Class: LadderDrive::Protocol::Omron::OmronDevice

Inherits:
LadderDrive::PlcDevice show all
Defined in:
lib/ladder_drive/protocol/omron/omron_device.rb

Constant Summary collapse

SUFFIXES = 
%w(M H D T C A)

Constants inherited from LadderDrive::PlcDevice

LadderDrive::PlcDevice::ESC_SUFFIXES, LadderDrive::PlcDevice::NUMBER_TYPE_DEC, LadderDrive::PlcDevice::NUMBER_TYPE_DEC_HEX, LadderDrive::PlcDevice::NUMBER_TYPE_HEX

Instance Attribute Summary collapse

Attributes inherited from LadderDrive::PlcDevice

#number, #value

Instance Method Summary collapse

Methods inherited from LadderDrive::PlcDevice

#bool, #bool=, #device_by_suffix_number, #device_code, #input?, program_area_device, #reset, #set_text, status_from_plc_device, status_to_plc_device, #text, #text=

Constructor Details

#initialize(a, b = nil, c = nil) ⇒ OmronDevice 



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# File 'lib/ladder_drive/protocol/omron/omron_device.rb', line 37

def initialize a, b = nil, c=nil
  case a
  when Array
=begin
    case a.size
    when 4
      @suffix = suffix_for_code(a[3])
      @channel = ((a[2] << 8 | a[1]) << 8) | a[0]
    end
=end

  else
    if b
      @suffix = a.upcase if a
      @channel = b.to_i
      @bit = c.to_i if c
    else
      if /^(M|H|D|T|C|A)?([0-9]+)(\.([0-9]{1,2}))?$/i =~ a
        @suffix = $1.upcase if $1
        @channel = $2.to_i
        @bit = $4.to_i if $4
      end
    end
  end
  case @suffix
  when "T", "C"
    raise "#{self.name} is not allowed as a bit device." if @bit
  end
end

Instance Attribute Details

#bit ⇒ Object (readonly)

Returns the value of attribute bit.



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# File 'lib/ladder_drive/protocol/omron/omron_device.rb', line 33

def bit
  @bit
end

#channel ⇒ Object (readonly)

Returns the value of attribute channel.



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# File 'lib/ladder_drive/protocol/omron/omron_device.rb', line 33

def channel
  @channel
end

#suffix ⇒ Object (readonly)

Returns the value of attribute suffix.



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# File 'lib/ladder_drive/protocol/omron/omron_device.rb', line 33

def suffix
  @suffix
end

Instance Method Details

#+(value) ⇒ Object 



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# File 'lib/ladder_drive/protocol/omron/omron_device.rb', line 101

def + value
  if bit
    v = channel * 16 + bit + value
    c = v / 16
    b = v % 16
    self.class.new suffix, c, b
  else
    self.class.new suffix, channel + value
  end
end

#-(value) ⇒ Object 



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# File 'lib/ladder_drive/protocol/omron/omron_device.rb', line 112

def - value
  case value
  when OmronDevice
    d = value
    raise "Can't subtract between different device type." if self.bit_device? ^ d.bit_device?
    if bit
      (channel * 16 + bit) - (d.channel * 16 + d.bit)
    else
      channel - d.channel
    end
  else
    value = value.to_i
    if bit
      v = [channel * 16 + bit - value, 0].max
      c = v / 16
      b = v % 16
      self.class.new suffix, c, b
    else
      self.class.new suffix, [channel - value, 0].max
    end
  end
end

#bit_device? ⇒ Boolean 



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# File 'lib/ladder_drive/protocol/omron/omron_device.rb', line 87

def bit_device?
  !!bit
end

#channel_device ⇒ Object 



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# File 'lib/ladder_drive/protocol/omron/omron_device.rb', line 66

def channel_device
  return self unless bit_device?
  self.class.new suffix, channel
end

#name ⇒ Object 



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# File 'lib/ladder_drive/protocol/omron/omron_device.rb', line 75

def name
  if bit
    "#{suffix}#{channel}.#{bit.to_s.rjust(2, '0')}"
  else
    "#{suffix}#{channel}"
  end
end

#next_device ⇒ Object 



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# File 'lib/ladder_drive/protocol/omron/omron_device.rb', line 83

def next_device
  self + 1
end

#suffix_code ⇒ Object 



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# File 'lib/ladder_drive/protocol/omron/omron_device.rb', line 96

def suffix_code
  index = SUFFIXES.index suffix
  index ? SUFFIX_CODES[index] : 0
end

#suffix_for_code(code) ⇒ Object 



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# File 'lib/ladder_drive/protocol/omron/omron_device.rb', line 91

def suffix_for_code code
  index = SUFFIX_CODES.index code
  index ? SUFFIXES[index] : nil
end

#valid? ⇒ Boolean 



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# File 'lib/ladder_drive/protocol/omron/omron_device.rb', line 71

def valid?
  !!channel
end