FB_ALY_AM8xxxSSD
The AM8xxxSSD enables the analysis of a motor equipped with the Smart System Diagnosis functionality. The built-in encoder records measured values from various internally installed sensors. These include the temperature and humidity in the encoder, as well as the acceleration in the X and Y directions. Various statistical parameters are calculated on the basis of these measured values and threshold monitoring is carried out to detect shocks.
Syntax
Definition:
FUNCTION_BLOCK FB_ALY_SectionTimer_1Ch
VAR_OUTPUT
ipResultMessage : Tc3_EventLogger.I_TcMessage;
bError : BOOL;
bNewResult : BOOL;
bConfigured : BOOL;
stHumidity : ST_ALY_LiveMinMaxAvg;
stTemperature : ST_ALY_LiveMinMaxAvg;
stXRmsAcceleration : ST_ALY_LiveMinMaxAvg;
stXKurtosisAcceleration : ST_ALY_LiveMinMaxAvg;
stXPeakPeakAcceleration : ST_ALY_LiveMinMaxAvg;
stYRmsAcceleration : ST_ALY_LiveMinMaxAvg;
stYKurtosisAcceleration : ST_ALY_LiveMinMaxAvg;
stYPeakPeakAcceleration : ST_ALY_LiveMinMaxAvg;
bXShockDetected : BOOL;
nCountXShocks : ULINT;
fbLastXShockEvent : FB_ALY_DateTime;
bYShockDetected : BOOL;
nCountYShocks : ULINT;
fbLastYShockEvent : FB_ALY_DateTime;
nCountTotalShocks : ULINT;
END_VAR
Outputs
Name | Type | Description |
|---|---|---|
ipResultMessage | Contains more detailed information on the current return value. For this special interface pointer, it is ensured internally that it is always valid/assigned. | |
bError | BOOL | The output is |
bNewResult | BOOL | When a new result has been calculated, the output is |
bConfigured | BOOL | Displays |
stHumidity | Humidity inside the encoder in %. | |
stTemperature | Temperature inside the encoder in °C. | |
stXRmsAcceleration | RMS of the acceleration in the X direction in g. | |
stXKurtosisAcceleration | Kurtosis of the acceleration in the X direction. | |
stXPeakPeakAcceleration | Peak-to-peak value of the acceleration in the X direction in g. | |
stYRmsAcceleration | RMS of the acceleration in the Y direction in g. | |
stYKurtosisAcceleration | Kurtosis of the acceleration in the Y direction. | |
stPeakPeakAccelerationY | Peak-to-peak value of the acceleration in the Y direction in g. | |
bXShockDetected | BOOL | TRUE if a shock is detected in the X direction. The threshold value of the RMS acceleration is monitored for this purpose. |
nCountXShocks | ULINT | Number of shocks in the X direction. |
fbLastXShockEvent | FB_ALY_DateTime | Timestamp of the last detected shock in the X direction. |
bYShockDetected | BOOL | TRUE if a shock is detected in the Y direction. The threshold value of the RMS acceleration is monitored for this purpose. |
nCountYShocks | ULINT | Number of shocks in the Y direction. |
fbLastYShockEvent | FB_ALY_DateTime | Timestamp of the last detected shock in the Y direction. |
nCountTotalShocks | ULINT | Number of shocks in the X and Y directions. |
Methods
Name | Definition location | Description |
|---|---|---|
Call() | Local | Method for calculating the outputs for a specific configuration. |
Configure() | Local | General configuration of the algorithm with its parameterized conditions. |
GetChannelOutputArray() | Local | Getting the result array for a specific channel without adding new values. |
Reset() | Local | Resets all internal states or the calculations performed so far. |
SetChannelValue() | Local | Method for passing values to the algorithm. |
Sample
VAR
fbAM8SSD : FB_ALY_AM8xxxSSD;
fbSystemTime : FB_ALY_GetSystemTime;
// Config
bConfigure : BOOL := TRUE;
nNumSectionsHumidity : UDINT := 50;
nNumSectionsTemperature : UDINT := 50;
nNumBinsRmsAcceleration : UDINT := 30;
fThresholdRmsAcceleration : LREAL := 1.5;
// Inputs
nUpdateCounter AT%I* : ULINT;
dataSensor0 AT%I* : ULINT;
dataSensor1 AT%I* : ULINT;
dataSensor2 AT%I* : ULINT;
dataSensor3 AT%I* : ULINT;
// Results
aTimespansHumidity : ARRAY [1..50] OF LINT;
aTimespansTemperature : ARRAY [1..50] OF LINT;
aHistogramRmsAccelerationX : ARRAY [0..31] OF ULINT;
aHistogramRmsAccelerationY : ARRAY [0..31] OF ULINT;
END_VAR// Get current system time
fbSystemTime.Call();
// Configure algorithm
IF bConfigure THEN
bConfigure := FALSE;
fbAM8SSD.Configure(nNumSectionsHumidity, nNumSectionsTemperature, nNumSectionsRmsAcceleration, nNumBinsRmsAcceleration, fThresholdRmsAcceleration);
END_IF
// Call algorithm
fbAM8SSD.SetChannelValue(1, nUpdateCounter);
fbAM8SSD.SetChannelValue(2, dataSensor0);
fbAM8SSD.SetChannelValue(3, dataSensor1);
fbAM8SSD.SetChannelValue(4, dataSensor2);
fbAM8SSD.SetChannelValue(5, dataSensor3);
fbAM8SSD.Call(tTimestamp := fbSystemTime.tSystemTime);
fbAM8SSD.GetChannelOutputArray(1, ADR(aTimespansHumidity) , SIZEOF(aTimespansHumidity));
fbAM8SSD.GetChannelOutputArray(2, ADR(aTimespansTemperature) , SIZEOF(aTimespansTemperature));
fbAM8SSD.GetChannelOutputArray(3, ADR(aHistogramRmsAccelerationX) , SIZEOF(aHistogramRmsAccelerationX));
fbAM8SSD.GetChannelOutputArray(4, ADR(aHistogramRmsAccelerationY) , SIZEOF(aHistogramRmsAccelerationY));SIZEOF(aTimespansOut));Preparation
In order for the sensor values to be available for analysis, they must be added to the process image of the drive. This process is described below.
- 1. Create a TwinCAT project.
- 2. Scan the I/Os of the TwinCAT project.
- 3. Add a Drive Manager project to the solution.
- 4. Select the corresponding channel of the drive to which the motor with the B/SSD-capable encoder is connected.
- 5. Select the Advanced tab.
- 6. Further process data can be added in the Process data subitem.
- 7. Add the following process data:
IntSHub: Update counter
IntSHub: Data Sensor 0
IntSHub: Data Sensor 1
IntSHub: Data Sensor 2
IntSHub: Data Sensor 3
- Once the process data has been added, it is displayed in the I/O node and is available for analysis.
Requirements
Development environment | Target platform | Plc libraries to include |
|---|---|---|
TwinCAT v3.1.4024.0 | PC or CX (x64, x86) | Tc3_Analytics |