Close Connection Request

At a Glance

Use MBP_MSTR operation 16 to close a Modbus TCP/IP connection on the network.

NOTE: This operation is not available on Modbus Plus ports (embedded port on CPU or NOM modules).

Block Operation

The MBP_MSTR block can send requests and receive responses up to 253 bytes long. For block operation, refer to the block description:

When the ENABLE input pin is turned ON, operation 15 begins.
If the ABORT input pin is turned ON or if the ENABLE input pin is turned OFF, the operation ends.
The ACTIVE output pin is ON during the operation.
The ERROR output pin turns ON if the operation aborts without success.
The SUCCESS output pin turns ON if the operation completes with success.
The CONTROL and DATABUF output pins define the operation.
EN and ENO can be configured as additional parameters.

Control Block

The format of the CONTROL block is described below:

Register	Function	Description
CONTROL[1]	Operation	16 = close connection
CONTROL[2]	Error status	Indicates detected error status (read only)
CONTROL[3]	(not used)	–
CONTROL[4]	(not used)	–
CONTROL[5]	Routing Register	High byte = Ethernet communication module slot
CONTROL[5]	Routing Register	Low byte = MBP on Ethernet transporter (MET) mapping index (also known as Unit ID)
CONTROL[6]	IP Address	Byte 4 of the IP address (MSB)
CONTROL[7]		Byte 3 of the IP address
CONTROL[8]		Byte 2 of the IP address
CONTROL[9]		Byte 1 of the IP address (LSB)