Local process image in delivery state

The process image of the Bus Terminal Controller consists of input, output and flag areas. In addition, there are unallocated data without fixed address. They are created without specifying an address. 256 kB of memory space is reserved on the Bus Terminal Controller for this type of variable. For the allocated data 2048 bytes of input data and 2048 bytes of output data are available. In the default configuration, i.e. in delivery state of the Bus Terminal Controller, all connected Bus Terminals are assigned a fixed address. The data for the CANopen communication are stored from address offset 1000dec. In the default configuration the number of CANopen data is 4 x kbyte (4 PDOs).

INPUTS

OUTPUTS

Bus Terminal %IB0 ...

Bus Terminal %QB0 ...

CANopen data (PLC variables) %IB1000 ...

CANopen data (PLC variables) %QB1000 ...

... %IB2047 maximum

... %QB2047 maximum

CANopen data

PDO number

Read/Write

BX process image

PDO 1

Rx/Tx

%IB1000...%IB1007/QB1000...%QB1007

PDO 2

Rx/Tx

%IB1008...%IB1015/QB1008...%QB1015

PDO 3

Rx/Tx

%IB1016...%IB1023/QB1016...%QB1023

PDO 4

Rx/Tx

%IB1024...%IB1031/QB1024...%QB1031

Further PDO data (5-32) have to be enabled by the master (see CAN configuration).

Addressing of the connected Bus Terminals

The default setting is for all the connected Bus Terminals to be assigned to the local process image. Mapping in the Bus Terminal Controller is based on the following rule:
first all complex Bus Terminals, in the order they are connected, then the digital Bus Terminals, which are made up to a byte. The default mapping of the complex Bus Terminals is:

Example

Bus Terminal Controller: 1 x BX5100
Position 1: 1 x KL1012
Position 2: 1 x KL1104
Position 3: 1 x KL2012
Position 4: 1 x KL2034
Position 5: 1 x KL1502
Position 6: 1 x KL3002
Position 7: 1 x KL4002
Position 8: 1 x KL6001
Position 9: 1 x KL9010

Process image

Bus Terminal

Position

Input image

Output image

KL1501

5

%IB0...%IB5

%QB0...%QB5

KL3002

6

%IB6...%IB13

%QB6...%QB13

KL4002

7

%IB14...%IB21

%QB14...%QB21

KL6001

8

%IB22...%IB29

%QB22...%QB29

KL1012

1

%IX30.0..30.1

-

KL1104

2

%IX30.1..30.5

-

KL2012

3

-

%QX30.0..30.1

KL2034

4

-

%QX30.2..30.5

KL9010

9

-

-

Local process image in delivery state 1:

Address of the Bus Terminals at the local PLC

If you do not know the address of the Bus Terminals that you have assigned to the local PLC (BCxx00):

Perform your hardware configuration in the System Manager. After you have entered all the Bus Terminals and PLC variables, click with the right mouse button on the BCxx00 in the hardware tree, and select the menu item Export variables information.... A file is saved, and this file can be inserted in the System Manager under Project - Import. Now you will have the entry TwinCAT import under the global variables, and you will find here all the variables that you have assigned to the local PLC (BCxx00).