Menu 12 − User Functions 2 and Brake Control

Mode: RFC‑A

Menu 12 provides parameters for the following features:

  1. Threshold detectors
  2. Variable selectors
  3. Mechanical brake controller


Parameter12.001  Threshold Detector 1 Output
Short descriptionDisplays the output of threshold detector 1
ModeRFC‑A
Minimum0Maximum1
Default Units 
Type1 Bit VolatileUpdate Rate4ms write
Display FormatStandardDecimal Places0
CodingRO, ND, NC, PT

The threshold detector functions are always active even if the source and destination are not routed to valid parameters. If the source is not a valid parameter then the source value is taken as 0. The update rate for each of the threshold detector functions is always 4ms.

The following description is for threshold detector 1, but threshold detector 2 operates in the same way. The level of the parameter defined by Threshold Detector 1 Source (12.003) is converted to a percentage and compared to Threshold Detector 1 Level (12.004) with hysteresis to give Threshold Detector 1 Output (12.001) as follows:

Source Threshold Detector 1 Output (12.001)
Source < Lower threshold 0
Lower threshold ≤ Source < Upper threshold No change of state
Source ≥ Upper threshold 1

Lower threshold = Threshold Detector 1 Level (12.004) - (Threshold Detector 1 Hysteresis (12.005) / 2)

Upper threshold = Threshold Detector 1 Level (12.004) + (Threshold Detector 1 Hysteresis (12.005) / 2)

The output value can then be inverted with Threshold Detector 1 Output Invert (12.006) before being routed to the destination defined by Threshold Detector 1 Destination (12.007).


Parameter12.002  Threshold Detector 2 Output
Short descriptionDisplays the output of threshold detector 2
ModeRFC‑A
Minimum0Maximum1
Default Units 
Type1 Bit VolatileUpdate Rate4ms write
Display FormatStandardDecimal Places0
CodingRO, ND, NC, PT

See Threshold Detector 1 Output (12.001).


Parameter12.003  Threshold Detector 1 Source
Short descriptionDefines the source paramter for threshold detector 1
ModeRFC‑A
Minimum0.000Maximum30.999
Default0.000Units 
Type16 Bit User SaveUpdate RateDrive reset read
Display FormatStandardDecimal Places3
CodingRW, PT, BU

See Threshold Detector 1 Output (12.001).


Parameter12.004  Threshold Detector 1 Level
Short descriptionDefines the reference level for threshold detector 1
ModeRFC‑A
Minimum0.00Maximum100.00
Default0.00Units%
Type16 Bit User SaveUpdate Rate4ms read
Display FormatStandardDecimal Places2
CodingRW

See Threshold Detector 1 Output (12.001).


Parameter12.005  Threshold Detector 1 Hysteresis
Short descriptionDefines the hysteresis for threshold detector
ModeRFC‑A
Minimum0.00Maximum25.00
Default0.00Units%
Type16 Bit User SaveUpdate Rate4ms read
Display FormatStandardDecimal Places2
CodingRW

See Threshold Detector 1 Output (12.001).


Parameter12.006  Threshold Detector 1 Output Invert
Short descriptionSet to 1 to invert the output of threshold detector 1
ModeRFC‑A
Minimum0Maximum1
Default0Units 
Type1 Bit User SaveUpdate Rate4ms read
Display FormatStandardDecimal Places0
CodingRW

See Threshold Detector 1 Output (12.001).


Parameter12.007  Threshold Detector 1 Destination
Short descriptionDefines the destination parameter for threshold detector 1
ModeRFC‑A
Minimum0.000Maximum30.999
Default0.000Units 
Type16 Bit User SaveUpdate RateDrive reset read
Display FormatStandardDecimal Places3
CodingRW, DE, PT, BU

See Threshold Detector 1 Output (12.001).


Parameter12.008  Variable Selector 1 Source 1
Short descriptionDefines the 1st source parameter for variable selector 1
ModeRFC‑A
Minimum0.000Maximum30.999
Default0.000Units 
Type16 Bit User SaveUpdate RateDrive reset read
Display FormatStandardDecimal Places3
CodingRW, PT, BU

The variable selector functions are always active even if the source and destination are not routed to valid parameters. If a source is not a valid parameter then the source value is taken as 0. The update rate for each of the variable selector functions is always 4ms.

The following description is for variable selector 1, but variable selector 2 operates in the same way. The source parameters selected with Variable Selector 1 Source 1 (12.008) and Variable Selector 1 Source 2 (12.009) are converted to a percentage value, scaled with Variable Selector 1 Source 1 Scaling (12.013) and Variable Selector 1 Source 2 Scaling (12.014) respectively and then combined with a function defined by Variable Selector 1 Mode (12.010) to give Variable Selector 1 Output (12.012) as a percentage value. If Variable Selector 1 Enable (12.016) = 1 then the function operates normally. If Variable Selector 1 Enable (12.016) = 0 then Variable Selector 1 Output (12.012) = 0.00% and any states within the function are reset (i.e. the time constant function accumulator is held at zero). If the value of Variable Selector 1 Mode (12.010) is changed then all internal function state are also reset.

The table below shows the functions that can be selected with Variable Selector 1 Mode (12.010).

Variable Selector 1 Mode (12.010) Variable Selector 1 Output (12.012)
0: Input 1 Input 1
1: Input 2 Input 2
2: Add Input 1 + Input 2
3: Subtract Input 1 - Input 2
4: Multiply (Input 1 x Input 2) / 100.00%
5: Divide (Input 1 x 100.00%) / Input 2
6: Time Const Input 1 / (1 + τs) where τ is Variable Selector 1 Control (12.015) in seconds
7: Ramp Input 1 is an input to a linear ramp function where the time to ramp from 0.00% to 100.00% of the input parameter range is defined by Variable Selector 1 Control (12.015) in seconds. e.g. if the input parameter is at 50% of its range, the output value will reach 50% in 50% of the time set in Variable Selector 1 Control (12.015)
8: Modulus | Input 1 |
9: Powers If Variable Selector 1 Control (12.015) = 0.02 then Output = Input2 / 100.00%
Else if Variable Selector 1 Control (12.015) = 0.03 then Output = Input3 / (100.00%)2
Else Output = Input 1


Parameter12.009  Variable Selector 1 Source 2
Short descriptionDefines the 2nd source parameter for variable selector 1
ModeRFC‑A
Minimum0.000Maximum30.999
Default0.000Units 
Type16 Bit User SaveUpdate RateDrive reset read
Display FormatStandardDecimal Places3
CodingRW, PT, BU

See Variable Selector 1 Source 1 (12.008).


Parameter12.010  Variable Selector 1 Mode
Short descriptionDefines the mode for variable selector
ModeRFC‑A
Minimum0Maximum9
Default0Units 
Type8 Bit User SaveUpdate RateBackground read
Display FormatStandardDecimal Places0
CodingRW, TE

ValueText
00
11
22
33
44
55
66
77
88
99

See Variable Selector 1 Source 1 (12.008).


Parameter12.011  Variable Selector 1 Destination
Short descriptionDefines the destination parameter for variable selector 1
ModeRFC‑A
Minimum0.000Maximum30.999
Default0.000Units 
Type16 Bit User SaveUpdate RateDrive reset read
Display FormatStandardDecimal Places3
CodingRW, DE, PT, BU

See Variable Selector 1 Source 1 (12.008).


Parameter12.012  Variable Selector 1 Output
Short descriptionDisplays the output of variable selector 1
ModeRFC‑A
Minimum-100.00Maximum100.00
Default Units%
Type16 Bit VolatileUpdate Rate4ms write
Display FormatStandardDecimal Places2
CodingRO, ND, NC, PT

See Variable Selector 1 Source 1 (12.008).


Parameter12.013  Variable Selector 1 Source 1 Scaling
Short descriptionDefines the scaling for the 1st input for variable selector 1
ModeRFC‑A
Minimum-4.000Maximum4.000
Default1.000Units 
Type16 Bit User SaveUpdate Rate4ms read
Display FormatStandardDecimal Places3
CodingRW

See Variable Selector 1 Source 1 (12.008).


Parameter12.014  Variable Selector 1 Source 2 Scaling
Short descriptionDefines the scaling for the 2nd input for variable selector 1
ModeRFC‑A
Minimum-4.000Maximum4.000
Default1.000Units 
Type16 Bit User SaveUpdate Rate4ms read
Display FormatStandardDecimal Places3
CodingRW

See Variable Selector 1 Source 1 (12.008).


Parameter12.015  Variable Selector 1 Control
Short descriptionDefines the control for variable selector 1
ModeRFC‑A
Minimum0.00Maximum100.00
Default0.00Units 
Type16 Bit User SaveUpdate Rate4ms read
Display FormatStandardDecimal Places2
CodingRW

See Variable Selector 1 Source 1 (12.008).


Parameter12.016  Variable Selector 1 Enable
Short descriptionEnables variable selector 1
ModeRFC‑A
Minimum0Maximum1
Default1Units 
Type1 Bit User SaveUpdate Rate4ms read
Display FormatStandardDecimal Places0
CodingRW, BU

See Variable Selector 1 Source 1 (12.008) for more details. Variable Selector 1 Enable (12.016) and Variable Selector 2 Enable (12.036) have a default of 1 so that if these parameters are not used the variable selectors will still function.


Parameter12.023  Threshold Detector 2 Source
Short descriptionDefines the source paramter for threshold detector 2
ModeRFC‑A
Minimum0.000Maximum30.999
Default0.000Units 
Type16 Bit User SaveUpdate RateDrive reset read
Display FormatStandardDecimal Places3
CodingRW, PT, BU

See Threshold Detector 1 Output (12.001).


Parameter12.024  Threshold Detector 2 Level
Short descriptionDefines the reference level for threshold detector 2
ModeRFC‑A
Minimum0.00Maximum100.00
Default0.00Units%
Type16 Bit User SaveUpdate Rate4ms read
Display FormatStandardDecimal Places2
CodingRW

See Threshold Detector 1 Output (12.001).


Parameter12.025  Threshold Detector 2 Hysteresis
Short descriptionDefines the hysteresis for threshold detector 2
ModeRFC‑A
Minimum0.00Maximum25.00
Default0.00Units%
Type16 Bit User SaveUpdate Rate4ms read
Display FormatStandardDecimal Places2
CodingRW

See Threshold Detector 1 Output (12.001).


Parameter12.026  Threshold Detector 2 Output Invert
Short descriptionSet to 1 to invert the output of threshold detector 2
ModeRFC‑A
Minimum0Maximum1
Default0Units 
Type1 Bit User SaveUpdate Rate4ms read
Display FormatStandardDecimal Places0
CodingRW

See Threshold Detector 1 Output (12.001).


Parameter12.027  Threshold Detector 2 Destination
Short descriptionDefines the destination parameter for threshold detector 2
ModeRFC‑A
Minimum0.000Maximum30.999
Default0.000Units 
Type16 Bit User SaveUpdate RateDrive reset read
Display FormatStandardDecimal Places3
CodingRW, DE, PT, BU

See Threshold Detector 1 Output (12.001).


Parameter12.028  Variable Selector 2 Source 1
Short descriptionDefines the 1st source parameter for variable selector 2
ModeRFC‑A
Minimum0.000Maximum30.999
Default0.000Units 
Type16 Bit User SaveUpdate RateDrive reset read
Display FormatStandardDecimal Places3
CodingRW, PT, BU

See Variable Selector 1 Source 1 (12.008).


Parameter12.029  Variable Selector 2 Source 2
Short descriptionDefines the 2nd source parameter for variable selector 2
ModeRFC‑A
Minimum0.000Maximum30.999
Default0.000Units 
Type16 Bit User SaveUpdate RateDrive reset read
Display FormatStandardDecimal Places3
CodingRW, PT, BU

See Variable Selector 1 Source 1 (12.008).


Parameter12.030  Variable Selector 2 Mode
Short descriptionDefines the mode for variable selector 2
ModeRFC‑A
Minimum0Maximum9
Default0Units 
Type8 Bit User SaveUpdate RateBackground read
Display FormatStandardDecimal Places0
CodingRW, TE

ValueText
00
11
22
33
44
55
66
77
88
99

See Variable Selector 1 Source 1 (12.008).


Parameter12.031  Variable Selector 2 Destination
Short descriptionDefines the destination parameter for variable selector 2
ModeRFC‑A
Minimum0.000Maximum30.999
Default0.000Units 
Type16 Bit User SaveUpdate RateDrive reset read
Display FormatStandardDecimal Places3
CodingRW, DE, PT, BU

See Variable Selector 1 Source 1 (12.008).


Parameter12.032  Variable Selector 2 Output
Short descriptionDisplays the output of variable selector 2
ModeRFC‑A
Minimum-100.00Maximum100.00
Default Units%
Type16 Bit VolatileUpdate Rate4ms write
Display FormatStandardDecimal Places2
CodingRO, ND, NC, PT

See Variable Selector 1 Source 1 (12.008).


Parameter12.033  Variable Selector 2 Source 1 Scaling
Short descriptionDefines the scaling for the 1st input for variable selector 2
ModeRFC‑A
Minimum-4.000Maximum4.000
Default1.000Units 
Type16 Bit User SaveUpdate Rate4ms read
Display FormatStandardDecimal Places3
CodingRW

See Variable Selector 1 Source 1 (12.008).


Parameter12.034  Variable Selector 2 Source 2 Scaling
Short descriptionDefines the scaling for the 2nd input for variable selector 2
ModeRFC‑A
Minimum-4.000Maximum4.000
Default1.000Units 
Type16 Bit User SaveUpdate Rate4ms read
Display FormatStandardDecimal Places3
CodingRW

See Variable Selector 1 Source 1 (12.008).


Parameter12.035  Variable Selector 2 Control
Short descriptionDefines the control for variable selector 2
ModeRFC‑A
Minimum0.00Maximum100.00
Default0.00Units 
Type16 Bit User SaveUpdate Rate4ms read
Display FormatStandardDecimal Places2
CodingRW, BU

See Variable Selector 1 Source 1 (12.008).


Parameter12.036  Variable Selector 2 Enable
Short descriptionEnables variable selector 2
ModeRFC‑A
Minimum0Maximum1
Default1Units 
Type1 Bit User SaveUpdate Rate4ms read
Display FormatStandardDecimal Places0
CodingRW, BU

See Variable Selector 1 Source 1 (12.008) and Variable Selector 1 Enable (12.016).


Parameter12.040  BC Brake Release
Short descriptionInidicates that the brake controller has released the mechanical brake
ModeRFC‑A
Minimum0Maximum1
Default Units 
Type1 Bit VolatileUpdate Rate4ms write
Display FormatStandardDecimal Places0
CodingRO, ND, NC, PT

The functions of BC Brake Release (12.040) and BC Enable (12.041) are the same in all drive modes and are described below. The functions of other brake controller parameters vary between drive modes, and these are described in separate sections.

The mechanical brake control function can be used to control an electro-mechanical brake via digital I/O.

BC Brake Release (12.040) = 0 when the brake should be applied and 1 when the brake should be released. Normally this should be routed to a digital output to control the mechanical brake.

If BC Enable (12.041) = 0 then the brake controller is disabled. The following parameters which are used by the brake controller to operate the drive are reset to 0 on the transition of BC Enable (12.041) from 1 to 0.

Parameter
Force Reference Direction (01.057)
Ramp Hold (02.003)

In closed loop mode, the torque produced may reduce as the frequency passes through zero. A brake controller similar to the one used for open loop mode is provided as shown in the diagram below.

The brake controller operates in the same way as the open loop mode brake controller except for the following differences.

  1. Final Demand Reference (03.001) is used instead of Output Frequency (05.001).
  2. Current detection is replaced with flux and current detection as described below.

Flux and current detection
The flux and current detection signal is made active to allow the brake to be released when the motor flux exceeds 90% of its rated level. The flux and current detection signal remains active unless the motor current falls below BC Lower Current Threshold (12.043) or the drive is disabled. BC Lower Current Threshold (12.043) is used to detect if the motor has been disconnected from the drive and should be set to a suitable level to detect this condition.


Parameter12.041  BC Enable
Short descriptionEnables the brake control function
ModeRFC‑A
Minimum0Maximum3
Default0Units 
Type8 Bit User SaveUpdate RateAction on exit from edit and reset
Display FormatStandardDecimal Places0
CodingRW, TE

ValueText
0diS
1Relay
2dig IO
3User

If BC Enable (12.041) = 0, the brake controller is disabled.

If BC Enable (12.041) = 1, the brake controller is enabled with I/O set up to control the brake via the relay output. Drive healthy is re-routed to digital I/O.

If BC Enable (12.041) = 2, the brake controller is enabled with I/O set up to control the brake via digital I/O. Drive healthy is routed to the relay output.

If BC Enable (12.041) = 3, the brake controller is enabled, but no parameters are set up to select the brake output.

Previous value of BC Enable (12.041) New value of BC Enable (12.041) Digital I/O 1 Invert (08.011) Relay 1 Invert (08.018) Digital I/O 01 mode (08.031) DO1 Control (08.091) Relay 1 Control (08.098)
Any 0 0 0 1 0 0
Any 1 0 0 1 15 18
Not 1 2 0 No change 1 18 No change
1 2 0 0 1 18 15
0 or 1 3 0 0 1 0 0
2 3 0 No change 1 0 0

Action will only occur if the drive is inactive, not in UU state and no User Actions are running. Otherwise, the parameter will return to its pre altered value on exit from edit mode.

All parameters are saved if this parameter changes.

See BC Brake Release (12.040) for full description of brake controller operation.


Parameter12.042  BC Upper Current Threshold
Short descriptionDefines the upper current threshold for the brake
ModeRFC‑A
Minimum0Maximum200
Default50Units%
Type8 Bit User SaveUpdate Rate4ms read
Display FormatStandardDecimal Places0
CodingRW, BU

See BC Brake Release (12.040).


Parameter12.043  BC Lower Current Threshold
Short descriptionDefines the lower current limit for the brake
ModeRFC‑A
Minimum0Maximum200
Default10Units%
Type8 Bit User SaveUpdate Rate4ms read
Display FormatStandardDecimal Places0
CodingRW, BU

See BC Brake Release (12.040).


Parameter12.044  BC Brake Release Frequency
Short descriptionDefines the brake release frequency
ModeRFC‑A
Minimum0.00Maximum20.00
Default1.00UnitsHz
Type16 Bit User SaveUpdate Rate4ms read
Display FormatStandardDecimal Places2
CodingRW, BU

See BC Brake Release (12.040).


Parameter12.045  BC Brake Apply Frequency
Short descriptionDefines the brake apply frequency
ModeRFC‑A
Minimum0.00Maximum20.00
Default2.00UnitsHz
Type16 Bit User SaveUpdate Rate4ms read
Display FormatStandardDecimal Places2
CodingRW, BU

See BC Brake Release (12.040).


Parameter12.046  BC Brake Release Delay
Short descriptionDefines the pre-brake release delay
ModeRFC‑A
Minimum0.0Maximum25.0
Default1.0Unitss
Type16 Bit User SaveUpdate Rate4ms read
Display FormatStandardDecimal Places1
CodingRW, BU

See BC Brake Release (12.040).


Parameter12.047  BC Post-brake Release Delay
Short descriptionDefines the post-brake release delay
ModeRFC‑A
Minimum0.0Maximum25.0
Default1.0Unitss
Type16 Bit User SaveUpdate Rate4ms read
Display FormatStandardDecimal Places1
CodingRW, BU

See BC Brake Release (12.040).


Parameter12.050  BC Initial Direction
Short descriptionDefines the initial direction of the brake
ModeRFC‑A
Minimum0Maximum2
Default0Units 
Type8 Bit User SaveUpdate Rate4ms read
Display FormatStandardDecimal Places0
CodingRW, TE

ValueText
0Ref
1For
2Rev

See BC Brake Release (12.040).


Parameter12.051  BC Brake Apply Through Zero Threshold
Short descriptionDefines if the brake is applied through zero threshold
ModeRFC‑A
Minimum0.00Maximum20.00
Default1.00UnitsHz
Type16 Bit User SaveUpdate Rate4ms read
Display FormatStandardDecimal Places2
CodingRW, BU

See BC Brake Release (12.040).