Difference between revisions of "MC-Basic:COMMON SHARED ... AS PLS"

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{{Languages}}
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{{Languages|MC-Basic:COMMON_SHARED_..._AS_PLS}}
 
{{MC-Basic
 
{{MC-Basic
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|SHORT FORM=
 
  
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|DESCRIPTION=
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<span style="color: red">Updated 2018-10</span>
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This command declares a programmable limit switch (PLS) variable.
  
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|SYNTAX=
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The declaration specifies the name of the axis and the output associated with the PLS.
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COMMON SHARED ''<pls>''As Pls ''<''axis''> <output> {HWAssistance = TRUE/FALSE }''
 
  
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|AVAILABILITY=
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The PLS output may be a digital output (SYSTEM.DOUT.x) or a virtual output (SYSTEM.VOUT.x).
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<font color="red">
 
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HWAssistance: Since Version 4.1.11 / 4.2.16  firmware with 8.7.1 Altera version
 
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</font>
 
  
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|DESCRIPTION=
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After this command is issued, the PLS exists but is disabled. The PLS property <pls>.PLSENABLE is used to enable the PLS.
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This command declares a programmable limit switch (PLS) variable. In the declaration, the name of the axis and the output associated with the PLS are specified. The PLS output pattern is generated for the position of that axis. The output associated with a PLS may be a digital output (specified using SYSTEM.DOUT.''x'') or a virtual output (specified using SYSTEM.VOUT.''x'').
 
  
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After this command is processed, the following default PLS properties are in effect:
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After PLS is declared, the following default PLS properties are in effect:
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*The initial output polarity is 1.<br>
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* The initial output polarity is 0.
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*The repetition interval is set to 0.<br>
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* The repetition interval is 0.
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*The hysteresis is set to 0.<br>
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* The hysteresis is 0.
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*A single PLS position exists at 0
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* A single PLS position set as 0.
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These properties can be set explicitly only when the PLS is disabled.
  
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The hardware assisted PLS is proposed in order to overcome a limitation of scan time. Having current position, speed and acceleration software can predict (extrapolate) exact time when axis will reach desired position. The output operation must be performed at the extrapolated point of time.
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|SYNTAX=
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COMMON SHARED <''pls''> As PLS <''axis name''> <''output''> {HWAssistance = 1/0 }
  
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These properties may be set explicitly when the PLS is disabled. The PLS exists, but is disabled after it is declared. The PLS property <''pls''>.PLSENABLE is used to enable the PLS.
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|AVAILABILITY=
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Version 4.1.11 and later
  
 
|TYPE=
 
|TYPE=
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''<pls>'':string<br>
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<''pls''>: string<br>
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<''axis''>: string
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<''axis name''>: string
  
 
|RANGE=
 
|RANGE=
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<''axis''>: a valid axis name<br>
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<''axis name''>: a valid axis name<br>
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''<output>'': the name of a system output. System outputs are specified by<br>
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<''output''>: the name of a system output. System outputs are specified by<br>
 
::System.DOut.''x'', for digital outputs, or<br>
 
::System.DOut.''x'', for digital outputs, or<br>
 
::System.VOut.''x'', for virtual outputs.
 
::System.VOut.''x'', for virtual outputs.
  
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The hardware assisted PLS works with System.DOut from 1 to 8
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<HWAssistance>: 1 activates the PLS high accuracy mode
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''<HWAssistance>'': TRUE  - starts the hardware assisted PLS  mode
 
  
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FALSE
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The value ''x'' identifies the specific output to be used. It may be explicitly given or it may be an expression. The expression must evaluate to an integer ranging from 1 to 20 for digital outputs or from 1 to 32 for virtual outputs.
  
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The value ''x''identifies the specific output to be used. It may be explicitly given or it may be an expression. The expression must evaluate to an integer ranging from 1 to 20 for digital outputs or from 1 to 32 for virtual outputs.
 
  
 
|UNITS=
 
|UNITS=
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|SCOPE=
 
|SCOPE=
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Configuration or Terminal .
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Configuration or Terminal
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In version 4.5.17 and later, the global (common shared) declaration can also be issued from library or task contexts. In those contexts all three parameters of PLS (axis name, system output and HWassistance flag) can be reassigned while reloading the declaring task or library.
  
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Since Version 4.5.17 the global (common shared) declaration is also possible from the Library or Task contexts. In those contexts all three parameters of PLS (axis name, system output and HWassistance flag) can be reassigned during the reloading the declaring task or library.
 
  
 
|LIMITATIONS=
 
|LIMITATIONS=
 
Write only
 
Write only
  
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HWAssistance feature works for Digital Logic Pentium III CPU  with 8.7.1 Altera version  only !
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PLS high accuracy (HWAssistance) is limited to System.DOut from 1 to 8.
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HWAssistance requires Digital Logic Pentium III CPU with Altera version 8.7.1  
  
  
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Common Shared Pls1 as PLS x_axis SYSTEM.Dout.4
 
Common Shared Pls1 as PLS x_axis SYSTEM.Dout.4
  
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Common Shared Pls2 as PLS x_axis SYS.Dout.8 HWAssistance = TRUE
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Common Shared Pls2 as PLS x_axis SYS.Dout.8 HWAssistance = 1
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Common Shared Pls3 as PLS x_axis SYS.Dout.3 HWAssistance = FALSE
 
  
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Common Shared Pls3 as PLS x_axis SYS.Dout.3 HWAssistance = 0
  
  
 
|SEE ALSO=
 
|SEE ALSO=
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* [[MC-Basic:pls.PLSAXISNAME|pls.PLSAXISNAME]]
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* [[MC-Basic:CREATEPLSDATA|CREATEDATA]]
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* [[MC-Basic:DELETEPLS|DELETEPLS]]
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* [[MC-Basic:PLSLIST|PLSLIST]]
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* [[MC-Basic:WITHPLS|WITHPLS]]
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* [[MC-Basic:pls.HWASSISTANCE|pls.HWASSISTANCE]]
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* [[MC-Basic:pls.HWIOtime|pls.HWIOTIME]]
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* [[MC-Basic:pls.PLSdelaytime|pls.DELAYTIME]]
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* [[MC-Basic:pls.PLSEMENTNAME|pls.PLSEMENTNAME]] / [[MC-Basic:pls.PLSAXISNAME|pls.PLSAXISNAME]]
 
* [[MC-Basic:pls.PLSENABLE|pls.PLSENABLE]]
 
* [[MC-Basic:pls.PLSENABLE|pls.PLSENABLE]]
 
* [[MC-Basic:pls.PLSHYSTERESIS|pls.PLSHYSTERESIS]]
 
* [[MC-Basic:pls.PLSHYSTERESIS|pls.PLSHYSTERESIS]]
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* [[MC-Basic:pls.PLSPOLARITY|pls.PLSPOLARITY]]
 
* [[MC-Basic:pls.PLSPOLARITY|pls.PLSPOLARITY]]
 
* [[MC-Basic:pls.PLSPOSITION|pls.PLSPOSITION]]
 
* [[MC-Basic:pls.PLSPOSITION|pls.PLSPOSITION]]
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* [[MC-Basic:pls.PLSPropagationDelay|pls.PLSPropagationDelay]]
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* [[MC-Basic:pls.PLSPropagationDisableDelay|pls.PLSPropagationDisableDelay]]
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* [[MC-Basic:pls.PLSPropagationEnableDelay|pls.PLSPropagationEnableDelay]]
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* [[MC-Basic:pls.PLSRELATEDTO|pls.PLSRELATEDTO]]
 
* [[MC-Basic:pls.PLSREPEAT|pls.PLSREPEAT]]
 
* [[MC-Basic:pls.PLSREPEAT|pls.PLSREPEAT]]
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* [[MC-Basic:PLSLIST|PLSLIST]]
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* [[MC-Basic:element.PLSSOURCE|element.PLSSOURCE]]
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* [[MC-Basic:pls.HWASSISTANCE|pls.HWASSISTANCE]]
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[[Category:MC-Basic:Declarations|COMMON SHARED ... AS PLS]]
 
[[Category:MC-Basic:Declarations|COMMON SHARED ... AS PLS]]
 
}}
 
}}

Latest revision as of 14:58, 8 October 2018

Language: English  • 中文（简体）‎

Updated 2018-10

This command declares a programmable limit switch (PLS) variable.

The declaration specifies the name of the axis and the output associated with the PLS.

The PLS output may be a digital output (SYSTEM.DOUT.x) or a virtual output (SYSTEM.VOUT.x).

After this command is issued, the PLS exists but is disabled. The PLS property <pls>.PLSENABLE is used to enable the PLS.

After PLS is declared, the following default PLS properties are in effect:

  • The initial output polarity is 0.
  • The repetition interval is 0.
  • The hysteresis is 0.
  • A single PLS position set as 0.

These properties can be set explicitly only when the PLS is disabled.

Syntax

COMMON SHARED <pls> As PLS <axis name> <output> {HWAssistance = 1/0 }

Availability

Version 4.1.11 and later

Type

<pls>: string
<axis name>: string

Range

<axis name>: a valid axis name
<output>: the name of a system output. System outputs are specified by

System.DOut.x, for digital outputs, or
System.VOut.x, for virtual outputs.

<HWAssistance>: 1 activates the PLS high accuracy mode

The value x identifies the specific output to be used. It may be explicitly given or it may be an expression. The expression must evaluate to an integer ranging from 1 to 20 for digital outputs or from 1 to 32 for virtual outputs.

Scope

Configuration or Terminal

In version 4.5.17 and later, the global (common shared) declaration can also be issued from library or task contexts. In those contexts all three parameters of PLS (axis name, system output and HWassistance flag) can be reassigned while reloading the declaring task or library.

Limitations

Write only

PLS high accuracy (HWAssistance) is limited to System.DOut from 1 to 8.

HWAssistance requires Digital Logic Pentium III CPU with Altera version 8.7.1

Examples

Common Shared Pls1 as PLS x_axis SYSTEM.Dout.4

Common Shared Pls2 as PLS x_axis SYS.Dout.8 HWAssistance = 1

Common Shared Pls3 as PLS x_axis SYS.Dout.3 HWAssistance = 0

See Also

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