Siemens Memory Specifications download pdf (Page 20)

2 S7-1200/1500 Innovations

2.9 Instructions

Programming Guideline for S7-1200/1500

V1.2, Entry ID: 81318674

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2.9 Instructions

2.9.1 CALCULATE

With the CALCULATE instruction you can carry out mathematical calculations (e.g.

(IN1 + IN2) * IN3) that are independent from the data type. The mathematical

formula is programmed in the formula editor of the instruction.

Figure 2-13: CALCULATE instruction with formula editor

Note

For more information refer to the Online Help of the TIA Portal with the

“CALCULATE” instruction.

Advantages

 A mathematical formula only needs one instruction

 Time saving due to simple configuration

Properties

 Supports bit sequences, integers, floating-point numbers

 Supports numerous mathematical functions (all basic arithmetic operations,

trigonometric functions, rounding, logarithm, etc.)

 Number of inputs is extendable

Recommendation

 Always use the CALCULATE instruction for mathematical calculations instead

of many calls of instructions, such as, e.g. ADD, SUB, etc.

2.9.2 MOVE instructions

STEP 7 (TIA) provides the following MOVE instructions. The instruction

MOVE_BLK_VARIANT for S7-1200/1500 is new.

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 73 74

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Siemens Memory Specifications Page 20