# Slot 3 Menu 6 − Special Functions

Mode: RFC‑S

Parameter | 3.06.001 Hard-Speed Reference High Resolution
--- | ---
Short description |
Minimum | -2147483.648 | Maximum | 2147483.647
Default |  | Units | rpm
Type | 32 Bit Volatile | Update Rate | Immediate
Display Format | Standard | Decimal Places | 3
Coding | RW, ND

This parameter allows the user to write the drive speed reference with a resolution of 0.001 rpm instead of 0.1 rpm with Hard Speed Reference (03.022) on the drive.

The follow conditions are required to allow Hard-Speed Reference High Resolution (3.06.001) to have effect:

- The reference is on (Reference On (01.011) is 1) and the hard speed reference is selected (Hard Speed Reference Select (03.023) is 1). Both drive parameters.
- Use hard speed reference selection (3.06.002) is set to 1.

This parameter has effect in RFC-A and RFC-S drive modes. Otherwise is ignored.

Values written to this parameter are passed to the drive immediately and actioned by the drive every 250us.

Parameter | 3.06.002 Use hard speed reference selection
--- | ---
Short description |
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 1 Bit User Save | Update Rate | Immediate
Display Format | Standard | Decimal Places | 0
Coding | RW

If 1, use the value in Hard-Speed Reference High Resolution (3.06.001) as a drive hard-speed reference. Otherwise use Hard Speed Reference (03.022) on the drive.

Parameter | 3.06.003 Speed Set Point
--- | ---
Short description | Value mirrored in drive PR 01.021
Minimum | -2147483.648 | Maximum | 2147483.647
Default | 0.000 | Units | rpm
Type | 32 Bit Volatile | Update Rate | 250µs
Display Format | Standard | Decimal Places | 3
Coding | RW

This parameter allows the user to write the drive speed reference with a resolution of 0.001 rpm instead of 0.1 rpm. This value is mirrored in drive Pr 01.021 (preset speed 1), therefore in order to control the drive speed with this parameter ensure preset speed 1 is selected on the drive (Pr 01.014=3, Pr 01.015=1).

Ensure bit 0 of Short Cut Enable (3.06.004) is set and the full-scale speed in Full Scale Speed (3.06.005) is set accordingly when using this parameter.

This parameter has effect on RFC-A and RFC-S drive modes. Otherwise is ignored.

Parameter | 3.06.004 Short Cut Enable
--- | ---
Short description | Enables various short cuts
Minimum | 0 | Maximum | 3
Default | 0 | Units |
Type | 8 Bit User Save | Update Rate | 250µs
Display Format | Standard | Decimal Places | 0
Coding | RW, BU

This parameter enables the short-cut parameters detailed later in this section. You must set the appropriate bit in this parameter. See the following table.

Bit | Function | Related parameter
0 | Speed Set Point enable | Speed Set Point (3.06.003)
1 | Enable Hard Speed Ref High Res | Hard-Speed Reference High Resolution (3.06.001)
2 | Reserved |
3 | Reserved |
4 | Reserved |
5 | Reserved |
6 | Reserved |
7 | Reserved |

Note Bit 1 is a duplicate of Use hard speed reference selection (3.06.002) which is maintained for backwards compatibility.

Parameter | 3.06.005 Full Scale Speed
--- | ---
Short description | Limits the max speed
Minimum | -120000 | Maximum | 120000
Default | 3000 | Units | rpm
Type | 32 Bit Volatile | Update Rate | 250µs
Display Format | Standard | Decimal Places | 0
Coding | RW

Set this to the maximum (absolute) speed that will ever be written to with Speed Set Point (3.06.003) or Hard-Speed Reference High Resolution (3.06.001) .This is in units of 1 rpm.
This value is applied on the next write to SpeedSetPoint or HighSpeedRefHighRes.

This determines the resolution for the speed values sent to the drive. Attempting to write speed values to Speed Set Point (3.06.003) or Hard-Speed Reference High Resolution (3.06.001) greater than the rpm value specified in Full Scale Speed (3.06.005) will result in the value being limited or a value over range run-time error.

When the drive is in Closed Loop Vector mode, in the event of a module reset Full Scale Speed (3.06.005) will default to 3000 rpm.

Parameter | 3.06.008 Drive analog input 1 value
--- | ---
Short description |
Minimum | -4000 | Maximum | 4000
Default | 0 | Units |
Type | 16 Bit Volatile | Update Rate | 250µs
Display Format | Standard | Decimal Places | 0
Coding | RO

This value will be taken from the drive’s analog input 1 and is scaled for ±4000 to represent the +/- full scale signal at the input.

Parameter | 3.06.009 Drive analog input 2 value
--- | ---
Short description |
Minimum | -2047 | Maximum | 2047
Default | 0 | Units |
Type | 16 Bit Volatile | Update Rate | 250µs
Display Format | Standard | Decimal Places | 0
Coding | RO

This value will be taken from the drive’s analog input 2 and is scaled for ±2047 to represent the +/- full scale signal at the input.

Parameter | 3.06.010 Drive analog input 3 value
--- | ---
Short description |
Minimum | -2047 | Maximum | 2047
Default | 0 | Units |
Type | 16 Bit Volatile | Update Rate | 250µs
Display Format | Standard | Decimal Places | 0
Coding | RO, PT

This value will be taken from the drive’s analog input 3 and is scaled for ±2047 to represent the +/- full scale signal at the input.