Configurable AD Convertor: Difference between revisions

From RadiWiki
Jump to navigation Jump to search
 
(5 intermediate revisions by the same user not shown)
Line 11: Line 11:


[[Image:Configurable AD Converter Configuration Window.png]]
[[Image:Configurable AD Converter Configuration Window.png]]
== Communication ==
Multiple communication types can be selected for the configurable AD convertor. Depending on the connection that is used, select the correct {{ScreenElement|Communication Stream}}, and configure the parameters correspondingly.</br>
Note that when the selected communication type does not have the option to change the termination character, it will be expected that a new line feed is send by the connected device apppended to each message.
[[File:ConfigureCommunication.png]]


== Initialisation and Check ==
== Initialisation and Check ==
The Configurable AD Convertor device driver has several boxes, in which the remote programming commands can be specified, which should be transmitted to the measurement device on defined moments.
{{ScreenElementDescriptionStart}}
{{ScreenElementDescriptionStart}}
{{ScreenElementDescription|Reset|The reset code that needs to be send to device. When left blank, no command will be send.}}
{{ScreenElementDescription|Reset|The reset code that needs to be transmitted to device. When left blank, no command will be transmitted.}}
{{ScreenElementDescription|Init|The command that is send to initialize the configured device. When left blank no command will be send.}}
{{ScreenElementDescription|Init|The command that is transmitted to initialise the configured device. When left blank, no command will be transmitted.}}
{{ScreenElementDescription|Get Id|The command that is send to retrieve the ID of the device. This is used to check if the device is connected. A commonly used [[SCPI]] command is: *IDN?. When left blank, no command will be send.}}
{{ScreenElementDescription|Get ID|The query-command that is transmitted to retrieve the ID of the device. This is used to check if the device is connected. A commonly used [[SCPI]] command is: '*IDN?'. When left blank, no command will be transmitted.}}
{{ScreenElementDescription|Returned ID|The identifier is used to check if the correct device driver is selected and the device is connected. Leaving this blank, will skip the device check.}}
{{ScreenElementDescription|Returned ID|The expected response of the device on the {{ScreenElement|Get ID}} query. The text that is specified will be searched in the real response on {{ScreenElement|Get ID}} query. If the specified text can be found in the response, the check for the connection is successful, otherwise it is reported that the measurement device is not connected. Leaving this blank, will skip the check if the measurement device is connected, and it is always assumed that the device is connected.}}
{{ScreenElementDescription|Deinit|Specifies the command that is send when the device is no longer controlled. This can for example be used to put the measurement device is an intrinsic safe state. Leaving this blank, will keep the device in its last state after controlling it.}}
{{ScreenElementDescription|Deinit|Specifies the command that is transmitted when the device will not be controlled anymore.This can for example be used to put the measurement device in an intrinsic safe state. When left blank, no command will be transmitted.}}
{{ScreenElementDescription|Wait for Completion after sending command|The checkmark can be enabled so {{RadiMation}} will wait for all the commands to complete, before it continues. This is done by sending [[SCPI]] command *OPC? to the device.}}
{{ScreenElementDescription|Wait for Completion after sending command|If the checkbox is ticked, {{RadiMation}} will wait for all the commands to complete, before it continues. This is achieved by also transmitting the [[SCPI]] query-command '*OPC?' to the device, and waiting for the response.}}
{{ScreenElementDescriptionEnd}}
{{ScreenElementDescriptionEnd}}


== Channels ==
== Channels ==
AD convertors can have multiple channels on which AD values could be read. The [[Configurable AD Convertor]] device driver is able to retrieve up to 40 measurement values from the measurement device.  
AD convertors can have multiple channels from which values can be read. The [[Configurable AD Convertor]] device driver is able to retrieve the values from up to 50 different channels from the measurement device.  
For each AD channel, individual commands can be set, specific for the values that should be retrieved.
For each AD channel, an individual query-command can be specified, specific for the measurement value that should be retrieved.


==== Trigger and Reading ====
The configuration of a single channel can be configured on one of the specific {{ScreenElement|Channel <nr>}} tabs.
{{ScreenElementDescriptionStart}}
{{ScreenElementDescriptionStart}}
{{ScreenElementDescription|Trigger|A trigger command can be specified to request a measurement from the device. A commonly used [[SCPI]] command is: *TRG. When left blank, no command will be send.}}
{{ScreenElementDescription|Trigger|The trigger query-command can be specified to trigger and request a new measurement value from the device. A commonly used [[SCPI]] query-command is: 'READ?'.}}
 
{{ScreenElementDescription|Timeout ms|The timeout (specified in milliseconds) that should be used to read the response from the device. If no valid response is received within the timeout it is assumed that no value is read.}}
{{ScreenElementDescription|Read Back|Different measurement devices will return different messages that contain the measurement value. The configurable AD convertor only needs the numeric value of the measurement device response. The text that is specified in the {{ScreenElement|Read Back}} box, is used as a [[regular expressions]] to determine the returned value.
{{ScreenElementDescription|Read Back|Different measurement devices will return the measured value in different formatting. The configurable AD convertor is able to determine the numeric value of the measurement device response by using [[regular expressions]]. The text in the {{ScreenElement|Read Back}} box, is used as the [[regular expressions]] to determine the numeric value in the response of the measurement device.
A good regular expression for finding the first number in scientific notation in a text is:
The regular expression for finding the first numeric value (including fractional and scientific notation) in a text is:


'''([+-]?[0-9]*\.?[0-9]+([eE][+-]?[0-9]+)?)'''
'''([+-]?[0-9]*\.?[0-9]+([eE][+-]?[0-9]+)?)'''


For more possibilities see the example section.
The part of the regular expression that is contained in the round brackets, is retrieved as the measurement value and converted to a numeric value.
For more possibilities see the [[#Read Back examples|Read Back examples]] section.
}}
}}
{{ScreenElementDescription|Validate Expression|Shows a window where the expected output of the measurement device and a regular expression can be typed. The result of the interpretion will then automatically be shown. This window can be used to test the regular expression, to determine if the expected response results in the desired value.}}
{{ScreenElementDescription|Validate Expression|Shows a small window where the expected response of the measurement device and a regular expression can be typed. The specified regular expression will be used to interpret the specified result, and the result will be shown. This window can be used to test the regular expression, to determine if the expected response results in the desired value.}}
{{ScreenElementDescriptionEnd}}
{{ScreenElementDescriptionEnd}}


==== Minimum and maximum value ====
The minimum and maximum measurable value of the measurement device can be specified to correctly scale the measured value. This will also be used to re-calculate the retrieved measurement value to another value with another unit.
The minimum and maximum must be set to calculate the raw AD convertor value to a digital value with a specific type.
 
{{ScreenElementDescriptionStart}}
{{ScreenElementDescriptionStart}}
{{ScreenElementDescription|Minimum value|The lowest value that can be measured with this device. The value must be the same as filled in the [[EUT]] window.}}
{{ScreenElementDescription|Minimum value|The lowest value of the channel that can be measured with the controlled measurement device. The value must be the same as filled in the [[EUT]] window. It normally is the best to configure this value to be 0.}}
{{ScreenElementDescription|Maximum value|The highest value that can be measured with this device. The value must be the same as filled in the [[EUT]] window.}}
{{ScreenElementDescription|Maximum value|The highest value of the channel that can be measured with the controlled measurement device. The value must be the same as filled in the [[EUT]] window. It normally is the best to configure this value to be 1.}}
{{ScreenElementDescriptionEnd}}
{{ScreenElementDescriptionEnd}}
With minimum set to 0 and maximum set to 1, the raw value won't be converted, but instead directly used as it is included in the response.


== Read Back examples ==
== Read Back examples ==
Line 67: Line 58:
|-
|-
| U_L_N 325
| U_L_N 325
| (-?[0-9.,Ee-]+)
| (-?[0-9.,Ee+-]+)
| 325
| 325
| Takes the first number.
| Takes the first number.
|-
|-
| I_L1;12.34  
| I_L1;12.34  
| ;(-?[0-9.,Ee-]+)
| ;(-?[0-9.,Ee+-]+)
| 12.34
| 12.34
| Takes the first number after ";".
| Takes the first number after ";".
|-
|-
| THD_U_L1;;14,5
| THD_U_L1;;14,5
| ;;(-?[0-9.,Ee-]+)
| ;;(-?[0-9.,Ee+-]+)
| 14.5
| 14.5
| Takes the first number after ";;".
| Takes the first number after ";;".
|-
|-
| AC_FREQ;Channel1;1.23E3
| AC_FREQ;Channel1;1.23E3
| ;.*;(-?[0-9.,Ee-]+)
| ;.*;(-?[0-9.,Ee+-]+)
| 1230
| 1230
| Takes the first number after the appearance of a second ";".
| Takes the first number after the appearance of a second ";".
Line 91: Line 82:
[[File:ValidateExpressionTool.png]]
[[File:ValidateExpressionTool.png]]


In the {{ScreenElement|Regular Expression Tester}}, the following fields are available to verify the regular expression:
{{ScreenElementDescriptionStart}}
{{ScreenElementDescriptionStart}}
{{ScreenElementDescription|Input|Any text that is expected to be returned by the device.}}
{{ScreenElementDescription|Input|Any text that is expected to be returned by the device.}}
Line 96: Line 88:
{{ScreenElementDescription|Result|The numerical value that is determined by the device driver using the {{ScreenElement|Regular Expression}} on the {{ScreenElement|Input}}.}}
{{ScreenElementDescription|Result|The numerical value that is determined by the device driver using the {{ScreenElement|Regular Expression}} on the {{ScreenElement|Input}}.}}
{{ScreenElementDescriptionEnd}}
{{ScreenElementDescriptionEnd}}
== Communication ==
The Configurable AD Convertor supports several communication types, which can be used to communicate with the measurement device. The {{ScreenElement|Communication}} button can be used to open the configuration dialog to specify the actual details of the medium to use for the communication. Depending on the connection that is used, select the correct {{ScreenElement|Communication Stream}}, and configure the parameters correspondingly to communication settings that are used by device. Different {{ScreenElement|Communication Stream}}s are available, which are described in more detail in the [[Chapter_15#Communication_settings|Communication settings]] section of [[Chapter 15]].
[[File:ConfigureCommunication.png]]

Latest revision as of 12:32, 31 January 2023


The Configurable AD Convertor device driver is a AD Converter which is supported by RadiMation®.   It can be used to control other measurement equipment, for which no RadiMation device driver is available yet. The Configurable AD Convertor allows to retrieve a measurement value from the measurement equipment, where the measured value can then be used in RadiMation as an EUT Monitoring input. These values can thus be measured and shown in graphs during immunity tests.

Configurable AD Converter Configuration Window.png

Initialisation and Check[edit]

The Configurable AD Convertor device driver has several boxes, in which the remote programming commands can be specified, which should be transmitted to the measurement device on defined moments.

ScreenElementDescription.svg Reset The reset code that needs to be transmitted to device. When left blank, no command will be transmitted.
ScreenElementDescription.svg Init The command that is transmitted to initialise the configured device. When left blank, no command will be transmitted.
ScreenElementDescription.svg Get ID The query-command that is transmitted to retrieve the ID of the device. This is used to check if the device is connected. A commonly used SCPI command is: '*IDN?'. When left blank, no command will be transmitted.
ScreenElementDescription.svg Returned ID The expected response of the device on the Get ID query. The text that is specified will be searched in the real response on Get ID query. If the specified text can be found in the response, the check for the connection is successful, otherwise it is reported that the measurement device is not connected. Leaving this blank, will skip the check if the measurement device is connected, and it is always assumed that the device is connected.
ScreenElementDescription.svg Deinit Specifies the command that is transmitted when the device will not be controlled anymore.This can for example be used to put the measurement device in an intrinsic safe state. When left blank, no command will be transmitted.
ScreenElementDescription.svg Wait for Completion after sending command If the checkbox is ticked, RadiMation® will wait for all the commands to complete, before it continues. This is achieved by also transmitting the SCPI query-command '*OPC?' to the device, and waiting for the response.


Channels[edit]

AD convertors can have multiple channels from which values can be read. The Configurable AD Convertor device driver is able to retrieve the values from up to 50 different channels from the measurement device. For each AD channel, an individual query-command can be specified, specific for the measurement value that should be retrieved.

The configuration of a single channel can be configured on one of the specific Channel <nr> tabs.

ScreenElementDescription.svg Trigger The trigger query-command can be specified to trigger and request a new measurement value from the device. A commonly used SCPI query-command is: 'READ?'.
ScreenElementDescription.svg Timeout ms The timeout (specified in milliseconds) that should be used to read the response from the device. If no valid response is received within the timeout it is assumed that no value is read.
ScreenElementDescription.svg Read Back Different measurement devices will return the measured value in different formatting. The configurable AD convertor is able to determine the numeric value of the measurement device response by using regular expressions. The text in the Read Back box, is used as the regular expressions to determine the numeric value in the response of the measurement device.

The regular expression for finding the first numeric value (including fractional and scientific notation) in a text is: 

([+-]?[0-9]*\.?[0-9]+([eE][+-]?[0-9]+)?)

The part of the regular expression that is contained in the round brackets, is retrieved as the measurement value and converted to a numeric value. For more possibilities see the Read Back examples section.

ScreenElementDescription.svg Validate Expression Shows a small window where the expected response of the measurement device and a regular expression can be typed. The specified regular expression will be used to interpret the specified result, and the result will be shown. This window can be used to test the regular expression, to determine if the expected response results in the desired value.


The minimum and maximum measurable value of the measurement device can be specified to correctly scale the measured value. This will also be used to re-calculate the retrieved measurement value to another value with another unit.

ScreenElementDescription.svg Minimum value The lowest value of the channel that can be measured with the controlled measurement device. The value must be the same as filled in the EUT window. It normally is the best to configure this value to be 0.
ScreenElementDescription.svg Maximum value The highest value of the channel that can be measured with the controlled measurement device. The value must be the same as filled in the EUT window. It normally is the best to configure this value to be 1.


Read Back examples[edit]

Some examples for interpreting a response are:

Received information Regular expression Determined measurement value Note
U_L_N 325 (-?[0-9.,Ee+-]+) 325 Takes the first number.
I_L1;12.34 ;(-?[0-9.,Ee+-]+) 12.34 Takes the first number after ";".
THD_U_L1;;14,5 ;;(-?[0-9.,Ee+-]+) 14.5 Takes the first number after ";;".
AC_FREQ;Channel1;1.23E3 ;.*;(-?[0-9.,Ee+-]+) 1230 Takes the first number after the appearance of a second ";".

The correctness of the regular expression can be tested, verified and improved by using the Validate Expression tool within the configurable device driver.

ValidateExpressionTool.png

In the Regular Expression Tester, the following fields are available to verify the regular expression:

ScreenElementDescription.svg Input Any text that is expected to be returned by the device.
ScreenElementDescription.svg Regular Expression The Regular expression that is being tested. This regular expression will be used to use the text from Input and convert it into a numerical value.
ScreenElementDescription.svg Result The numerical value that is determined by the device driver using the Regular Expression on the Input.


Communication[edit]

The Configurable AD Convertor supports several communication types, which can be used to communicate with the measurement device. The Communication button can be used to open the configuration dialog to specify the actual details of the medium to use for the communication. Depending on the connection that is used, select the correct Communication Stream, and configure the parameters correspondingly to communication settings that are used by device. Different Communication Streams are available, which are described in more detail in the Communication settings section of Chapter 15.

ConfigureCommunication.png

Analog to Digital

The ability of an EUT to be immune to incoming electromagnetic interference. This is equivalent to the term susceptibility that is used by some standards.

Retrieved from "https://wiki.radimation.com/wiki/index.php?title=Configurable_AD_Convertor&oldid=97437"