7 Data Exchange between PROFINET IO Controller and AS-i Slave
116
IE/AS−INTERFACE LINK PN IO as of hardware version 1, as of firmware version V2.0
Release 08/2018
C79000−G8976−C216−03
Access when you configure with STEP 7 (packed digital data)
If you selected the “Pack” function in the properties dialog of the AS-i line proxy in
STEP 7, the digital I/O data of all AS-i slaves will be transferred tightly packed in
the data field of the line proxy. The bit address of the AS-i bits is calculated and
displayed by STEP 7.
If a configured AS-i slave fails during runtime, this is signaled to the user program
as a remove module alarm via the diagnostic address assigned to the slave. When
accessing the digital bits of the AS-i slave, there is, however, no I/O error.
7.2.2 Special Feature of AS-i Analog Slaves
If you use slaves complying with CTT 1−5, the I/O bits may be used for special
transfer functions. For more detailed information, refer to the documentation of the
relevant AS-i slave.
The following applies to these protocol bits:
S In the input direction, the IE/AS-i LINK sets the value “0”.
S In the output direction, the IE/AS-i LINK ignores the bits.
How to access AS-i analog slaves is described in Section 7.3.
7.2.3 Special Features of AS-i Safety Slaves
IE/AS-i LINK sets the input bits at the safe input (F−IN1 or F−IN2):
S 0 and 1 = 0 if the contact at F−IN1 is open;
S 0 and 1 = 1 if the contact at F−IN1 is closed;
S 2 and 3 = 0 if the contact at F−IN2 is open;
S 2 and 3 = 1 if the contact at F−IN2 is closed;
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