Public:IFM DDxxx

1 Settings

1. Set the start-up delay
2. Set the switch point (pulses /min.) (basic value)
3. Set the hysteresis
4. LED lights when the output relay is energized
5. LED: indication of the input pulses
6. LED: operating voltage ok
7. Set the switching function
8. Multiplication factor for the setting of the switch point

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(Modes are selected with switch number 7)

I Operating state: Minimum rotational speed reached/ standstill

The output relay energizes when the input frequency (pulses/min) becomes lower than the set switch point (SP). If the input frequency becomes higher again, the relay switches back at the switch point + hysteresis (SP +Hy).

The output relay is de-energized during the start-up delay and as Long as the input frequency is higher than the set switch point.

II Fault state: Below minimum rotational speed

The output relay de-energizes when the Input frequency (pulses/min) becomes lower than the set switch point (SP). If the input frequency becomes higher again, the relay switches back at the switch point + hysteresis (SP +Hy). The output relay is energized during the start-up delay and as long as the input frequency is higher than the set switch point.

III Operating state: maximum rotational speed reached

The output relay energizes when the Input frequency becomes higher than the set switch point + hysteresis (SP +Hy). If the input frequency becomes lower again, the relay switches back at the switch point (SP). The output relay is de-energized during the start-up delay and as long as the input frequency is lower than the set switch point + hysteresis.

IV Fault state: rotational speed exceeded

The output relay de-energizes when the input frequency becomes higher than the set switch point + hysteresis (SP +Hy). If the input frequency becomes lower again, the relay switches back at the switch point (SP). The output relay is energized during the start-up delay and as long as the input frequency is lower than the set switch point + hysteresis.

Relay energized = transistor output conductive,
relay de-energized = transistor output blocked.

2 Adjustment for Grinder

To know the Imp/round you have to remove the cover of the belts and also the belts. Then you take a look at the Impulse Sensor, which has as indicator a small LED. You turn the wheel one time (360°) and count how often the LED lights.

For Example:

Grinder Type: 80-140 CL | No.: R1200973 | 6000kg | 420 1/min

This Grinder has 12 Impulses per round. You see the calculation at the picture (Example 2)

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