Functions
3.2 Option handling without RESERVE modules
IM151-1 FO STANDARD interface module (6ES7151-1AB05-0AB0)
28
Manual, 02/2010, A5E01075965-03
Control interface PIQ (AB x to AB x+7):
Use the control interface to provide information for the IM151-1 FO STANDARD which
modules actually have been installed and which slots have been left empty. The IM151-1
cannot evaluate the configuration until it has received this information.
Table 3- 5
Control interface
Slot
Value of the bit
Reaction
0
Content of the bitspur is not relevant
0
1
Bitspur is valid
0
Slot does not exist in the actual configuration
1 to 63
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
Slot
Value of the bit
Reaction
0
Option handling is inactive
0
1
Option handling is active
0
Slot belongs to an option that does not exist or the module
status is not OK
1 to 63
1
Slot exists and is OK
If the feedback result of the feedback interface is identical with the specification of the control
interface, the configuration is correct.
Procedure
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 interface takes place, this information is
stored and used, even if non-relevant bits were changed (bits outside the preset
configuration).
