tests/logging/plc.xml
author Andrey Skvortsov <andrej.skvortzov@gmail.com>
Fri, 10 Aug 2018 17:45:33 +0300
changeset 2278 a3ac46366b86
parent 1525 36e912fac70f
child 2296 a2ab363f9e90
permissions -rw-r--r--
Dirty fix for error '_object_has_no_attribute_'getSlave' in EtherCAT extension

traceback:
File "/home/developer/WorkData/PLC/beremiz/beremiz/IDEFrame.py", line 1433, in OnPouSelectedChanged
window.RefreshView()
File "/home/developer/WorkData/PLC/beremiz/beremiz/etherlab/ConfigEditor.py", line 837, in RefreshView
self.RefreshProcessVariables()
File "/home/developer/WorkData/PLC/beremiz/beremiz/etherlab/ConfigEditor.py", line 886, in RefreshProcessVariables
slaves = self.Controler.GetSlaves(**self.CurrentNodesFilter)
File "/home/developer/WorkData/PLC/beremiz/beremiz/etherlab/EthercatMaster.py", line 341, in GetSlaves
for slave in self.Config.getConfig().getSlave():
<type 'exceptions.AttributeError'>:_'lxml.etree._Element'_object_has_no_attribute_'getSlave'

Steps to reproduce problem:

- Add new EtherCAT master
- Add new EthercatNode to the master
- double click on


this is looks like dirty hack to fix strange problem with initial[0]
changing its type after returning from _init_ method to lxml.etree._Element
As a result all methods generated by class factory are lost.

For example, in function initMethod initial[0].__class__ points to
xmlclass.xmlclass.Config. After map(self.append, initial)
self.Config.__class__ is 'xmlclass.xmlclass.Config' as well.
But after returning from initMethod (_init) in CreateElement
self.Config.__class__ has changed to lxml.etree._Element.


I've noticed similar behavior if copy/deepcopy is used for any child
of etree.ElementBase. See simple example below.
[-------------------------------------------------------------]
#!/usr/bin/python

from __future__ import print_function
from lxml import etree
import copy

class DefaultElementClass(etree.ElementBase):
def getLocalTag(self):
return etree.QName(self.tag).localname


def printInformation(x):
print(x, x.__class__, "getLocalTag" in dir(x))


a = DefaultElementClass()
printInformation(a)

#
printInformation(copy.copy(a))
printInformation(copy.deepcopy(a))
[-------------------------------------------------------------]
<?xml version='1.0' encoding='utf-8'?>
<project xmlns="http://www.plcopen.org/xml/tc6_0201" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xhtml="http://www.w3.org/1999/xhtml" xsi:schemaLocation="http://www.plcopen.org/xml/tc6_0201">
  <fileHeader companyName="Unknown" productName="Generic PLC" productVersion="1" creationDateTime="2013-01-29T14:01:00" contentDescription="This example shows logging functionality in Beremiz.&#10;Here are shown two ways of logging:&#10;- from IEC PLC program;&#10;- from python extension.&#10;"/>
  <contentHeader name="Logging example" modificationDateTime="2016-09-09T17:54:15">
    <coordinateInfo>
      <fbd>
        <scaling x="0" y="0"/>
      </fbd>
      <ld>
        <scaling x="0" y="0"/>
      </ld>
      <sfc>
        <scaling x="0" y="0"/>
      </sfc>
    </coordinateInfo>
  </contentHeader>
  <types>
    <dataTypes/>
    <pous>
      <pou name="program0" pouType="program">
        <interface>
          <localVars>
            <variable name="beat">
              <type>
                <BOOL/>
              </type>
            </variable>
            <variable name="count">
              <type>
                <INT/>
              </type>
            </variable>
            <variable name="LOGGER0">
              <type>
                <derived name="LOGGER"/>
              </type>
            </variable>
            <variable name="lvl">
              <type>
                <derived name="LOGLEVEL"/>
              </type>
              <initialValue>
                <simpleValue value="INFO"/>
              </initialValue>
            </variable>
            <variable name="Timer">
              <type>
                <derived name="TOF"/>
              </type>
            </variable>
          </localVars>
        </interface>
        <body>
          <FBD>
            <inVariable localId="2" height="30" width="170" executionOrderId="0" negated="false">
              <position x="507" y="347"/>
              <connectionPointOut>
                <relPosition x="170" y="15"/>
              </connectionPointOut>
              <expression>'IEC side logging: beat #'</expression>
            </inVariable>
            <block localId="3" width="59" height="40" typeName="NOT" executionOrderId="0">
              <position x="241" y="269"/>
              <inputVariables>
                <variable formalParameter="IN">
                  <connectionPointIn>
                    <relPosition x="0" y="30"/>
                    <connection refLocalId="14" formalParameter="Q">
                      <position x="241" y="299"/>
                      <position x="195" y="299"/>
                    </connection>
                  </connectionPointIn>
                </variable>
              </inputVariables>
              <inOutVariables/>
              <outputVariables>
                <variable formalParameter="OUT">
                  <connectionPointOut>
                    <relPosition x="59" y="30"/>
                  </connectionPointOut>
                </variable>
              </outputVariables>
            </block>
            <inOutVariable localId="4" height="27" width="51" executionOrderId="0" negatedOut="false" negatedIn="false">
              <position x="66" y="286"/>
              <connectionPointIn>
                <relPosition x="0" y="13"/>
                <connection refLocalId="3" formalParameter="OUT">
                  <position x="66" y="299"/>
                  <position x="37" y="299"/>
                  <position x="37" y="372"/>
                  <position x="314" y="372"/>
                  <position x="314" y="299"/>
                  <position x="300" y="299"/>
                </connection>
              </connectionPointIn>
              <connectionPointOut>
                <relPosition x="51" y="13"/>
              </connectionPointOut>
              <expression>beat</expression>
            </inOutVariable>
            <block localId="5" width="68" height="98" typeName="ADD" executionOrderId="0">
              <position x="463" y="385"/>
              <inputVariables>
                <variable formalParameter="IN1">
                  <connectionPointIn>
                    <relPosition x="0" y="39"/>
                    <connection refLocalId="10" formalParameter="OUT">
                      <position x="463" y="424"/>
                      <position x="452" y="424"/>
                      <position x="452" y="424"/>
                      <position x="454" y="424"/>
                      <position x="454" y="424"/>
                      <position x="444" y="424"/>
                    </connection>
                  </connectionPointIn>
                </variable>
                <variable formalParameter="IN2">
                  <connectionPointIn>
                    <relPosition x="0" y="78"/>
                    <connection refLocalId="6">
                      <position x="463" y="463"/>
                      <position x="444" y="463"/>
                    </connection>
                  </connectionPointIn>
                </variable>
              </inputVariables>
              <inOutVariables/>
              <outputVariables>
                <variable formalParameter="OUT">
                  <connectionPointOut>
                    <relPosition x="68" y="39"/>
                  </connectionPointOut>
                </variable>
              </outputVariables>
            </block>
            <inOutVariable localId="6" height="27" width="103" executionOrderId="0" negatedOut="false" negatedIn="false">
              <position x="341" y="450"/>
              <connectionPointIn>
                <relPosition x="0" y="13"/>
                <connection refLocalId="5" formalParameter="OUT">
                  <position x="341" y="463"/>
                  <position x="320" y="463"/>
                  <position x="320" y="500"/>
                  <position x="544" y="500"/>
                  <position x="544" y="424"/>
                  <position x="531" y="424"/>
                </connection>
              </connectionPointIn>
              <connectionPointOut>
                <relPosition x="103" y="13"/>
              </connectionPointOut>
              <expression>count</expression>
            </inOutVariable>
            <block localId="8" width="67" height="144" typeName="CONCAT" executionOrderId="0">
              <position x="727" y="311"/>
              <inputVariables>
                <variable formalParameter="IN1">
                  <connectionPointIn>
                    <relPosition x="0" y="51"/>
                    <connection refLocalId="2">
                      <position x="727" y="362"/>
                      <position x="677" y="362"/>
                    </connection>
                  </connectionPointIn>
                </variable>
                <variable formalParameter="IN2">
                  <connectionPointIn>
                    <relPosition x="0" y="113"/>
                    <connection refLocalId="9" formalParameter="OUT">
                      <position x="727" y="424"/>
                      <position x="677" y="424"/>
                    </connection>
                  </connectionPointIn>
                </variable>
              </inputVariables>
              <inOutVariables/>
              <outputVariables>
                <variable formalParameter="OUT">
                  <connectionPointOut>
                    <relPosition x="67" y="51"/>
                  </connectionPointOut>
                </variable>
              </outputVariables>
            </block>
            <block localId="9" width="116" height="40" typeName="INT_TO_STRING" executionOrderId="0">
              <position x="561" y="394"/>
              <inputVariables>
                <variable formalParameter="IN">
                  <connectionPointIn>
                    <relPosition x="0" y="30"/>
                    <connection refLocalId="5" formalParameter="OUT">
                      <position x="561" y="424"/>
                      <position x="531" y="424"/>
                    </connection>
                  </connectionPointIn>
                </variable>
              </inputVariables>
              <inOutVariables/>
              <outputVariables>
                <variable formalParameter="OUT">
                  <connectionPointOut>
                    <relPosition x="116" y="30"/>
                  </connectionPointOut>
                </variable>
              </outputVariables>
            </block>
            <block localId="10" width="105" height="40" typeName="BOOL_TO_INT" executionOrderId="0">
              <position x="339" y="394"/>
              <inputVariables>
                <variable formalParameter="IN" edge="rising">
                  <connectionPointIn>
                    <relPosition x="0" y="30"/>
                    <connection refLocalId="3" formalParameter="OUT">
                      <position x="339" y="424"/>
                      <position x="314" y="424"/>
                      <position x="314" y="299"/>
                      <position x="300" y="299"/>
                    </connection>
                  </connectionPointIn>
                </variable>
              </inputVariables>
              <inOutVariables/>
              <outputVariables>
                <variable formalParameter="OUT">
                  <connectionPointOut>
                    <relPosition x="105" y="30"/>
                  </connectionPointOut>
                </variable>
              </outputVariables>
            </block>
            <block localId="11" width="65" height="209" typeName="LOGGER" instanceName="LOGGER0" executionOrderId="0">
              <position x="907" y="248"/>
              <inputVariables>
                <variable formalParameter="TRIG">
                  <connectionPointIn>
                    <relPosition x="0" y="52"/>
                    <connection refLocalId="3" formalParameter="OUT">
                      <position x="907" y="300"/>
                      <position x="300" y="300"/>
                    </connection>
                  </connectionPointIn>
                </variable>
                <variable formalParameter="MSG">
                  <connectionPointIn>
                    <relPosition x="0" y="112"/>
                    <connection refLocalId="8" formalParameter="OUT">
                      <position x="907" y="360"/>
                      <position x="794" y="360"/>
                    </connection>
                  </connectionPointIn>
                </variable>
                <variable formalParameter="LEVEL">
                  <connectionPointIn>
                    <relPosition x="0" y="177"/>
                    <connection refLocalId="12">
                      <position x="907" y="425"/>
                      <position x="879" y="425"/>
                    </connection>
                  </connectionPointIn>
                </variable>
              </inputVariables>
              <inOutVariables/>
              <outputVariables/>
            </block>
            <inVariable localId="12" height="27" width="79" executionOrderId="0" negated="false">
              <position x="800" y="412"/>
              <connectionPointOut>
                <relPosition x="79" y="13"/>
              </connectionPointOut>
              <expression>lvl</expression>
            </inVariable>
            <block localId="14" typeName="TOF" instanceName="Timer" executionOrderId="0" height="98" width="45">
              <position x="150" y="260"/>
              <inputVariables>
                <variable formalParameter="IN">
                  <connectionPointIn>
                    <relPosition x="0" y="39"/>
                    <connection refLocalId="4">
                      <position x="150" y="299"/>
                      <position x="117" y="299"/>
                    </connection>
                  </connectionPointIn>
                </variable>
                <variable formalParameter="PT">
                  <connectionPointIn>
                    <relPosition x="0" y="78"/>
                    <connection refLocalId="1">
                      <position x="150" y="338"/>
                      <position x="117" y="338"/>
                    </connection>
                  </connectionPointIn>
                </variable>
              </inputVariables>
              <inOutVariables/>
              <outputVariables>
                <variable formalParameter="Q">
                  <connectionPointOut>
                    <relPosition x="45" y="39"/>
                  </connectionPointOut>
                </variable>
                <variable formalParameter="ET">
                  <connectionPointOut>
                    <relPosition x="45" y="78"/>
                  </connectionPointOut>
                </variable>
              </outputVariables>
            </block>
            <inVariable localId="1" executionOrderId="0" height="24" width="52" negated="false">
              <position x="65" y="326"/>
              <connectionPointOut>
                <relPosition x="52" y="12"/>
              </connectionPointOut>
              <expression>T#3s</expression>
            </inVariable>
            <comment localId="15" height="212" width="675">
              <position x="27" y="16"/>
              <content>
                <xhtml:p><![CDATA[This example shows logging functionality in Beremiz.
Here are shown two ways of logging:
- from IEC PLC program;
- from python extension.

In IEC PLC program every third second (beat) new message is generated and put in PLC log.
See function blocks below.

Every 15 seconds status of PLC program is put in PLC log from python extension.
For more information about logging from python look at 0.x: py_ext_0 implementation in project tree. 
]]></xhtml:p>
              </content>
            </comment>
          </FBD>
        </body>
      </pou>
    </pous>
  </types>
  <instances>
    <configurations>
      <configuration name="config">
        <resource name="resource1">
          <task name="task0" priority="0" interval="T#100ms">
            <pouInstance name="prg" typeName="program0"/>
          </task>
        </resource>
      </configuration>
    </configurations>
  </instances>
</project>