 502
Server: Listening on port 502
Server: waiting for new client...
Issued start_dnp3() command to start on port: 20000
DNP3 ID manager: Starting thread (0)
DNP3 ID DNP3_Server: Listening on: 0.0.0.0:20000
Issued start_enip() command to start on port: 44818
Server: Listening on port 44818
Server: waiting for new client...
Issued stop_pstorage() command
PSM: Connection to psm failed
PSM: Error connecting to psm!
PSM: PSM is disabled
Skipping configuration of Slave Devices (mbconfig.cfg file not found)
Warning: Persistent Storage file not found

这个错误可能是由于缺少pymodbus模块导致的，本想直接安装pymodbus，但发现连pip都没有，如下：

但发现已经安装了python，如下：

所以需要安装pip以及pymodbus。但在安装pip时，输入以下命令，遇到了相应问题：

sudo apt update

sudo apt install python3-pip

所以需要首先安装依赖apt-utils，运行如下指令：

sudo apt install apt-utils

然后再安装pip：sudo apt install python3-pip，会显示安装成功。

最后安装pymodbus，如下：

在start PLC时，又出现如下问题：

OpenPLC Runtime starting...
Interactive Server: Listening on port 43628
PSM: Starting PSM...
Traceback (most recent call last):
File "./core/psm/main.py", line 27, in <module>
import psm
File "/OpenPLC_v3/OpenPLC_v3-master/webserver/core/psm/psm.py", line 3, in <module>
from pymodbus.server.sync import ModbusTcpServer
ModuleNotFoundError: No module named 'pymodbus.server.sync'
PSM: Error while starting Python interpreter
Issued start_modbus() command to start on port: 502
Server: Listening on port 502
Server: waiting for new client...
Issued start_dnp3() command to start on port: 20000
DNP3 ID manager: Starting thread (0)
DNP3 ID DNP3_Server: Listening on: 0.0.0.0:20000
Issued start_enip() command to start on port: 44818
Server: Listening on port 44818
Server: waiting for new client...
Issued stop_pstorage() command
PSM: Connection to psm failed
PSM: Error connecting to psm!
PSM: PSM is disabled
Skipping configuration of Slave Devices (mbconfig.cfg file not found)
Warning: Persistent Storage file not found