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Download 1763-RM001 - Rockwell Automation
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Sequencer Instructions 241 The following figure explains how the SQC instruction works. SQC SQC Sequencer Compare File #B10:11 Mask FFF0 Source I:3.0 Control R6:21 Length 4< Position 2< EN DN FD Input Word I:3.0 0010 0100 1001 1101 Mask Value FFF0 1111 1111 1111 0000 Sequencer Ref File #B10:11 Word B10:11 B10:12 B10:13 0010 B10:14 B10:15 0100 1001 0000 Step 0 1 2 3 4 SQC FD bit is set when the instruction detects that an input word matches (through mask) its corresponding reference word. The FD bit R6:21/FD is set in the example, since the input word matches the sequencer reference value using the mask value. This instruction uses the following operands: • File - This is the sequencer reference file. Its contents, on an element-by-element basis, are masked and compared to the masked value stored in source. TIP If file type is word, then mask and source must be words. If file type is long word, mask and source must be long words. Publication 1763-RM001D-EN-P - September 2011
