that additional ENDIF statements are included
or the correct number of ENDIF statements is not present.
Unlike the Simatic® 555. there are no restrictions regarding the instructions that
can be used in a compiled program.
User Configuration
The following differences in the user configuration should be noted:
1. Allocation of CS memory is not supported. The CTI 2500 controller uses high speed DRAM to store and execute
compiled SF programs and subroutines. Consequently, CS memory is not required.
2. User allocation of User Subroutine memory is not supported. The CTI 2500 controller does not support user
subroutines (XSUB). See XSUB description above.
3. A time slice for Report by Exception (RBE) is not supported. Some alternative solutions exist. Please consult us with
your exact configuration.
4. A new time slice, Network Communications, has been added to support the local Ethernet port.
I/O Support
The following are not presently supported. This is subject to change.
• Interrupt I/O
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