EM8 User's Manual
5.The Concrete Explanation of Function Parameters
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each step in the programmable multi-step running.
When programmable multi-step function is valid, these parameters are valid ([C-14]
≠ 0).
Parameter C-14 defines how the programmable multi-step is working:
Tens-digit of the LED: Time unit of simple PLC running.
1: Minute
0: Second
Ones-digit of the LED: Running mode of the PLC.
*0: Programmable multi-step running is invalid.
*1: Single cycle.
When get running command, the inverter will run with multi-step 1 ( set with b- 18),
whose running time is set with parameter C-15. After a set running time, the inverter will go on to the next
step. You can set the running time for each step. When all 7 steps are finished, the inverter will output 0
frequency. If you set zero running time for a step, it will be skipped in running.
*2: Continuous cycle.
The inverter will go back to step 1 and continuously running in cycle after all 7
steps are finished.
*3: Keep last step.
After the single cycle, the inverter will keep running with the last step whose running
time is non-zero rather than stop. Keep last step mode is shown as diagram 5-28.
*4: Swing frequency.
The inverter changes the frequency according to a preset acceleration/deceleration
time periodically. This function is especially useful in textile industry, in which the system needs to change
the rotation speed according to the changing spool diameter. Swing frequency running is shown as diagram
5-29.
*5: Single cycle and stop.
After every step, the inverter will decelerate to zero frequency and then
accelerate to the frequency required in the next step, while other running is the same as mode 1. Single
cycle and stop mode is shown as diagram 5-30.
*6: Continuous cycle and stop.
After every step, the inverter will decelerate to zero frequency and then
accelerate to the frequency required in the next step, while other running is the same as mode 2.
*7: Keep last step and stop.
After every step, the inverter will decelerate to zero frequency and then
accelerate to the frequency required in the next step, while other running is the same as mode 3.
Diagram 5-28: Keep last step (mode 3)
