ABB ACH550-VCR - Page 102

1-98 ACH550-UH User’s Manual
Parameters
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 torque control is active, or
– the process PID reference is followed, or
– the drive is in local control mode, or
– PFA (Pump-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. For example, see parameters 3001
AI<MIN FUNCTION, 3002 PANEL COMM ERR and 3018 COMM FAULT FUNC.
Group 12: Constant Speeds
Code Description Range Resolution Default S
1201 CONST SPEED SEL -14 …19 1 3 (DI3) 
Defines the digital inputs used to select Constant Speeds. See general comments in introduction.
0 =
NOT SEL – Disables the constant speed function.
1 =
DI1 – Selects Constant Speed 1 with digital input DI1.
• Digital input activated = Constant Speed 1 activated.
2…6 = DI2…DI6 – Selects Constant Speed 1 with digital input DI2…DI6. See above.
7 =
DI1,2 – Selects one of three Constant Speeds (1…3) using DI1 and DI2.
• 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.
8 =
DI2,3 – Selects one of three Constant Speeds (1…3) using DI2 and DI3.
• See above (
DI1,2) for code.
9 =
DI3,4 – Selects one of three Constant Speeds (1…3) using DI3 and DI4.
• See above (
DI1,2) for code.
10 =
DI4,5 – Selects one of three Constant Speeds (1…3) using DI4 and DI5.
• See above (
DI1,2) for code.
11 =
DI5,6 – Selects one of three Constant Speeds (1…3) using DI5 and DI6.
• See above (
DI1,2) for code.
DI1 DI2 Function
0 0 No constant speed
1 0 Constant speed 1 (1202)
0 1 Constant speed 2 (1203)
1 1 Constant speed 3 (1204)