FB_GENIbusGetMValue

VAR_INPUT

bStart            : BOOL;
byAddr            : BYTE := 0;
byIDCode          : BYTE := 0;
eDataSize         : E_GENIBusMDataSize;
eCommandPriority  : E_GENIbusCommandPriority := eGENIbusCommandPriorityMiddle;

bStart: A rising edge at this input starts the reading process.

byAddr : Address of the GENIbus device to be addressed: valid entries: 1 - 200. This corresponds to the setting as is made directly on the GENIbus device. Conversion to the actual address range 32 – 231 (see GENIbus standard), takes place internally in the function block. A broadcast command via address 255 is naturally not permitted.

byIDCode: ID code of the value to be read. In the case of 16, 24 and 32-bit values, the ID of the high byte must be specified here, and the following order is always assumed: ID = hi, ID+1 = lo1, ID+2 = lo2, ID+3 = lo3.

eDataSize: Data size of the measured value: 8, 16, 24 or 32 bytes.

eCommandPriority: Priority (high, medium or low) with which the command is processed by the PLC library.

Example: Read-out of the total pumped volume of water. For this case is:

• byIdCode = 121
• eDataSize = eGENIbusMSize32Bit

Source: Grundfos documentation "Operating the MAGNA3 and MGE model H/I via the GENIpro interface - Edition 01.00.35 - April 2015".

VAR_OUTPUT

bBusy         : BOOL;
bError        : BOOL;
udiErrorId    : UDINT;
udiErrorArg   : UDINT;
stMValue      : ST_GENIbusMValue;

bBusy: Starting with the edge at bStart, this output remains TRUE until the command has been processed.

bError: This output is switched to TRUE as soon as an error occurs during the execution of a command. The command-specific error code is contained in udiErrorId.

udiErrorId: Contains the command-specific error code of the most recently executed command. It is set back to 0 by the reactivation of the function block via the bStart input. See Error codes.

udiErrorArg: If applicable, contains an extended description of the error code.

stMValue : Output of the read value.

VAR_IN_OUT

stCommandBuffer   : ST_GENIbusCommandBuffer;

stCommandBuffer: Reference to the structure for communication (buffer) with the FB_GENIbusCommunication() function block.

Requirements