changeIPAddress: Change the IP address of the controller

Function Block Description

The changeIPAddress function block provides the capability to change dynamically a controller IP address, its subnet mask and its gateway address. The function block can also save the IP address so that it is used in subsequent reboots of the controller.

NOTE: Changing the IP addresses is only possible if the IP mode is configured to fixed IP address. For more details, refer to IP Address Configuration.
NOTE: For more information on the function block, use the Documentation tab of EcoStruxure Machine Expert Library Manager Editor. For the use of this editor, refer to EcoStruxure Machine Expert Functions and Libraries User Guide.

Graphical Representation

Parameter Description

Input

Type

Comment

xExecute

BOOL

  • Rising edge: action starts.

  • Falling edge: resets outputs. If a falling edge occurs before the function block has completed its action, the outputs operate in the usual manner and are only reset if either the action is completed or in the event that an error is detected. In this case, the corresponding output values (xDone, xError, iError) are present at the outputs for exactly one cycle.

xSave

BOOL

TRUE: save configuration for subsequent reboots of the controller.

eChannel

changeIPAddress_Channel

The input eChannel is the Ethernet port to be configured. Depending on the number of the ports available on the controller in changeIPAddress_Channel (0 or 1).See changeIPAddress_Channel: Ethernet port to be configured.

i_abyIPAddress

ARRAY[0..3] OF BYTE

The new IP Address to be configured. Format: 0.0.0.0.

NOTE: If this input is set to 0.0.0.0 then the controller default IP addresses is configured.

i_abyIPMask

ARRAY[0..3] OF BYTE

The new subnet mask. Format: 0.0.0.0

i_abyIPGateway

ARRAY[0..3] OF BYTE

The new gateway IP address. Format: 0.0.0.0

Output

Type

Comment

xDone

BOOL

TRUE: if IP Addresses have been successfully configured or if default IP Addresses have been successfully configured because input i_abyIPAddress is set to 0.0.0.0.

xBusy

BOOL

Function block active.

xError

BOOL

  • TRUE: error detected, function block aborts action.

  • FALSE: no error has been detected.

eError

changeIPAddress_Error

Error code of the detected error.

xSaved

BOOL

Configuration saved for the subsequent reboots of the controller.

q_abyIPAddress

ARRAY[0..3] OF BYTE

Current controller IP address. Format: 0.0.0.0.

q_abyIPMask

ARRAY[0..3] OF BYTE

Current subnet mask. Format: 0.0.0.0.

q_abyIPGateway

ARRAY[0..3] OF BYTE

Current gateway IP address. Format: 0.0.0.0.

changeIPAddress_Channel: Ethernet port to be configured

The changeIPAddress_Channel enumeration data type contains the following values:

Enumerator

Value

Description

CHANNEL_ETHERNET_NETWORK

0

M241, M251MESC, M258, LMC058, LMC078: Ethernet port

M251MESE: Ethernet_2 port

CHANNEL_DEVICE_NETWORK

1

M241: TM4ES4 Ethernet port

M251MESE: Ethernet_1 port

changeIPAddress_Error: Error Codes

The changeIPAddress_Error enumeration data type contains the following values:

Enumerator

Value

Description

ERR_NO_ERROR

00 hex

No error detected.

ERR_UNKNOWN

01 hex

Internal error detected.

ERR_INVALID_MODE

02 hex

IP address is not configured as a fixed IP address.

ERR_INVALID_IP

03 hex

Invalid IP address.

ERR_DUPLICATE_IP

04 hex

The new IP address is already used in the network.

ERR_WRONG_CHANNEL

05 hex

Incorrect Ethernet communication port.

ERR_IP_BEING_SET

06 hex

IP address is already being changed.

ERR_SAVING

07 hex

IP addresses not saved due to a detected error or no non-volatile memory present.

ERR_DHCP_SERVER

08 hex

A DHCP server is configured on this Ethernet communication port.