Input/Output Address Mapping of DeviceObjects

Engineering 🇬🇧
PLKM
2016-02-09
2021-01-21

  • PLKM - 2016-02-09

    Is it possible to get the address mapping (%QB0,...) of IO Devices ?

     

  • Anonymous - 2016-02-10

    Originally created by: M.Schaber

    Hi,

    PLKM hat geschrieben:
    Is it possible to get the address mapping (%QB0,...) of IO Devices ?

    This is possible since V3.5 SP8.

    Here's a small toy script:

    \#
\# Methods
\#
def printDevParams(parmSet):
   for param in parmSet:
      print("param id={} name={}".format(param.id, param.name))
      printData(param, "")
def printData(data, indent):
   print("{}data identifier={} value={}".format(indent, data.identifier, data.value))
   if data.is_mappable_io:
      io = data.io_mapping
      print("{}IO variable={}".format(indent, io.variable))
      if io.default_variable != None:
         print("{}IO default_variable={}".format(indent, io.default_variable))
   if data.has_sub_elements:
      for subData in data:
         printData(subData, indent + "--")
\#
\# Main program
\#
proj = projects.primary
found = proj.find("In1", True)
assert(len(found) == 1, "more than one object found")
dev = found[0]
print("device found")
parms = dev.device_parameters
if len(parms) > 0:
   printDevParams(parms)
for conn in dev.connectors:
   print("connector={} id={}".format(conn.interface, conn.connector_id))
   parms = conn.host_parameters
   if len(parms) > 0:
      printDevParams(parms)
conn = dev.connectors.by_id(1)
input = conn.host_parameters.by_id(1)
\# Check if byte is mapped
byte0 = input["Byte0"]
io = byte0.io_mapping
if io.variable == "Application.GVL.byInput0":
   print("Byte0 is mapped correctly")
\# Map some bytes and bits
byte = input["Byte1"]
io = byte.io_mapping
io.variable = "byInput1"
print("Byte1 mapped now")
if io.mapping_creates_variable:
   print("Mapping creates the variable")
byte = input["Byte2"]
io = byte.io_mapping
io.variable = "Application.GVL.byInput2"
print("Byte2 mapped now")
if io.maps_to_existing_variable:
   print("Mapping to existing variable")
byte = input["Byte3"]
bit = byte["Bit0"]
io = bit.io_mapping
io.variable = "Application.GVL.xBit0"
print("Byte3.Bit0 mapped now")
bit = byte["Bit1"]
io = bit.io_mapping
io.variable = "Application.GVL.xBit1"
print("Byte3.Bit1 mapped now")
\# Check for automatic and manual IEC addressing
io = byte0.io_mapping
if io.automatic_iec_address:
   print("IEC address is automatically set to " + io.manual_iec_address)
   io.manual_iec_address = "%IB10"
   if not io.automatic_iec_address:
      print("IEC address was switch to manual addressing")
      if io.manual_iec_address == "%IB10":
         print("IEC address was set correctly to " + io.manual_iec_address)
   io.manual_iec_address = None
   if io.automatic_iec_address:
      print("IEC address was switch back to automatic addressing")
else:
   print("IEC address is manually set to " + io.manual_iec_address)
     

  • PLKM - 2016-02-10

    perfect, thank you

     

  • ThKa - 2017-04-24

    Hi,

    Is it a known limitation that you cannot map to an element of an array?

    for i in input:                           #ScriptValueDataElement
   i.io_mapping.variable = 'Application.GVL.G_xTest[0]'

    Best Regards
    Thomas

     

  • mkeller - 2017-04-25

    Hi Thomas.

    ThKa hat geschrieben:
    Is it a known limitation that you cannot map to an element of an array?

    for i in input:                           #ScriptValueDataElement
   i.io_mapping.variable = 'Application.GVL.G_xTest[0]'

    Have you tried it manually in the device editor?

    To reproduce the problem I need some additional information. What data type has the array in the GVL and the input in the IO mapping? Which version of CODESYS did you use?

    BR
    MArtin

     

  • ThKa - 2017-04-25

    Hi M.Keller,

    The version is 3.5 SP10.

    the GVL, an array of datatype BOOL which I map to %IX

    VAR_GLOBAL
   G_axInputArray : ARRAY[0..3] OF BOOL;
END_VAR

    (...The Python code works if I don't use an array)

    The output from the interpreter using an array:

    Zitat:
    Invalid variable name: 'G_axInputArray[0]' is not a valid identifier.

     

  • jaka - 2021-01-21

    I tryed the scrip but it did not work. It shows an error at line with "byte0 = input["Byte0"]"

    It says "Operation not allowed on simple types"

     
    Thumbnail
    Posnetek zaslona 2021-01-21 101557.png

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