class Modbus::PDU::Exception
PDU
for modbus exception (response message)
Attributes
exception_code[RW]
Public Class Methods
create(func_code, error)
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# File lib/modbus/pdu/exception.rb, line 15 def self.create(func_code, error) obj = self.new nil, func_code + 0x80 obj.exception_code = error.code obj end
Public Instance Methods
decode(data)
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Decodes a PDU
from protocol data.
@param data [Modbus::ProtocolData] The protocol data to decode.
# File lib/modbus/pdu/exception.rb, line 26 def decode(data) @exception_code = data.shift_byte end
encode()
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Encodes a PDU
into protocol data.
@return [Modbus::ProtocolData] The protocol data representation of this object.
Calls superclass method
Modbus::PDU#encode
# File lib/modbus/pdu/exception.rb, line 35 def encode data = super data.push_byte @exception_code data end
length()
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Returns the length of the PDU
in bytes.
@return [Integer] The length.
# File lib/modbus/pdu/exception.rb, line 46 def length 2 end