DVP-ES3 Series Programming Manual Note: You must set the lower bound ( S 2 ) to be less than the upper bound ( S 3 ). If you set the zone boundaries incorrectly, the PLC automatically makes the adjustment. 3. If S 1 specifies a hardware counter and the value of the specified counter reaches the lower bound ( S 2) or the upper bound ( S 3 ), the DHSZ instruction makes the comparison immediately according to the count direction (up/down). The comparison condition and output state are shown in the following table. 4. If the device specified by D is Y0–Y7 and Y10–Y13, the comparison result is output to the external output terminals Y0–Y7 and Y10–Y13.
Other Y devices are affected by the scan cycle, but this instruction updates all devices immediately and is not affected by the scan cycle. _6 5. Refer to the DHSCS instruction (API 1005) for more information on the high-speed zone comparison. Example 1. When D is specified as Y10, Y11–Y12 are also specified automatically. 2. The instruction compares the current value in HC200 with the upper/lower bound (1500/2000) of the comparison zone, and one of Y10–Y12 is ON according to the comparison result. 3. When the current value in HC200 When the current value in HC200>=2000, Y12 is ON.
6-290 Count direction Comparison condition D+0 state D+1 state D+2 state Count up The count value of S1 == the lower bound (S2) OFF ON OFF The count value of S1 == the upper bound (S3) OFF OFF ON Count down The count value of S1 == the lower bound (S2) ON OFF OFF The count value of S1 == the upper bound (S3) OFF ON OFF