Functions
3.2 Option handling without reserve modules
Interface module IM151-1 STANDARD (6ES7151-1AA06-0AB0)
32 Manual, 07/2015, A5E01075950-AD
Control interface PIQ (AB x to AB x+7):
You must inform the IM151-1 via the control interface about which modules actually exist
and which slots have been left out. The IM151-1 cannot evaluate the configuration until it has
received this information.
Table 3- 5 Control interface
0
Content of the bitspur is not relevant
1 Bitspur is valid
1 to 63
Slot does not exist in the actual configuration
1 Slot exists in the actual configuration
Feedback interface PII (EB x to EB x+7):
The feedback interface (8 bytes) tells you which module is actually located on which slot.
Table 3- 6 Feedback interface
0
Option handling is inactive
1 Option handling is active
1 to 63 0 Slot belongs to an option that does not exist or the module sta-
If the feedback result of the feedback interface is identical with the specification of the control
interface, the configuration is correct.
In order to start testing the options, set Bit0=1 in the first byte (AB x).
Proceed as follows in order to ensure the consistency of the 8 bytes:
● Write the first byte (AB x) last (for direct access with T PAB)
or
● First write the complete information of the control interface in the first byte (AB x) with
Bit0=0 and then set Bit0=1 in this byte in the subsequent OB1 cycle.
Alternatively you can use the SFC15 in order to achieve consistent transfer.
Note
Whenever any change in the 8 bytes of the control inte
rface takes place, this information is
stored and used, even if non
-relevant bits were changed (bits outside the preset
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