NI PXI-8431/2 Vector network analyzer

Comparisons/conditions In contrast to the operations discussed in the Chapters above, where an analog, digital or binary result has been produced and assigned to a result variable via an assignment operator, comparison and condition operators do not provide a result. Comparisons or conditions can only be “true” (satisfied) or “false” (not satisfied). This is not considered as a result but the value of the comparison or the condition. The value of a comparison or condition can only be The last condition means, for example, that the control step containing this condition will only be carried out after the temperature (.TEMP) has fallen below an upper limit (.OGRE) minus 3 %

Logic UNDings and ODRings 

with constants within the value range 0 to 32767 have an exact effect. Constants within the value range 32768 to 65535 cannot be represented as integer values. A constant within this range of values that is to be interconnected must therefore be indicated as inverted number. Example: The decimal value 61440 corresponds to HEXA F000. In the AS system, this value is shifted to the right by the sign location and is represented as HEXA 7800. The interconnection of e.g. LA1 UND 61440 =:LA2 would yield an incorrect result in LA2 if a number  2048 figured in LA1. Yet the result becomes correct if the constant 61440 is specified as an inverted number.

Address comparison 

Incorrect results are possible if the arithmetic comparison function “==“ is used for comparing addresses. Correct address comparison requires direct comparison of the two exponents (TYP) and the two mantissas (blockno).Initialization block Subroutine Initialization block with internal block number Subroutine with internal block number Function algorithm Check algorithm End of definition

Professional service

In industrial automation, if you're looking for a new product or production of remaining parts, our knowledgeable and friendly colleagues can help you gain the required things, with our competitive prices, we will be proud to provide you with the necessary spare parts inventory

Superior products

Main products include DCS control system spare parts, PLC system spare parts and robot system spare parts,

Advantage brands: Allen Bradley, BentlyNevada, ABB, Emerson Ovation, Honeywell DCS, Rockwell ICS Triplex, B&R, FOXBORO, Schneider PLC, GE Fanuc, Motorola, HIMA, TRICONEX, Prosoft and other imported industrial parts