5 mapping in the bus coupler – BECKHOFF KL5111-0000 User Manual
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Register description
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KL5111-0000
3.5 Mapping in the bus coupler
As already described in the Terminal Configuration section, each Bus Terminal is mapped in the Bus
Coupler. In the delivery state, this mapping occurs with the default settings of the Bus Coupler for this
terminal. 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 KL5111 occupies memory space in the input and output process image. The following tables provide
information about the KL5111’s mapping, depending on the conditions set in the Bus Coupler.
Default mapping for
CANopen, CANCAL, DeviceNet, ControlNet, Modbus, RS232 und RS485 Couplers
Conditions
Word Offset
High byte
Low byte
Complete evaluation:
any
0 D0
CB/SB
Motorola format:
no
1 D2 D1
Word alignment:
no
2 D4 D3
Default mapping for Profibus and Interbus Couplers
Conditions
Word offset
High byte
Low byte
Complete evaluation:
any
0 D1
CB/SB
Motorola format:
yes
1 D2 D0
Word alignment:
no
2 D3 D4
Default mapping for
EtherCAT, Lightbus and Ethernet Couplers and Bus Terminal Controllers (BCxxxx, BXxxxx)
Conditions
Word offset
High byte
Low byte
Complete evaluation:
any
0 -
CB/SB
Motorola format:
no
1 D1 D0
Word alignment:
yes
2 - D2
3 D4 D3
Conditions
Word offset
High byte
Low byte
Complete evaluation:
any
0 -
CB/SB
Motorola format:
yes
1 D0 D1
Word alignment:
yes
2 - D2
3 D3 D4
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.
CB: Control Byte (appears in the output process image)
SB: Status Byte (appears in the input process image)
D0: byte of the Counter Word with the lowest value (read /set)
D1: byte of the Counter Word with the highest value (read /set)
D2: together with D3/D4 this byte contains the cycle duration
D3: byte of the Latch Word with the lowest value (read)
D4: byte of the Latch Word with the highest value (read)