Beckhoff KL1501 User Manual download pdf (Page 10)

Terminal configuration

8 KL1501

This structure is broken down into the following areas:

0 to 7

Process variables

8 to 15

Type register

16 to 30

Manufacturer parameters

31 to 47

User parameters

48 to 63

Extended user area

Process variables

R0 to R7: Registers in the terminal’s internal RAM

The process variables can be used in additional to the actual process

image and their functions are specific to the terminal.

R0 to R5: Terminal specific registers

The function of these registers depends on the respective terminal type

(see terminal-specific register description).

R6: Diagnostic register

The diagnostic register may contain additional diagnostic information. In

the case of serial interface terminals, for example, parity errors that have

occurred during data transfer are indicated.

R7: Command register

High-Byte_Write = function parameter

Low-Byte_Write = function number

High-Byte_Read = function result

Low-Byte_Read = function number

Type registers

R8 to R15: Registers in the terminal’s internal ROM

The type and system parameters are programmed permanently by the

manufacturer and can only be read by the user but cannot be modified.

R8: Terminal type:

The terminal type in register R8 is needed to identify the terminal.

R9: Firmware version X.y

The firmware version can be read as an ASCII character string.

3.2.1.1 R10: Data length

R10 contains the number of multiplexed shift registers and their length in

bits.

The bus coupler sees this structure.

R11: Signal channels

In comparison with R10, the number of logically existing channels is

located here. For example, one physically existing shift register may

consist of several signal channels.

R12: Minimum data length

The respective byte contains the minimum data length of a channel to be

transferred. If the MSB is set, then the control/status byte is not necessarily

needed for the function of the terminal and, with appropriate configuration

of the coupler, is not transferred to the control system.

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Beckhoff KL1501 User Manual Page 10

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