ABB ACH550 series, User Manual

Page: 199 / 478

194 Parameter listing and descriptions
ACH550-01 User's Manual
Group 12: CONSTANT SPEEDS
This group defines a set of constant speeds. In general:
• You can program up to 7 constant speeds, ranging from
0…500 Hz or 0…30000 rpm.
• Values must be positive (no negative speed values for
constant speeds).
• Constant speed selections are ignored if:
- the process PID reference is followed, or
- the drive is in local control mode, or
- PFA (Pump and Fan Alternation) is active.
Note: Parameter 1208
CONST SPEED
7 acts also as a so-called
fault speed, which may be activated if the control signal is lost.
Refer to parameter 3001
AI
<
MIN FUNCTION
, parameter 3002
PANEL COMM ERR
and 3018
COMM FAULT FUNC
.
Code Description Range
1201 CONST SPEED SEL -14…19
Defines the digital inputs used to select constant speeds. See general
comments in the introduction.
0 =
NOT SEL
– Disables the constant speed function.
1 =
DI
1 – Selects constant speed 1 with digital input
DI
1.
• Digital input activated = constant speed 1 activated.
2…6 =
DI
2…
DI
6 – Selects constant speed 1 with digital input
DI
2…
DI
6.
• See above.
7 =
DI
1,2 – Selects one of three constant speeds (1…3) using
DI
1 and
DI
2.
• Uses two digital inputs, as defined below (0 =
DI
de-activated, 1 =
DI
activated):
• Can be set up as a so-called fault speed, which is activated if the
control signal is lost. Refer to parameter 3001
AI
<
MIN
function and
parameter 3002
PANEL COMM ERR
.
DI
1
DI
2 Function
0 0 No constant speed
1 0 Constant speed 1 (1202)
0 1 Constant speed 2 (1203)
1 1 Constant speed 3 (1204)
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