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CP1L-EL/EM: Close Socket Function Block

TCP Close Socket
Name Close_Socket: TCP Close Socket
Basic Function Request for Close Socket 1, 2 or 3
Originates from Tsunagi Lab Europe
Created by OEE-HQ HvB (creation and testing)
File Name Close_Socket.cxf
Applicable models CPU Unit CP1L-EL or CP1L-EM
CX-Programmer Version 9.40 or higher
Conditions for usage None
Function Description TCP Close_Socket Function Block closes the Socket associated with the SocketNo input.
Kind of FB definition Connect Always ON type
  Connect the EN input to the Always ON Flag (P_ON)
  The same instance cannot be used in two or more places
FB Precautions

Omron can not be held responsible in case of malfunction

EN input condition • Connect EN to condition for the FB to Work
• Close Socket closes the required Socket Number
• Socket Numbere
  Input variables
• Socket Number 1 to 3
  Output variables • This FB requires multiple cycles to process.
• The status of the Outputs bits are Reset if the CloseSocket bit is OFF.
Application example TCP Close_Socket Function Block is designed for use with the other Function Blocks. For more more details on the use of this function block see also CP1L-EL/EM Modbus TCP Client Socket Services.
The Socket Number Output can be used for the Socket Number Input used by:

- Open_Socket
- Fn03_ReadRegister
- Fn04_ReadInputRegister
- Fn05_ForceSingleCoil
- Fn06_WriteRegister


Related manuals CP1L-EM/EL CPU Unit Manual (W516-E1)
  • Variable Table 

Input Variables

Name Variable name Data type Default Range Description
EN EN BOOL     1 (ON): Starts FB
0 (OFF): Does not start FB
Close Socket CloseSocket BOOL     Start request for Close Socket
Socket Number SocketNo UNIT   &1 to &3 &1 to &3

Output Variables

Name Variable name Data type Range Description
ENO (may be omitted) ENO BOOL   1 (ON): FB operating normally
0 (OFF): FB not operating normally
Done Done BOOL   Done
Error Error BOOL   Error
Error ID ErrorID UNIT   Error code:
TCP/UDP Error Codes
Ethernet Units Construction of Networks Operation Manual (W420)
7-3 Command/Response Reference FINS Error Codes Communications Commands Reference Manual (W342)
5-1-3 Error Codes CP1L-EL/EM CPU Unit Operation Manual (W516) 12-1 Troubleshooting

Revision History

Version Date Contents
1.00 21-Apr-2012 Original production


This manual is a reference that explains the function block functions. It does not explain the operational limitations of Units, components, or combinations of Units and components. Always read and understand the Operation Manuals for the system’s Units and other components before using them.



Close_Socket.pdf - Size: 150791
Close_Socket.cxf - Size: 2052

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Created 2012-04-17
Modified 2013-11-21
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