The DF1 Serial driver implements communication with Rockwell Allen-Bradley devices using the DF1 Protocol (SLC Families and Micrologix) via Serial communication. It operates as a Master on serial networks. The communications blocks are dynamically created according to the pooling cycle defined on the Access Type for each Device Point. 

Summary Information

Communication Driver Name: DF1 Serial

Current Version: 1.0

Implementation DLL: T.ProtocolDriver.DF1_Serial

Protocol: DF1

Interface: Serial 

Max number of nodes: User defined

Supported Files:


FilesRead WriteData TypeAddress Size
NYesYesWord2 bytes
BYesYesBit1 bit
FYesYesSingle4 bytes
OYesYesOutput1 bit
IYesYesInput1 bit


Channel Configuration

Protocol Options

CheckSum: It defines the checksum currently being used by the device, whether it’s CRC or BCC.

Settings

Set the fields according to your serial port configuration.


Node Configuration

Station Configuration

SlaveId: Set this field with the address of the slave device in the network. 


Point Address Configuration

The syntax for the DF1 Serial communication point is: <Files>:<Address>/Parameter

Where:

<Operand> indicates the memory area. The valid values are: 

    • N, for Integer
    • B, for digital
    • F, for real
    • O, for digital (output)
    • I, for digital (input) 

The operand also has a register value, except by I/O. 

<Address> indicates the data address for the chosen file

<Parameter> indicates the specific bit of that address (which is a byte) (for the digital values)

E.g.:

    • F8:0
    • N21:1
    • B21:1/6
    • I:0/0


Troubleshoot

The status of the driver execution can be observed through the diagnostic tools, which are:

• Trace window
• Property Watch
• Module Information


The above tools indicate if the operations have succeeded or have failed. A status of 0 (zero) means communication is successful. Negative values indicate internal driver errors, and positive values indicate protocol error codes.


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