ASCII Generic ASCII Master Protocol

Summary

ASCII driver implements communication with any device using ASCII protocol on TCP/IP or serial networks. The communications blocks are dynamically created according the pooling cycle defined on the AccessType for each Device Point.

Channels Configuration

Protocol Options

BlockSize: Defines the maximum amount of characters, the default value is 250.

StartChar:  Defines the start character  of coming message.

EndChar:  Defines the end character  of coming message.

Settings

Serial and MultiSerial channels:

Default configuration:

• BaudRate: 9600
• DataBits: 8
• StopBits: 1
• Parity: None

TCP/IP channels:

NodeConnections: Defines the maximum number of parallel requests that will be sent to each node (asynchronous communication)

Nodes Configuration

Station Configuration

Serial channels:

• Nothing

TCP/IP channels:

• Station syntax: <IP address> ; <Port number>

Where :

• <IP address> = IP address of the slave device in the ASCII network
• <Port number> = TCP port where the slave device is listening (default is 502)

E.g.:  192.168.1.101 ; 502

Points Configuration

The syntax for the ASCII communication points is: <SequenceId>:<SizeOf>

Where:

• <SequenceId> indicates the data order where the TX message will be created:
• <SizeOf> indicates the characters amout from the configured tag

Access Point

Read and Write commands will generate the same TX message.

Example

• Point 1

TagName: TagA (value equal ABCD)

Address: 0:3

• Point 2

TagName: TagB (value equal 1234)

Address: 2:3

• Point 3

TagName: TagC (value equal abcd)

Address: 1:4

The TX message created is: ABCabcd123

Driver Revision History

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