BECKHOFF KL1512 - Manual (Page 14)

Appendix
12 KL1512
4 Appendix
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 KS2000 configuration software or
using master configuration software (e.g. ComProfibus or TwinCAT System
Manager). The following tables provide information on how the KL1512
maps itself in the bus coupler depending on the set parameters.
4.1 Mapping in the bus coupler
The KL1512 is mapped in the bus coupler with 5 bytes input and 5 bytes
output data.
Conditions
Word offset High Byte Low Byte
0 Ch1 D0 Ch1 CB/SB
1 Ch2 CB/SB Ch1 D1
Default Mapping for CAN,
DeviceNet, ControlNet,
Modbus, RS232 and
RS485 Coupler
Complete evaluation: don’t care
Motorola format:
no
Word alignment: no 2 Ch2 D1 Ch2 D0
Conditions
Word offset High Byte Low Byte
0 Ch1 D1 Ch1 CB/SB
1 Ch2 CB/SB Ch1 D0
Default-Mapping for
Profibus and Interbus
Coupler
Complete evaluation: don’t care
Motorola format:
yes
Word alignment: no 2 Ch2 D0 Ch2 D1
Conditions
Word offset High Byte Low Byte
0 res. Ch1 CB/SB
1 Ch1 D1 Ch1 D0
2 res. Ch2 CB/SB
Default-Mapping for
Lightbus and Ethernet
Coupler and
Bus Terminal Controller
(BCxxxx, BXxxxx)
Complete evaluation: don’t care
Motorola format:
no
Word alignment: yes
3 Ch2 D1 Ch2 D0
Conditions
Word offset High Byte Low Byte
0 res. Ch1 CB/SB
1 Ch1 D0 Ch1 D1
Complete evaluation: don’t care
Motorola format:
yes
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)
res.: reserved:
This byte occupies process data memory, although it is not used.