SSINVERTER SSI700, User Manual, Page: 35 / 148

SSI700 User Manual Operation, Display and Application Example
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According to the preceding figure, when the running frequency of the AC drive is set by
means of communication (P0-03 = 9) and reverse control is enabled (P8-13 = 0), the AC
drive instructs the reverse direction if the set frequency Fs is a negative value.
If the give running command is reverse rotation or the set frequency is a negative value,
but reverse control is disabled (P8-13 =1), the AC drive will run at 0 Hz and has no output.
In some applications where reverse rotation is prohibited, do not change the rotating
direction by modifying the function codes because the function codes will be restored
once the AC drive restores the default settings.
4.6.9 Setting the Fixed Length Control Mode
The SSI700 has the fixed length control function. The length pulses are sampled by the DI
allocated with function 27 (Length count input). The "Actual length" (11-06) is obtained by
dividing the number of pulses sampled by the value of 11-07 (Number of pulses per
meter). If the actual length is larger than the "Set length" (11-05), the multifunctional DO
terminal becomes ON.
In the process of fixed length control, the length can be reset by means of the DI terminal
allocated with function 28 (Length reset). The related setting is shown in the following
figure.
Figure 4-26 Function code setting for fixed length control
Notes
• In the fixed length control mode, the direction cannot be identified and only the length shall be
calculated based on the number of pulses.
• Only DI5 can be allocated with the function "Length count input".
• An automatic stop system can be implemented if the length reached signal output by the DO is
fed back to the AC drive input terminal with the stop function.
Figure 4-27 Common application example of the fixed length control function