Emerson Mentor MP Advanced User's Manual page 36

Parameter
Menu 2
structure
2.01 Post ramp reference
Bit SP
Coding
Range ±SPEED_MAX rpm
Update rate 4ms write
2.02 Ramp enable
Bit SP
Coding
1
Default 1
Update rate 4ms read
2.03 Ramp hold
Bit SP
Coding
1
Default 0
Update rate 4ms 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 set to 1 the final speed reference is the post ramp reference plus the hard speed reference (provided that the hard speed reference is enable
and the reference is on).
2.06 S ramp enable
Bit SP
Coding
1
Default EUR: 0 / USA: 1
Update rate 4ms 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
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 (Δ w*) is given by:
Speed
T Δw* x A / See Pr 2.39
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 below.
36
Keypad and
Parameter x.00
display
FI DE Txt VM DP ND RA NC NV
1 1 1
FI DE Txt VM DP ND RA NC NV
FI DE Txt VM DP ND RA NC NV
FI DE Txt VM DP ND
FI DE Txt VM DP ND RA NC NV
FI DE Txt VM DP ND RA NC NV
3
2
/1,000rpm
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Parameter description Advanced parameter
format
PT US RW BU
1 1
PT US RW BU
1 1
PT US RW BU
1 1
RA NC NV PT US RW BU
1
PT US RW BU
1 1
PT US RW BU
1 1
Serial comms
descriptions protocol
PS
PS
1
PS
PS
1
PS
PS
1
Mentor MP Advanced User Guide
Performance
Issue Number: 1