Post Ramp Reference/Ramp Enable; Ramp Hold/Ramp Output Selector; S Ramp Enable; S Ramp Acceleration Limit - Emerson Mentor MP Advanced User's Manual

Parameter
Menu 2
structure
2.01
Post ramp reference
{di03, 0.38}
Bit SP
Coding
Range ±SPEED_MAX rpm
Update rate 4 ms write
2.02 Ramp enable
Bit SP
Coding
1
Default 1
Update rate 4 ms read
2.03 Ramp hold
Bit SP
Coding
1
Default 0
Update rate 4 ms read
If this bit is set the ramp will be held. If S ramp is enabled the acceleration will ramp towards zero causing the ramp output to curve towards a constant
speed. If a drive stop is demanded the ramp hold function is disabled.
Ramp output selector
2.05
Bit SP
Coding
1
Default 1
Update rate Background read
When Pr 2.05 is set to 0 the speed reference is set to zero.
When set to 1 the speed reference is equal to the post ramp reference.
2.06

S ramp enable

Bit SP
Coding
1
Default Eur: 0 / USA: 1
Update rate 4 ms read
Setting this parameter enables the S ramp function.
2.07

S ramp acceleration limit

Bit SP
Coding
Range
0.000 to 100.000 s /1,000 rpm
Default 3.600
Update rate Background read
This parameter defines the maximum rate of change of acceleration/deceleration. If the S ramp is disabled (Pr 2.06 = 0) a linear ramp is used and the
time in seconds taken for the ramp output to change by speed (⊗ w*) is given by:
Speed
⊗w* x A / See Pr 2.39
T
Ramp =
Where A is the selected ramp rate in s / See Pr 2.39
If the S ramp is enabled (Pr 2.06 = 1) then the ramp time is extended as shown in the diagram opposite.
36
Keypad and
FI DE Txt VM DP ND
1 1 1
FI DE Txt VM DP ND
FI DE Txt VM DP ND
FI DE Txt VM DP ND RA
FI DE Txt VM DP ND
FI DE Txt VM DP ND
3
2
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Advanced parameter
format
Parameter description
RA NC NV PT US RW BU
1 1
RA NC NV PT US RW BU
1 1
RA NC NV PT US RW BU
1 1
NC NV PT US RW BU
1
RA NC NV PT US RW BU
1 1
RA NC NV PT US RW BU
1 1
Serial comms
protocol
descriptions
PS
PS
1
PS
PS
1
PS
PS
1
Mentor MP Advanced User Guide
Performance
Issue Number: 4