Chapter 6 Applied Instructions Symbol Xno ： The starting device number of X to refresh n ： Number of I/O points states to refresh 6_ Filter ： Filtering time to refresh (unit: µs) Explanation 1. This instruction works only with ISPSoft V3.06 or later versions. 2. Xno is the starting input number to refresh (X0~X7 and X10~17). Length is the length to refresh. When Xno is X3, the value of Length is 3, after executing the REFF instruction, the input filtering time of X3 ~ X5 are refreshed. 3. Xno and Length should be set in the input of PLC input system.
If the setting exceeds the range, even if you have executed REFF instruction, the I/O will NOT be refreshed and error message will NOT be shown. 4. The filtering time unit is µs. This instruction is for refreshing the current filtering time; filtering time set in HWCONFIG will NOT be affected. But when the value of Filter in the instruction exceeds the setting range in HWCONFIG, PLC treats the value of Filter as the maximum or the minimum value set in HWCONFIG. 5. When power-on, the filtering time of the CPU is refreshed according to the filtering time set in HWCONFIG. 6. The REFF instruction refreshes the filtering time only at its first execution.
6-177 API Instruction code Operand Function 0602 REFF P Xno, Length, Filter Refreshing the I/O filtering time Device X Y M S T C HC D FR SM SR E K 16# “$” F Xno Length Filter BOOL WORD DWORD LWORD UINT INT DINT LINT REAL LREAL TMR CNT STRING Data type Xno Length Filter Pulse instruction 16-bit instruction 32-bit instruction ES3 ES3 －