C# Class S7.Net.Plc

Sets the LastErrorCode to NoError and LastErrorString to String.Empty

Disonnects from the plc and close the socket

Releases all resources, disonnects from the plc and closes the socket

Open a socket and connects to the plc, sending all the corrected package and returning if the connection was successful (ErroreCode.NoError) of it was wrong.

Creates a PLC object with all the parameters needed for connections. For S7-1200 and S7-1500, the default is rack = 0 and slot = 0. You need slot > 0 if you are connecting to external ethernet card (CP). For S7-300 and S7-400 the default is rack = 0 and slot = 2.

Read and decode a certain number of bytes of the "VarType" provided. This can be used to read multiple consecutive variables of the same type (Word, DWord, Int, etc). If the read was not successful, check LastErrorCode or LastErrorString.

Reads a single variable from the plc, takes in input strings like "DB1.DBX0.0", "DB20.DBD200", "MB20", "T45", etc. If the read was not successful, check LastErrorCode or LastErrorString.

Reads a number of bytes from a DB starting from a specified index. This handles more than 200 bytes with multiple requests. If the read was not successful, check LastErrorCode or LastErrorString.

Reads all the bytes needed to fill a class in C#, starting from a certain address, and set all the properties values to the value that are read from the plc. This reads ony properties, it doesn't read private variable or public variable without {get;set;} specified.

Reads multiple vars in a single request. You have to create and pass a list of DataItems and you obtain in response the same list with the values. Values are stored in the property "Value" of the dataItem and are already converted. If you don't want the conversion, just create a dataItem of bytes. DataItems must not be more than 20 (protocol restriction) and bytes must not be more than 200 + 22 of header (protocol restriction).

Reads all the bytes needed to fill a struct in C#, starting from a certain address, and return an object that can be casted to the struct.

Takes in input an object and tries to parse it to an array of values. This can be used to write many data, all of the same type. You must specify the memory area type, memory are address, byte start address and bytes count. If the read was not successful, check LastErrorCode or LastErrorString.

Writes a single variable from the plc, takes in input strings like "DB1.DBX0.0", "DB20.DBD200", "MB20", "T45", etc. If the write was not successful, check LastErrorCode or LastErrorString.

Write a number of bytes from a DB starting from a specified index. This handles more than 200 bytes with multiple requests. If the write was not successful, check LastErrorCode or LastErrorString.

Writes a C# class to a DB in the plc

Writes a C# struct to a DB in the plc

Create the bytes-package to request data from the plc. You have to specify the memory type (dataType), the address of the memory, the address of the byte and the bytes count.

Given a S7 variable type (Bool, Word, DWord, etc.), it converts the bytes in the appropriate C# format.

Creates the header to read bytes from the plc

Given a S7 variable type (Bool, Word, DWord, etc.), it returns how many bytes to read.

Writes up to 200 bytes to the plc and returns NoError if successful. You must specify the memory area type, memory are address, byte start address and bytes count. If the write was not successful, check LastErrorCode or LastErrorString.