Python Safe Globals now have more reliable triggering of OnChange call. Added "Onchange" object to accessible runtime variables that let user python code see count of changes and first and last values.
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<fileHeader companyName="Beremiz" productName="Additional Function Blocks Library" productVersion="1.0" creationDateTime="2013-09-09T09:56:11"/>
<contentHeader name="Standard Funtion Blocks" author="Laurent Bessard" modificationDateTime="2013-09-10T22:45:31">
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<pou name="RTC" pouType="functionBlock">
<interface>
<inputVars>
<variable name="IN">
<type>
<BOOL/>
</type>
<documentation>
<xhtml:p><![CDATA[0 - current time, 1 - load time from PDT]]></xhtml:p>
</documentation>
</variable>
<variable name="PDT">
<type>
<DT/>
</type>
<documentation>
<xhtml:p><![CDATA[Preset datetime]]></xhtml:p>
</documentation>
</variable>
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<variable name="Q">
<type>
<BOOL/>
</type>
<initialValue>
<simpleValue value="FALSE"/>
</initialValue>
<documentation>
<xhtml:p><![CDATA[Copy of IN]]></xhtml:p>
</documentation>
</variable>
<variable name="CDT">
<type>
<DT/>
</type>
<documentation>
<xhtml:p><![CDATA[Datetime, current or relative to PDT]]></xhtml:p>
</documentation>
</variable>
</outputVars>
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<variable name="PREV_IN">
<type>
<BOOL/>
</type>
<initialValue>
<simpleValue value="FALSE"/>
</initialValue>
</variable>
<variable name="OFFSET">
<type>
<TIME/>
</type>
</variable>
<variable name="CURRENT_TIME">
<type>
<DT/>
</type>
</variable>
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</interface>
<body>
<ST>
<xhtml:p><![CDATA[{__SET_VAR(data__->,CURRENT_TIME,,__CURRENT_TIME)}
IF IN
THEN
IF NOT PREV_IN
THEN
OFFSET := PDT - CURRENT_TIME;
END_IF;
(* PDT + time since PDT was loaded *)
CDT := CURRENT_TIME + OFFSET;
ELSE
CDT := CURRENT_TIME;
END_IF;
Q := IN;
PREV_IN := IN;
]]></xhtml:p>
</ST>
</body>
<documentation>
<xhtml:p><![CDATA[The real time clock has many uses including time stamping, setting dates and times of day in batch reports, in alarm messages and so on.]]></xhtml:p>
</documentation>
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<interface>
<inputVars>
<variable name="RUN">
<type>
<BOOL/>
</type>
<documentation>
<xhtml:p><![CDATA[1 = integrate, 0 = hold]]></xhtml:p>
</documentation>
</variable>
<variable name="R1">
<type>
<BOOL/>
</type>
<documentation>
<xhtml:p><![CDATA[Overriding reset]]></xhtml:p>
</documentation>
</variable>
<variable name="XIN">
<type>
<REAL/>
</type>
<documentation>
<xhtml:p><![CDATA[Input variable]]></xhtml:p>
</documentation>
</variable>
<variable name="X0">
<type>
<REAL/>
</type>
<documentation>
<xhtml:p><![CDATA[Initial value]]></xhtml:p>
</documentation>
</variable>
<variable name="CYCLE">
<type>
<TIME/>
</type>
<documentation>
<xhtml:p><![CDATA[Sampling period]]></xhtml:p>
</documentation>
</variable>
</inputVars>
<outputVars>
<variable name="Q">
<type>
<BOOL/>
</type>
<documentation>
<xhtml:p><![CDATA[NOT R1]]></xhtml:p>
</documentation>
</variable>
<variable name="XOUT">
<type>
<REAL/>
</type>
<documentation>
<xhtml:p><![CDATA[Integrated output]]></xhtml:p>
</documentation>
</variable>
</outputVars>
</interface>
<body>
<ST>
<xhtml:p><![CDATA[Q := NOT R1 ;
IF R1 THEN XOUT := X0;
ELSIF RUN THEN XOUT := XOUT + XIN * TIME_TO_REAL(CYCLE);
END_IF;]]></xhtml:p>
</ST>
</body>
<documentation>
<xhtml:p><![CDATA[The integral function block integrates the value of input XIN over time.]]></xhtml:p>
</documentation>
</pou>
<pou name="DERIVATIVE" pouType="functionBlock">
<interface>
<inputVars>
<variable name="RUN">
<type>
<BOOL/>
</type>
<documentation>
<xhtml:p><![CDATA[0 = reset]]></xhtml:p>
</documentation>
</variable>
<variable name="XIN">
<type>
<REAL/>
</type>
<documentation>
<xhtml:p><![CDATA[Input to be differentiated]]></xhtml:p>
</documentation>
</variable>
<variable name="CYCLE">
<type>
<TIME/>
</type>
<documentation>
<xhtml:p><![CDATA[Sampling period]]></xhtml:p>
</documentation>
</variable>
</inputVars>
<outputVars>
<variable name="XOUT">
<type>
<REAL/>
</type>
<documentation>
<xhtml:p><![CDATA[Differentiated output]]></xhtml:p>
</documentation>
</variable>
</outputVars>
<localVars>
<variable name="X1">
<type>
<REAL/>
</type>
</variable>
<variable name="X2">
<type>
<REAL/>
</type>
</variable>
<variable name="X3">
<type>
<REAL/>
</type>
</variable>
</localVars>
</interface>
<body>
<ST>
<xhtml:p><![CDATA[IF RUN THEN
XOUT := (3.0 * (XIN - X3) + X1 - X2)
/ (10.0 * TIME_TO_REAL(CYCLE));
X3 := X2;
X2 := X1;
X1 := XIN;
ELSE
XOUT := 0.0;
X1 := XIN;
X2 := XIN;
X3 := XIN;
END_IF;]]></xhtml:p>
</ST>
</body>
<documentation>
<xhtml:p><![CDATA[The derivative function block produces an output XOUT proportional to the rate of change of the input XIN.]]></xhtml:p>
</documentation>
</pou>
<pou name="PID" pouType="functionBlock">
<interface>
<inputVars>
<variable name="AUTO">
<type>
<BOOL/>
</type>
<documentation>
<xhtml:p><![CDATA[0 - manual , 1 - automatic]]></xhtml:p>
</documentation>
</variable>
<variable name="PV">
<type>
<REAL/>
</type>
<documentation>
<xhtml:p><![CDATA[Process variable]]></xhtml:p>
</documentation>
</variable>
<variable name="SP">
<type>
<REAL/>
</type>
<documentation>
<xhtml:p><![CDATA[Set point]]></xhtml:p>
</documentation>
</variable>
<variable name="X0">
<type>
<REAL/>
</type>
<documentation>
<xhtml:p><![CDATA[Manual output adjustment - Typically from transfer station]]></xhtml:p>
</documentation>
</variable>
<variable name="KP">
<type>
<REAL/>
</type>
<documentation>
<xhtml:p><![CDATA[Proportionality constant]]></xhtml:p>
</documentation>
</variable>
<variable name="TR">
<type>
<REAL/>
</type>
<documentation>
<xhtml:p><![CDATA[Reset time]]></xhtml:p>
</documentation>
</variable>
<variable name="TD">
<type>
<REAL/>
</type>
<documentation>
<xhtml:p><![CDATA[Derivative time constant]]></xhtml:p>
</documentation>
</variable>
<variable name="CYCLE">
<type>
<TIME/>
</type>
<documentation>
<xhtml:p><![CDATA[Sampling period]]></xhtml:p>
</documentation>
</variable>
</inputVars>
<outputVars>
<variable name="XOUT">
<type>
<REAL/>
</type>
</variable>
</outputVars>
<localVars>
<variable name="ERROR">
<type>
<REAL/>
</type>
<documentation>
<xhtml:p><![CDATA[PV - SP]]></xhtml:p>
</documentation>
</variable>
<variable name="ITERM">
<type>
<derived name="INTEGRAL"/>
</type>
<documentation>
<xhtml:p><![CDATA[FB for integral term]]></xhtml:p>
</documentation>
</variable>
<variable name="DTERM">
<type>
<derived name="DERIVATIVE"/>
</type>
<documentation>
<xhtml:p><![CDATA[FB for derivative term]]></xhtml:p>
</documentation>
</variable>
</localVars>
</interface>
<body>
<ST>
<xhtml:p><![CDATA[ERROR := PV - SP ;
(*** Adjust ITERM so that XOUT := X0 when AUTO = 0 ***)
ITERM(RUN := AUTO, R1 := NOT AUTO, XIN := ERROR,
X0 := TR * (X0 - ERROR), CYCLE := CYCLE);
DTERM(RUN := AUTO, XIN := ERROR, CYCLE := CYCLE);
XOUT := KP * (ERROR + ITERM.XOUT/TR + DTERM.XOUT*TD);]]></xhtml:p>
</ST>
</body>
<documentation>
<xhtml:p><![CDATA[The PID (proportional, Integral, Derivative) function block provides the classical three term controller for closed loop control.]]></xhtml:p>
</documentation>
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<pou name="RAMP" pouType="functionBlock">
<interface>
<inputVars>
<variable name="RUN">
<type>
<BOOL/>
</type>
<documentation>
<xhtml:p><![CDATA[0 - track X0, 1 - ramp to/track X1]]></xhtml:p>
</documentation>
</variable>
<variable name="X0">
<type>
<REAL/>
</type>
</variable>
<variable name="X1">
<type>
<REAL/>
</type>
</variable>
<variable name="TR">
<type>
<TIME/>
</type>
<documentation>
<xhtml:p><![CDATA[Ramp duration]]></xhtml:p>
</documentation>
</variable>
<variable name="CYCLE">
<type>
<TIME/>
</type>
<documentation>
<xhtml:p><![CDATA[Sampling period]]></xhtml:p>
</documentation>
</variable>
</inputVars>
<outputVars>
<variable name="BUSY">
<type>
<BOOL/>
</type>
<documentation>
<xhtml:p><![CDATA[BUSY = 1 during ramping period]]></xhtml:p>
</documentation>
</variable>
<variable name="XOUT">
<type>
<REAL/>
</type>
<initialValue>
<simpleValue value="0.0"/>
</initialValue>
</variable>
</outputVars>
<localVars>
<variable name="XI">
<type>
<REAL/>
</type>
<documentation>
<xhtml:p><![CDATA[Initial value]]></xhtml:p>
</documentation>
</variable>
<variable name="T">
<type>
<TIME/>
</type>
<initialValue>
<simpleValue value="T#0s"/>
</initialValue>
<documentation>
<xhtml:p><![CDATA[Elapsed time of ramp]]></xhtml:p>
</documentation>
</variable>
</localVars>
</interface>
<body>
<ST>
<xhtml:p><![CDATA[BUSY := RUN ;
IF RUN THEN
IF T >= TR THEN
BUSY := 0;
XOUT := X1;
ELSE XOUT := XI + (X1-XI) * TIME_TO_REAL(T)
/ TIME_TO_REAL(TR);
T := T + CYCLE;
END_IF;
ELSE
XOUT := X0;
XI := X0;
T := T#0s;
END_IF;]]></xhtml:p>
</ST>
</body>
<documentation>
<xhtml:p><![CDATA[The RAMP function block is modelled on example given in the standard.]]></xhtml:p>
</documentation>
</pou>
<pou name="HYSTERESIS" pouType="functionBlock">
<interface>
<inputVars>
<variable name="XIN1">
<type>
<REAL/>
</type>
</variable>
<variable name="XIN2">
<type>
<REAL/>
</type>
</variable>
<variable name="EPS">
<type>
<REAL/>
</type>
</variable>
</inputVars>
<outputVars>
<variable name="Q">
<type>
<BOOL/>
</type>
</variable>
</outputVars>
</interface>
<body>
<ST>
<xhtml:p><![CDATA[IF Q THEN
IF XIN1 < (XIN2 - EPS) THEN
Q := 0;
END_IF;
ELSIF XIN1 > (XIN2 + EPS) THEN
Q := 1;
END_IF;]]></xhtml:p>
</ST>
</body>
<documentation>
<xhtml:p><![CDATA[The hysteresis function block provides a hysteresis boolean output driven by the difference of two floating point (REAL) inputs XIN1 and XIN2.]]></xhtml:p>
</documentation>
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<configurations/>
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