IFM Electronic AC402S, Programming Manual

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SmartPLC SafeLine AC4S with fieldbus interfaces
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7.3.2 Validity of the interface data
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In order to facilitate the access to inputs and outputs of AS-i slaves, AC4S projects offer clearly
defined interfaces in the device tree (
→
Overview: Project structure with AC4S (
→ S.
17 )).
Depending on the active instance for accessing the outputs of the AS-i slaves (Manual, Gateway,
PLC), the CODESYS data mapper only updates certain address areas of the interfaces. The following
table shows which address areas of the i/o interfaces provide valid data values while in a certain
operating mode:
Output control I/O interfaces Updated address areas / channels
Manual [ASi_Master_1] AS-i 1 Input (%IB, %IW)
[ASi_Master_2]* AS-i 2 Input (%IB, %IW)
[Fieldbus_Interface]

AS-i 1 Output (%IB, %IW)

AS-i 2 Output (%IB, %IW)
Gateway [ASi_Master_1] ASi 1 Input (%IB, %IW)
[ASi_Master_2]* AS-i 2 Input (%IB, %IW)
[Fieldbus_Interface]

AS-i 1 Output (%IB, %IW)

AS-i 2 Output (%IB, %IW)
PLC [ASi_Master_1]

AS-i 1 Input (%IB, %IW)

AS-i 1 Output (%QB, %QW)
[ASi_Master_2]*

AS-i 2 Input (%IB, %IW)

AS-i 2 Output (%QB, %QW)
[Fieldbus_Interface]

AS-i 1 Output (%IB, %IW)

AS-i 2 Output (%IB, %IW)
* ... only available for devices with 2 AS-i masters
► When linking variables with inputs and outputs, only use interfaces in the project tree, that
are updated by the CODESYS data mapper!