You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
49 lines
1.3 KiB
49 lines
1.3 KiB
# phpmodbus
|
|
|
|
Implementation of the basic functionality of the Modbus TCP and UDP based protocol using PHP.
|
|
|
|
This is a fork of the original project at https://code.google.com/p/phpmodbus/
|
|
|
|
> **What's new**
|
|
>
|
|
> This fork adds a namespace and fixes issues encountered when porting to PHP 7
|
|
|
|
**WARNING: Everything except the actual code in this repo may be broken and outdated.**
|
|
|
|
Implemented features:
|
|
* Modbus master
|
|
* FC1 - Read coils
|
|
* FC2 - Read input discretes
|
|
* FC3 - Read holding registers
|
|
* FC4 - Read holding input registers
|
|
* FC5 - Write single coil
|
|
* FC6 - Write single register
|
|
* FC15 - Write multiple coils
|
|
* FC16 - Write multiple registers
|
|
* FC23 - Read/Write multiple registers
|
|
|
|
Example:
|
|
|
|
```php
|
|
require_once dirname(__FILE__) . '/Phpmodbus/ModbusMaster.php';
|
|
|
|
// Modbus master UDP
|
|
$modbus = new ModbusMaster("192.168.1.1", "UDP");
|
|
// Read multiple registers
|
|
try {
|
|
$recData = $modbus->readMultipleRegisters(0, 12288, 5);
|
|
}
|
|
catch (Exception $e) {
|
|
// Print error information if any
|
|
echo $modbus;
|
|
echo $e;
|
|
exit;
|
|
}
|
|
// Print data in string format
|
|
echo PhpType::bytes2string($recData);
|
|
```
|
|
|
|
For more see [http://code.google.com/p/phpmodbus/downloads/list documentation] or [http://code.google.com/p/phpmodbus/wiki/FAQ FAQ].
|
|
|
|
Note:
|
|
* The PHP extension php_sockets.dll should be enabled (server php.ini file)
|
|
|