Chapter 6 – Parameters
ACH 500 Programming Manual 6-3
DI1P,2P,3P
Start forward, start reverse, and stop.
Start and direction commands are given simultaneously with two separate
momentary push-buttons. The stop push-button is normally closed, and
connected to DI3. The start forward push-button is normally open, and
connected to DI1. The start reverse push-button is normally open, and
connected to DI2. Multiple start push-buttons are connected in parallel, and
stop push-buttons in series.
DI6
Two-wire start/stop.
0 V DC = Stop and 24 V DC = Start. Rotation direction is fixed.
DI6,5
Two-wire start/stop and direction.
Start/Stop is connected to DI6 and Reverse is connected to DI5. 0 V DC on
DI5 = Forward.
KEYPAD
Start/Stop command and Direction command are from the Keypad for Ext 1.
2 EXT 2 STRT/STP/DIR
This parameter selects the Digital Inputs used for Start/Stop and Reverse
commands. The choices are the same as Parameter 10.1.1 (Ext 1 Strt/Stp/Dir).
3 DIRECTION
This parameter allows you to fix rotation direction to FORWARD or
REVERSE. If you select REQUEST, the rotation direction is selected by
Digital Inputs as defined in Parameters 10.1.1 (Ext 1 Strt/Stp/Dir) and 10.1.2
(Ext 2 Strt/Stp/Dir) or by keypad push-button. If FAST REV is selected, and
Parameter 20.2.3 (Stop Function) is set to COAST, the modulator starts to
operate in a reverse direction immediately when REVERSE is requested. This
procedure results in fast reversing.
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