BECKHOFF KL3132, KL3142, KL3152, KL3162, KL3172, KL3182: Access from the user program

Mapping

The Bus Terminals occupy addresses within the process image of the controller. The assignment of process data (input and output data) and parameterization data (control and status bytes) to the control addresses is called mapping. The type of mapping depends on:

• the fieldbus system used

• the terminal type

• the parameterization of the bus coupler (conditions) such as
  - compact or full evaluation
  - Intel or Motorola format
  - word alignment switched on or off

The Bus Couplers (BKxxxx, LCxxxx) and Bus Terminal Controllers (BCxxxx, BXxxxx) are supplied with certain default settings. The default setting can be changed with the KS2000 configuration software or with a master configuration software (e.g. TwinCAT System Manager or ComProfibus).

The following tables show the mapping depending on different conditions. For information about the contents of the individual bytes please refer to the pages Process image and Control and status byte.

Compact evaluation

For compact evaluation, the analog input terminals only occupy addresses in the input process image. Control and status bytes cannot be accessed.

Compact evaluation in Intel format

Default mapping for CANopen, CANCAL, DeviceNet, ControlNet, Modbus, RS232 and RS485 coupler

	Address	Input data		Output data
Conditions	Word offset	High byte	Low byte	High byte	Low byte
Complete evaluation: no Motorola format: no Word alignment: any	0	Ch1 D1	Ch1 D0	-	-
	1	Ch2 D1	Ch2 D0	-	-

Compact evaluation in Motorola format

Default mapping for PROFIBUS and Interbus coupler

	Address	Input data		Output data
Conditions	Word offset	High byte	Low byte	High byte	Low byte
Complete evaluation: no Motorola format: yes Word alignment: any	0	Ch1 D0	Ch1 D1	-	-
	1	Ch2 D0	Ch2 D1	-	-

Complete evaluation

For complete evaluation, the analog input terminals occupy addresses in the input and output process image. Control and status bytes can be accessed.

Complete evaluation in Intel format

	Address	Input data		Output data
Conditions	Word offset	High byte	Low byte	High byte	Low byte
Complete evaluation: yes Motorola format: no Word alignment: no	0	Ch1 D0	SB1	Ch1 D0	CB1
	1	SB2	Ch1 D1	CB2	Ch1 D1
	2	Ch2 D1	Ch2 D0	Ch2 D1	Ch2 D0

Complete evaluation in Motorola format

	Address	Input data		Output data
Conditions	Word offset	High byte	Low byte	High byte	Low byte
Complete evaluation: yes Motorola format: yes Word alignment: no	0	Ch1 D1	SB1	Ch1 D1	CB1
	1	SB2	Ch1 D0	CB2	Ch1 D0
	2	Ch2 D0	Ch2 D1	Ch2 D0	Ch2 D1

Complete evaluation in Intel format with word alignment

Default mapping for Lightbus, EtherCAT and Ethernet coupler and Bus Terminal Controller (BCxxxx, BXxxxx)

	Address	Input data		Output data
Conditions	Word offset	High byte	Low byte	High byte	Low byte
Complete evaluation: yes Motorola format: no Word alignment: yes	0	reserved	SB1	reserved	CB1
	1	Ch1 D1	Ch1 D0	Ch1 D1	Ch1 D0
	2	reserved	SB2	reserved	CB2
	3	Ch2 D1	Ch2 D0	Ch2 D1	Ch2 D0

Complete evaluation in Motorola format with word alignment

	Address	Input data		Output data
Conditions	Word offset	High byte	Low byte	High byte	Low byte
Complete evaluation: yes Motorola format: yes Word alignment: yes	0	reserved	SB1	reserved	CB0
	1	Ch1 D0	Ch1 D1	Ch1 D0	Ch1 D1
	2	reserved	SB2	reserved	CB1
	3	Ch2 D0	Ch2 D1	Ch2 D0	Ch2 D1

Key

Complete evaluation: In addition to the process data, the control and status bytes are also mapped in the address space.
Motorola format: Motorola or Intel format can be set.
Word alignment: In order for the channel address range to commence at a word boundary, empty bytes are inserted into the process image as appropriate.

SB n: status byte for channel n (appears in the input process image).
CB n: control byte for channel n (appears in the output process image).

Ch n D0: channel n, lower-value data byte
Ch n D1: channel n, higher-value data byte

reserved: This byte occupies process data memory, although it has no function.
"-": This byte is not assigned or used by the terminal/module.