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ControlLogix Platform ♦ "C" Programmable CIP API Functions

Linux Application Development Module Developer's Manual

ProSoft Technology, Inc. Page 89 of 264

March 12, 2014

connHandle identifies this connection. This value must be passed to the

OCXcip_SendConnected and OCXcip_ReadConnected functions.

reg_param is the value that was passed to OCXcip_RegisterAssemblyObj. The

application may use this to store an index or pointer. It is not used by the API.

reason specifies whether the connection is being opened or closed. A value of

OCX_CIP_CONN_OPEN indicates the connection is being opened,

OCX_CIP_CONN_OPEN_COMPLETE indicates the connection has been successfully

opened, OCX_CIP_NULL_OPEN indicates there is new configuration data for a

currently open connection, and OCX_CIP_CONN_CLOSE indicates the connection is

being closed. If reason is OCX_CIP_CONN_CLOSE, the following parameters are

unused: producerCP, consumerCP, api, rxDataSize, and txDataSize.

instance is the instance number that is passed in the forward open.

Note: This corresponds to the Configuration Instance on the RSLogix 5000 generic profile.

producerCP is the producer connection point from the open request.

Note: This corresponds to the Input Instance on the RSLogix 5000 generic profile.

consumerCP is the consumer connection point from the open request.

Note: This corresponds to the Output Instance on the RSLogix 5000 generic profile.

lOTApi is a pointer to the originator-to-target actual packet interval for this

connection, expressed in microseconds. This is the rate at which connection data

packets will be received from the originator. This value is initialized according to

the requested packet interval from the open request. The application may choose

to reject the connection if the value is not within a predetermined range. If the

connection is rejected, return OCX_CIP_FAILURE and set extendederr to

OCX_CIP_EX_BAD_RPI. Note: The minimum RPI value supported by the 56SAM

module is 200us.

lTOApi is a pointer to the target-to-originator actual packet interval for this

connection, expressed in microseconds. This is the rate at which connection data

packets will be transmitted by the module. This value is initialized according to

the requested packet interval from the open request. The application may choose

to increase this value if necessary.

lODeviceSn is the serial number of the originating device, and iOVendorId is the

vendor ID. The combination of vendor ID and serial number is guaranteed to be

unique, and may be used to identify the source of the connection request. This is

important when connection requests may be originated by multiple devices.

rxDataSize is the size in bytes of the data to be received on this connection.

txDataSize is the size in bytes of the data to be sent on this connection.

configData is a pointer to a buffer containing any configuration data that was sent

with the open request. configSize is the size in bytes of the configuration data.

extendederr is a pointer to a word which may be set by the callback function to

an extended error code if the connection open request is refused.

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