Module: ModBus::TCP

Includes:
Errors, Timeout
Included in:
RTUViaTCPClient, TCPClient
Defined in:
lib/rmodbus/tcp.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#ipaddr ⇒ Object (readonly)

Returns the value of attribute ipaddr.



8
9
10
 
# File 'lib/rmodbus/tcp.rb', line 8

def ipaddr
  @ipaddr
end

#port ⇒ Object (readonly)

Returns the value of attribute port.



8
9
10
 
# File 'lib/rmodbus/tcp.rb', line 8

def port
  @port
end

Instance Method Details

#open_tcp_connection(ipaddr, port, opts = {}) ⇒ TCPSocket

Open TCP socket

Parameters:

  • ipaddr (String) —

    IP address of remote server

  • port (Integer) —

    connection port

  • opts (Hash) (defaults to: {}) —

    options of connection

Options Hash (opts):

  • :connect_timeout (Float, Integer) —

    seconds timeout for open socket

Returns:

  • (TCPSocket) —

    socket

Raises:



18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
 
# File 'lib/rmodbus/tcp.rb', line 18

def open_tcp_connection(ipaddr, port, opts = {})
  @ipaddr, @port = ipaddr, port

  opts[:connect_timeout] ||= 1

  io = nil
  begin
    timeout(opts[:connect_timeout], ModBusTimeout) do
      io = TCPSocket.new(@ipaddr, @port)
    end
  rescue ModBusTimeout => err
    raise ModBusTimeout.new, 'Timed out attempting to create connection'
  end

  io
end