motion/ecmc_plugin_fft
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Add description of RM_LIN conf.

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This commit is contained in:
Anders Sandström
2020-04-24 15:40:20 +02:00
parent 375e5e7b21
commit 07385b261a
1 changed files with 21 additions and 11 deletions
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32
README.md
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@@ -33,7 +33,7 @@ https://github.com/icshwi/ecmccfg/blob/master/scripts/loadPlugin.cmd
Example:
```
${SCRIPTEXEC} ${ecmccfg_DIR}loadPlugin.cmd, "PLUGIN_ID=0,FILE=libecmcPlugin_FFT.so,CONFIG='DBG_PRINT=1;SOURCE=ax1.actpos;', REPORT=1
${SCRIPTEXEC} ${ecmccfg_DIR}loadPlugin.cmd, "PLUGIN_ID=0,FILE=libecmcPlugin_FFT.so,CONFIG='DBG_PRINT=1;SOURCE=ax1.actpos;RM_LIN=1;', REPORT=1
dbLoadRecords(ecmcPluginFFT.template,"P=$(IOC):,INDEX=0, NELM=${FFT_NELM}")
```
This plugin supports multiple loading. For each load of the plugin a new FFT object will be created. In order to access these plugins, from plc:s or EPICS records, they can be accessed by an index. The first FFT plugin will have index 0. The next loaded FFT plugin will have index 1...
@@ -54,16 +54,16 @@ The different available configuration settings:
Example configuration string:
```
"SOURCE=ax1.actpos;MODE=TRIGG;DBG_PRINT=1;ENABLE=1;"
"SOURCE=ax1.poserr;MODE=TRIGG;DBG_PRINT=1;ENABLE=1;"
```
#### SOURCE (mandatory)
The data source is defined by setting the SOURCE option in the plugin configuration string.
This configuration is mandatory.
Example: Axis 1 actpos
Example: Axis 1 actpos (See RM_LIN config below)
```
"DBG_PRINT=1;SOURCE=ax1.actpos;"
"DBG_PRINT=1;SOURCE=ax1.actpos;RM_LIN=1;"
```
Example: Ethercat slave 1 analog input ch1
@@ -75,7 +75,7 @@ Enable/disable printouts from plugin can be made bu setting the "DBG_PRINT" opti
Exmaple: Disable
```
"DBG_PRINT=0;SOURCE=ax1.actpos;"
"DBG_PRINT=0;SOURCE=ax1.poserr;"
```
#### NFFT (default: 4096)
@@ -85,28 +85,38 @@ Note: Must be a n² number..
Exmaple: 1024
```
"NFFT=1024;DBG_PRINT=0;SOURCE=ax1.actpos;"
"NFFT=1024;DBG_PRINT=0;SOURCE=ax1.poserr;"
```
#### APPLY_SCALE (default disabled)
Apply scaling in order to get correct amplitude of fft. Disabled as default (lower cpu usage).
Exmaple: Enable
```
"APPLY_SCALE=1;NFFT=1024;DBG_PRINT=0;SOURCE=ax1.actpos;"
"APPLY_SCALE=1;NFFT=1024;DBG_PRINT=0;SOURCE=ax1.poserr;"
```
### RM_DC
Remove DC of input signal. Default is disabled.
Exmaple: Remove DC offset
```
"RM_DC=1;APPLY_SCALE=1;NFFT=1024;DBG_PRINT=0;SOURCE=ax1.actpos;"
"RM_DC=1;APPLY_SCALE=1;NFFT=1024;DBG_PRINT=0;SOURCE=ax1.poserr;"
```
### RM_LIN
Remove linear component of input signal. Default is disabled.
The linear component is calculated by least square method.
Could be usefull for values that increase, like actual position.
Exmaple: Remove linear component
```
"RM_LIN=1;APPLY_SCALE=1;NFFT=1024;DBG_PRINT=0;SOURCE=ax1.poserr;"
```
#### ENABLE (default: disabled)
Enable data acq. and FFT calcs. The default settings is disabled so needs to be enabled from plc or over asyn in order to start calculations.
Exmaple: Enable at startup by config
```
"ENABLE=1;RM_DC=1;APPLY_SCALE=1;NFFT=1024;DBG_PRINT=0;SOURCE=ax1.actpos;"
"ENABLE=1;RM_DC=1;APPLY_SCALE=1;NFFT=1024;DBG_PRINT=0;SOURCE=ax1.poserr;"
```
Exmaple: Enable FFT index 0 from EPICS:
```
@@ -143,7 +153,7 @@ Triggered mode:
Exmaple: Mode triggered
```
"MODE=TRIGG;ENABLE=1;RM_DC=1;APPLY_SCALE=1;NFFT=1024;DBG_PRINT=0;SOURCE=ax1.actpos;"
"MODE=TRIGG;ENABLE=1;RM_DC=1;APPLY_SCALE=1;NFFT=1024;DBG_PRINT=0;SOURCE=ax1.poserr;"
```
Exmaple: Mode from EPICS record
```
@@ -160,7 +170,7 @@ Note: only a lower and "integer" division of sample rate can be defined.
Exmaple: Rate = 100Hz
```
RATE=100;MODE=TRIGG;ENABLE=1;RM_DC=1;APPLY_SCALE=1;NFFT=1024;DBG_PRINT=0;SOURCE=ax1.actpos;"
RATE=100;MODE=TRIGG;ENABLE=1;RM_DC=1;APPLY_SCALE=1;NFFT=1024;DBG_PRINT=0;SOURCE=ax1.poserr;"
```
## EPICS records
Each FFT plugin object will create a new asynportdriver-port named "PLUGIN.FFT<index>" (index is explaine above).