Chapter 6 – Parameters
6-2 ACH 500 Programming Manual
Main 10 Control
Connections
Group 10.1
Start/Stop/Direction
These parameter values can only be altered with the ACH 500 stopped. The
Range/Unit column in Table 6-1 shows parameter values. The text following
the table explains parameter values in detail.
Table 6-1 Group 10.1
1 EXT 1
STRT/STP/DIR
This parameter selects the Digital Inputs used for Start/Stop and Reverse
commands.
NOT SEL
No Digital Input selected.
DI1
Two-wire start/stop.
0 V DC = Stop and 24 V DC = Start. Rotation direction is fixed.
DI1,2
Two-wire start/stop and direction.
Start/Stop is connected to DI1 and Reverse to DI2. 0 V DC on DI2 = Forward
and 24 V DC = Reverse.
DI1P,2P
Three-wire start/stop.
Start/Stop commands are from momentary push-buttons. The stop push-
button is normally closed, and connected to DI2. The start push-button is
normally open, and connected to DI1. Multiple start push-buttons are
connected in parallel, and stop push-buttons in series.
DI1P,2P,3
Three-wire start/stop and direction.
Refer to DI1,2. Reverse is connected to DI3. 0 V DC = Forward, 24 V DC =
Reverse.
Parameter Range/Unit Description
1 EXT 1
STRT/STP/DIR
Not Sel/Digital
Inputs
External control reference R1 start/
stop and direction input.
2 EXT 2
STRT/STP/DIR
Not Sel/Digital
Inputs
External control reference R2 Start/
stop and direction input.
3 DIRECTION Reverse/Forward/
Request/Fast Rev
Rotation direction lock.
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