Chapter 6 Applied Instructions t=1000ms Y0.0 T=2000ms Additional remark: 1. The instruction counts by the scan cycle. Therefore, the maximum error is one scan cycle. Besides, S 1 , S 2 , and ( S 2 - S 1 ) should be larger than the scan cycle. Otherwise, an error occurs when the instruction GPWM is executed. 2. If the instruction is used in the function block or the interrupt task, the inaccurate pulse output will occur. 3. If users declare the operand S 2 in ISPSoft, the data type will be ARRAY [3] of WORD/INT. 6-433