Function blocks1551SVC 440 795 M1100• Range A: Compare >I1 > >I2– The actual value >I1 increases.– The contact switches when the actual reaches the setpointvalue.– The actual value changes and falls below the setpoint valueminus the hysteresis.– The contact goes to the normal position.• Range B: Compare >I1 < >I2– The actual value drops.– The contact switches if the actual value reaches the setpointvalue.– The actual value changes and rises above the value of thesetpoint value plus hysteresis.– The contact goes to the normal position.• Range C: Compare >I1 > >I2 with offset– This example behaves as described in Range A. The offsetvalue is added to the actual value.• Comparison >I1 = >I2 The contact switches on:– If the setpoint is exceeded with the actual value rising.– If the setpoint is undershot with the actual value decreasing.The contact switches off:– If the hysteresis limit is exceeded with the actual value rising.– If the hysteresis limit is undershot with the actual valuedecreasing.Arithmetic function blockThe display system provides 32 arithmetic function blocksAR01 to AR32.The arithmetic function block is used for arithmeticoperations. All four basic arithmetic operations aresupported:• add,• subtract,• multiply,• divide.
