4-2 Function Mode •Set a larger data value if stable operation cannot be secured because of noise. Note that the larger the data value is, the slower the response time. This parameter specifies a filter time constant for a set value of 1 to 30 (Ч 2 ms). •When "31." is selected, a filter time constant of 500 ms and a hysteresis of ±0.1 Hz are set. (Factory default) Multi-step Speed Operation Function •You can set RUN speeds using codes and switch between the set speeds via the terminal. •For multi-step speed operation, you can select either 4-terminal binary operation (with 16 steps max.) or 7-terminal bit operation (with 8 steps max.).
4 Functions * To switch to the 2nd/3rd control, allocate 08 (SET)/17 (SET3) to the desired multi-function input and then turn it on. •During multi-step speed operation, if frequency reference selection A001 is set to the terminal (01), and the external analog input (FV, FE, FI) setting mode based on a combination of FV/FI selection A005, FE selection A006, and the AT terminal is set to "reversible", the RUN command is inverted when "main frequency reference + auxiliary frequency reference" is less than zero. „ Binary Operation •By allocating 02 to 05 (CF1 to CF4) to any of multi-function inputs 1 to 8 (C001 to C008), you can select from multi-step speeds 0 to 15.
•Use A021 to A035 (multi-step speeds 1 to 15) to set frequencies for speeds 1 to 15. •When the Digital Operator is selected as the frequency reference, speed 0 is set with A020/A220/ A320 or F001 (refer to page 4-8). When the control circuit terminal block is selected, speed 0 is set with terminals FV, FE, and FI. 4-16 Parameter No. Function name Data Default setting Unit A019 Multi-step speed selection 00: Binary: 16-step selection with 4 terminals 01: Bit: 8-step selection with 7 terminals 00 A020 Multi-step speed reference 0 0.0/Starting frequency to Max.
frequency 6.0 Hz A220 *2nd multi-step speed reference 0 A320 *3rd multi-step speed reference 0 A021 Multi-step speed reference 1 0.0 A022 Multi-step speed reference 2 A023 Multi-step speed reference 3 A024 Multi-step speed reference 4 A025 Multi-step speed reference 5 A026 Multi-step speed reference 6 A027 Multi-step speed reference 7 A028 to A035 Multi-step speed references 8 to 15