User guide

5-10
Interbus Communications Module
The mapping in the scanner is set up in bytes. Inputs to the scanner
start at byte #512 and outputs start at byte #0.
PIDD/PODD parameter settings in the module determine the length
of I/O data mapped. In the example, each device is configured for 9
words (144 bits) of inputs and 9 words (144 bits) of outputs, the
maximum allowed for each device.
Using the PIDD/PODD values previously set in the RECOMM-IBUS
module, the I/O layout in the scanner is as shown in table 5.2.
Device 1.0’s SLC addressing is as follows:
Device 2.0’s SLC addressing starts immediately after 1.0
addressing (I:1.9 and O:1.9).
Table 5.2 – Scanner I/O Layout
Word
Inputs
(Data to Master)
Station Outputs
(Data from
Master)
Station
1.0 2.0 1.0 2.0
0 Logic Status 512 530 Logic Command 0 18
1 Feedback 514 532 Reference 2 20
2 Datalink A1 Out 516 534 Datalink A1 In 4 22
3 Datalink A2 Out 518 536 Datalink A2 In 6 24
4 Datalink B1 Out 520 538 Datalink B1 In 8 26
5 Datalink B2 Out 522 540 Datalink B2 In 10 28
6 Datalink C1 Out 524 542 Datalink C1 In 12 30
7 Datalink C2 Out 526 544 Datalink C2 In 14 32
8 Datalink D1 Out 528 546 Datalink D1 In 16 34
Table 5.3 – SLC Addressing for Device 1.0
Word
Inputs
(Data to
Master)
Assignment Outputs
(Data from
Master)
Assignment
Scanner SLC Scanner SLC
0 Logic Status 512 I:1.0 Logic
Command
0 O:1.0
1 Feedback 514 I:1.1 Reference 2 O:1.1
2 Datalink A1 Out 516 I:1.2 Datalink A1 In 4 O:1.2
3 Datalink A2 Out 518 I:1.3 Datalink A2 In 6 O:1.3
4 Datalink B1 Out 520 I:1.4 Datalink B1 In 8 O:1.4
5 Datalink B2 Out 522 I:1.5 Datalink B2 In 10 O:1.5
6 Datalink C1 Out 524 I:1.6 Datalink C1 In 12 O:1.6
7 Datalink C2 Out 526 I:1.7 Datalink C2 In 14 O:1.7
8 Datalink D1 Out 528 I:1.8 Datalink D1 In 16 O:1.8