S5-115F Manual STEP 5 Operations
3.3.4 Other Operations
Table 3-29 provides an overview of further system operations.
Table 3-29. The ”TAK” and ”STS” and ”DI” Operations
Operation MeaningOperand
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TAK Exchange accumulator contents
The contents of ACCUM 1 and ACCUM 2 are exchanged
independent of the RLO. The RLO and condition codes are not
affected.
STS Immediate Stop
The CPU is brought to STOP independently of the RLO.
DI* Execute indirect
An operation is indicated via a formal operand.
Formal
operand
* DI must not be used in safety-related program sections
Processing the ”STS” operation
When the ”STS” operation is executed, the CPU goes into the ”STOP” mode immediately. Program
scanning is terminated at this point. The ”STOP” state can only be canceled manually (with the
mode selector) or with the programmer function ”PLC START”.
3.4 Condition Code Generation
The processor of the S5-115F programmable controller has the following three condition codes:
• CC 0
• CC 1
• OV (overflow)
The following operations affect the condition codes:
• Comparison operations
• Arithmetic operations
• Shift operations
• Some conversion operations
The state of the condition codes represents a condition for the various jump operations.
EWA 4NEB 811 6149-02
3-69
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