BECKHOFF KL2502 - Manual (Page 18)

Terminal configuration
16 KL2502, KL2512
3.4 Mapping in the bus coupler
As already described in the chapter terminal configuration, each bus
terminal is mapped in the bus coupler. In the standard case, this mapping
is done with the default setting in the bus coupler / bus terminal. This
default setting can be modified with the Beckhoff KS2000 configuration
software or using master configuration software (e.g. ComProfibus or
TwinCAT System Manager). The following tables provide information on
how the KL2502 maps itself in the bus coupler depending on the set
parameters.
Mapping in the bus coupler The KL2502 is mapped in the bus coupler with 6 bytes input and 6 bytes
output data.
Conditions
Word offset High byte Low byte
Complete evaluation: any 0 Ch1 D0 Ch1 CB/SB
Motorola format: no 1 Ch2 CB/SB Ch1 D1
Word alignment: no 2 Ch2 D1 Ch2 D0
Default mapping for
CANopen, CANCAL,
DeviceNet, ControlNet,
Modbus, RS232 und
RS485 Couplers
3 - -
Conditions
Word offset High byte Low byte
Complete evaluation: any 0 Ch1 D1 Ch1 CB/SB
Motorola format: yes 1 Ch2 CB/SB Ch1 D0
Word alignment: no 2 Ch2 D0 Ch2 D1
Default mapping for
Profibus and Interbus
Couplers
3 - -
Conditions
Word offset High byte Low byte
Complete evaluation: any 0 res. Ch1 CB/SB
Motorola format: no 1 Ch1 D1 Ch1 D0
Word alignment: yes 2 res. Ch2 CB/SB
Default mapping for
Lightbus, EtherCAT and
Ethernet Couplers and Bus
Terminal Controllers
(BCxxxx, BXxxxx)
3 Ch2 D1 Ch2 D0
Conditions
Word offset High byte Low byte
Complete evaluation: any 0 res. Ch1 CB/SB
Motorola format: yes 1 Ch1 D0 Ch1 D1
Word alignment: yes 2 res. Ch2 CB/SB
3 Ch2 D0 Ch2 D1
Key Complete evaluation:
The terminal is mapped with control and status byte.
Motorola format:
Motorola or Intel format can be set.
Word alignment:
The terminal is at word limit in the Bus Coupler.
Ch n SB: status byte for channel n (appears in the input process image).
Ch n CB: control byte for channel n (appears in the output process image).
Ch n D0: channel n, data byte 0 (byte with the lowest value)
Ch n D1: channel n, data byte 1 (byte with the highest value)
"-": This byte is not used or occupied by the terminal.
res.: reserved:
This byte occupies process data memory, although it is not used.