BECKHOFF KL5121 - Manual (Page 16)

Annex
16 KL5121
Annex
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 KL5121 maps itself in the bus coupler depending on the set
parameters.
Mapping in the bus coupler
The KL5121 is mapped into the bus coupler depending on the set
parameters. The terminal always occupies memory space in the process
image of the inputs and outputs.
I/O Offset High Byte Low Byte
Complete evaluation = X 3
MOTOROLA format = 0 2 D1-1 D0-1
Word alignment = 0 1 CT/ST-0 D1-0
Default: CANCAL,
CANopen, RS232,
RS485, ControlNet,
DeviceNet
0 D0-0 CT/ST-0
I/O Offset High Byte Low Byte
Complete evaluation = X 3
MOTOROLA format = 1 2 D0-1 D1-1
Word alignment = 0 1 CT/ST-0 D0-0
Default: Interbus,
Profibus
0 D1-0 CT/ST-0
I/O Offset High Byte Low Byte
Complete evaluation = X 3 D1-1 D0-1
MOTOROLA format = 0 2 - CT/ST-0
Word alignment = 1 1 D1-0 D0-0
Default: Lightbus,
Bus Terminal Controller
(BCxxxx)
0 - CT/ST-0
I/O Offset High Byte Low Byte
Complete evaluation = X 3 D0-1 D1-1
MOTOROLA format = 1 2 - CT/ST-0
Word alignment = 1 1 D0-0 D1-0
0 - CT/ST-0
Legend Complete evaluation: the terminal is mapped with control / status byte.
Motorola format: The Motorola or Intel format can be set.
Word alignment: The terminal is at a word limit in the bus coupler.
CT: Control Byte (appears in the PI of the outputs).
ST: Status Byte (appears in the PI of the inputs).
D0 - 0 : D0 = Data-Low-Byte, 0 = Channel 0
D1 – 1 : D1 = Data-High-Byte, 1 = Channel 1