Schneider Altivar 28 Manual De Usario página 66

Configurable I/O Application Functions
Preset speeds
2, 4 or 8 speeds can be preset, and requiring 1, 2, or 3 logic inputs respectively.
The following assignment order must be observed : PS2 (LIx), then PS4 (LIy), then PS8 (LIz).
2 preset speeds
Assign : LIx to PS2
LIx speed reference
0 Reference (min = LSP)
1 HSP
To unassign the logic inputs, the following order must be observed : PS8 (LIz), then PS4 (LIy), then PS2
(LIx).
Reference switching
Two references are switched (AI1 reference and AI2 or AIC reference) by a command on a logic input.
This function automatically assigns AI2 or AIC to speed reference 2.
Connection diagram
LI x + 24 COM AI 1
67
4 preset speeds
Assign : LIx to PS2, then LIy to PS4 Assign : LIx to PS2, then
LIy LIx speed reference
0 0 Reference (min = LSP)
0 1 SP2
1 0 SP3
1 1 HSP
Contact open, reference = AI2 or AIC
AI 2 or
+10 AI C
Contact closed, reference = AI1
If AI2/AIC is assigned to the PI function, operation combines
both functions, (see page 70)
8 preset speeds
LIy to PS4, then LIz to PS8
LIz LIy LIx speed reference
0 0 0 Reference (min = LSP)
0 0 1 SP2
0 1 0 SP3
0 1 1 SP4
1 0 0 SP5
1 0 1 SP6
1 1 0 SP7
1 1 1 HSP