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;