Activating Kl6Xx1 Mode; Table 10 Control Word Structure - Beckhoff CX8180 Manual

Embedded pc with rs232/rs485

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6.4.6

Activating KL6xx1 mode

The KL6xx1 mode can be used for any serial protocols. Custom protocols or other open protocols can also

be used.

This mode behaves like other Beckhoff terminals with serial interface. It means that the programming and

the interface is similar to a serial interface. The Beckhoff supplement blocks (such as ModbusRTU,

COMLIB, ...) of the serial interface usually offer the 64-byte mode for the PC interface.

Requirements:

• The CX8180 Embedded-PC was selected as the target system.

Proceed as follows:

1. Click Device 2 (RS232) or Device 3 (RS485) in the tree view on the left.

2. Click the Communication Properties tab.

3. Click the option KL6xx1 Mode (Emulation) to use the CX8180 for all other protocols.

ð You have successfully activated the KL6xx1 mode. Follow the same steps to deactivate the KL6xx1

mode.

Programming

Alternatively, you can operate and program the interface yourself. The data structure consists of a control

and status word (2 bytes) and a data array. The control byte is written by the PLC program and

acknowledges the sending of data with the TR bit.

The data (bits 4 to 15) are transmitted when an edge change (toggle) is encountered. The RA bit

acknowledges that the receive data have been read. This enables the interface to recognize that it can copy

new data into the data array. The status word indicates how many data are valid. When a positive edge is

encountered, the IR bit (Reset) clears the buffers and resets the interface. The interface acknowledges the

command in the status word with the IA bit. Finally, the IR bit is set to "False" again.

Table 10: Control word structure.

Bit

15 14 13 12 11 10 09 08 07 06 05 04 03

Name Length of data to be written (OL bits)

CX8180

reserve IR bit

Version: 1.5

Configuration

RA bit

TR bit

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