Emerson Powerdrive F300 Reference Manual page 37

Parameter 02.001 Post Ramp Reference
Short description Displays the output of the ramp system
Mode Open‑Loop
Minimum −VM_SPEED_FREQ_REF
Default
Type 32 Bit Volatile
Display Format Standard
Coding RO, VM, ND, NC, PT
The Post Ramp Reference (02.001) is combined with the slip compensation frequency to define the output frequency of the drive. The
Post Ramp Reference (02.001) is defined by the output of the ramp system except when the current limits are active (see Menu 4).
Parameter 02.003 Ramp Hold
Short description Set to 1 to hold the ramp system at its present value
Mode Open‑Loop
Minimum 0
Default 0
Type 1 Bit User Save
Display Format Standard
Coding RW
If Ramp Hold (02.003) = 0 the ramp system functions normally. If Ramp Hold (02.003) is set to 1 and S Ramp Enable (02.006) = 0 the ramp system
output is held at its current level. If Ramp Hold (02.003) is subsequently set to 0 the ramp system output is released and continues to operate normally.
If S Ramp Enable (02.006) = 1 when Ramp Hold (02.003) is set to 1 the acceleration will ramp towards zero and the frequency or speed will change in
an S curve towards a constant speed. If a drive stop is requested (i.e. Reference On (01.011) = 0) the ramp hold function is disabled.
Parameter 02.004 Ramp Mode
Short description Defines the mode used by the ramp system
Mode Open‑Loop
Minimum 0
Default 1
Type 8 Bit User Save
Display Format Standard
Coding RW, TE
Value Text
0 Fast
1 Standard
2 Std boost
Acceleration is defined as a positive (forward) or negative (reverse) frequency or speed change away from zero, and deceleration is defined as a
change towards zero. Ramp Mode (02.004) defines the ramp mode used for deceleration. During acceleration the frequency or speed changes are
based on the final acceleration rate only.
0: Fast ramp
During deceleration the frequency or speed changes are based on the final deceleration rate.
Powerdrive F300 Parameter Reference Guide
Issue: 01.15.00
Maximum VM_SPEED_FREQ_REF
Units
Update Rate 4ms write
Decimal Places 1
Maximum 1
Units
Update Rate 250µs read
Decimal Places 0
Maximum 2
Units
Update Rate 4ms read
Decimal Places 0
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