Illegal data address problem

[pietrach]

I use Modbus master slave simulator

Code receive an error:

Packet to be sent (in hex): 8b7f00000006000400d60001
Binary received (in hex): 8b7f00000003008402
ModbusTcpClient\Exception\ModbusException Object ( [message:protected] => Illegal data address [string:Exception:private] => [code:protected] => 2 [file:protected] => D:\wamp\www\modbus\vendor\aldas\modbus-tcp-client\src\Packet\ResponseFactory.php [line:protected] => 85 [trace:Exception:private] => Array ( [0] => Array ( [file] => D:\wamp\www\modbus\test.php [line] => 28 [function] => parseResponseOrThrow [class] => ModbusTcpClient\Packet\ResponseFactory [type] => :: [args] => Array ( [0] => �� ) ) ) [previous:Exception:private] => [xdebug_message] => ( ! ) ModbusTcpClient\Exception\ModbusException: Illegal data address in D:\wamp\www\modbus\vendor\aldas\modbus-tcp-client\src\Packet\ResponseFactory.php on line 85 Call Stack #TimeMemoryFunctionLocation 10.0001401160{main}( )...\test.php:0 20.0392439400ModbusTcpClient\Packet\ResponseFactory::parseResponseOrThrow( )...\test.php:28 ) Illegal data address
#0 D:\wamp\www\modbus\test.php(28): ModbusTcpClient\Packet\ResponseFactory::parseResponseOrThrow('\x8B\x7F\x00\x00\x00\x03\x00\x84\x02') #1 {main}

[aldas]

@pietrach is that test program set to emulate 'unit id'/'slave id' = 1 scenario? If so then you need to create packet as

$unitId = 1;
$packet = new ReadInputRegistersRequest($startAddress, $quantity, $unitId);

default unit/slave/device id value is 0

[pietrach]

@aldas result the same

Packet to be sent (in hex): 07b300000006010400d60001
Binary received (in hex): 07b300000003018402
ModbusTcpClient\Exception\ModbusException Object ( [message:protected] => Illegal data address [string:Exception:private] => [code:protected] => 2 [file:protected] => D:\wamp\www\modbus\vendor\aldas\modbus-tcp-client\src\Packet\ResponseFactory.php [line:protected] => 85 [trace:Exception:private] => Array ( [0] => Array ( [file] => D:\wamp\www\modbus\test.php [line] => 28 [function] => parseResponseOrThrow [class] => ModbusTcpClient\Packet\ResponseFactory [type] => :: [args] => Array ( [0] => �
� ) ) ) [previous:Exception:private] => [xdebug_message] => ( ! ) ModbusTcpClient\Exception\ModbusException: Illegal data address in D:\wamp\www\modbus\vendor\aldas\modbus-tcp-client\src\Packet\ResponseFactory.php on line 85 Call Stack #TimeMemoryFunctionLocation 10.0002401160{main}( )...\test.php:0 20.0332439400ModbusTcpClient\Packet\ResponseFactory::parseResponseOrThrow( )...\test.php:28 ) Illegal data address
#0 D:\wamp\www\modbus\test.php(28): ModbusTcpClient\Packet\ResponseFactory::parseResponseOrThrow('\x07\xB3\x00\x00\x00\x03\x01\x84\x02') #1 {main}

[pietrach]

It's working:

Packet to be sent (in hex): b41600000006010400d50001
Binary received (in hex): b41600000005010402003a
Parsed packet (in hex): b41600000005010402003a
Data parsed from packet (bytes):
Array ( [0] => 0 [1] => 58 ) Array ( [0] => 0 [1] => 58 ) Array ( [0] => 0 [1] => 58 ) 

[aldas]

very good. I think it has to do how modbus slave program addressing is set

see:

[pietrach]

But I don't understand:

Result is:

Packet to be sent (in hex): f35100000006010400d50001
Binary received (in hex): f351000000050104021104
Parsed packet (in hex): f351000000050104021104
Data parsed from packet (bytes):
Array ( [0] => 17 [1] => 4 )
Array ( [0] => 17 [1] => 4 )
Array ( [0] => 17 [1] => 4 ) 

Why ?

[pietrach]

Ok, It's working

 $responseWithStartAddress = $response->withStartAddress($startAddress);
 print_r($responseWithStartAddress->getWordAt($startAddress)->getInt16());

return 4356

[aldas]

Nice. You got everything working @pietrach? Can I close this ticket?

[pietrach]

I think so but it isn't known what else will happen during :-)