Difference between revisions of "S7-SoftPLC:ADDI-DATA configuration"

Latest revision as of 14:23, 19 December 2012

The ADDI-DATA-driver allows to access Digital I/O and Analog I/O cards from the PLC-program of S7-SoftPLC. With the ADDI-PACK software the physical IO-cards are mapped into a single virtual card. It can be accessed over functions (FC-blocks), which need to be called from the PLC-program. A cyclic data exchange over the process image does not make sense, due to the ADDI-DATA functions infrastructure.

Requirements

• The interface card has to be installed on the computer.
• The adequate drivers of ADDI-DATA have to be installed.
• The software ADDIPACK has to be installed and correctly licenced.
• The interface card has to be configured in the ADDI-PACK.

(if there are any problems, please contact the ADDI-DATA documentation and/or the ADDI-DATA support.)

• The "ADDI-DATA PC-Card" driver has to be selected in S7-SoftPLC.

Accessing the I/O card

The FC-blocks, installed by the driver in S7-SoftPLC, represent functions of the ADDIDATA.DLL provided by ADDI-DATA. These functions are transparently mapped as FC-blocks into the PLC-program. For detailed information please read the adequate documentation of ADDI-DATA. The parameter "dw_DriverHandle" described in the ADDI-DATA documentation is not required, because the S7-SoftPLC driver takes care of opening and closing the ADDI-DATA driver as well as passing the "dw_DriverHandle" to the ADDI-DATA functions.

Read8DigitalInputs:

Corresponds to the function "b_ADDIDATA_Read8DigitalInputs (DWORD dw_DriverHandle, BYTE b_Port, PBYTE pb_PortValue)".

Request:

The parameter IN0 corresponds to the ADDI-DATA parameter b_Port. The parameter OUT1 corresponds to the ADDI-DATA parameter pb_PortValue. The driver itself takes care of the dw_DriverHandle. The result of the function is returned in RET_VAL. This scheme applies to every driver function.

Read16DigitalInputs:

Corresponds to the function "b_ADDIDATA_Read16DigitalInputs(DWORD dw_DriverHandle, BYTE b_Port, PWORD pw_PortValue)".

Request:

Read32DigitalInputs:

Corresponds to the function "b_ADDIDATA_Read32DigitalInputs(DWORD dw_DriverHandle, BYTE b_Port, PDWORD pdw_PortValue)".

Request:

Set8DigitalOutputs:

Corresponds to the function "b_ADDIDATA_Set8DigitalOutputsOn(DWORD dw_DriverHandle, BYTE b_Port, BYTE b_PortValue)".

Request:

Set16DigitalOutputs:

Corresponds to the function "b_ADDIDATA_Set16DigitalOutputsOn(DWORD dw_DriverHandle, BYTE b_Port, WORD w_PortValue)".

Request:

Set32DigitalOutputs:

Corresponds to the function "b_ADDIDATA_Set32DigitalOutputsOn(DWORD dw_DriverHandle, BYTE b_Port, DWORD dw_PortValue)".

Request:

InitAnalogInput:

Corresponds to the function "b_ADDIDATA_InitAnalogInput(DWORD dw_DriverHandle, WORD w_Channel, pstr_InitAnalogInput ps_InitParameters, DWORD dw_StructSize)".

This function requires a data structure for the initialisation of an input (see card documentation). The structure is passed to the FC with an ANY-pointer of the type byte (ps_InitParameters). A seperate parameter for length of the structure (dw_StructSize) is not neccessary, it is taken from the ANY-pointer.

Request:

ReleaseAnalogInput:

Corresponds to the function "b_ADDIDATA_ReleaseAnalogInput(DWORD dw_DriverHandle, WORD w_Channel)".

Request:

InitAnalogOutput:

Corresponds to the function "b_ADDIDATA_Init1AnalogOutput(DWORD dw_DriverHandle, WORD w_Channel, BYTE b_VoltageMode, BYTE b_Polarity)".

Request:

ReadAnalogInput:

Corresponds to the function "b_ADDIDATA_Read1AnalogInput(DWORD dw_DriverHandle, WORD w_Channel, DWORD dw_ConvertingTime, BYTE b_ConvertingTimeUnit, BYTE b_InterruptFlag, PDWORD pdw_ChannelValue)".

The function requires a pointer to the return value (see card documentation). The structure is passed to the FC with an ANY-Pointer of the type dword (pdw_ChannelValue). Please note, that the ANY-Pointer always has to have the length of DWORD 3 (12 byte).

The parameter b.InterruptFlag is not used, because it runs in polling-mode only.

Request:

WriteAnalogOutput:

Corresponds to the function "b_ADDIDATA_Write1AnalogOutput(DWORD dw_DriverHandle, WORD w_Channel, dw_ValueToWrite)".

Request:

Return values:

On success RET_VAL = 0 is returned.

If an error has occurred, the error code from ADDIDATA.DLL is passed through, if possible.

If it should not be possible, the following error codes are returned:

PLC switches to STOP:

If S7-SoftPLC is switched to STOP by the driver, an error code is inserted into the diagnostic buffer, which can be read out with the programming unit (S7 für Windows^®, STEP^®7).