FB_READ_177_SNVT_sched_val

FB_READ_177_SNVT_sched_val 1:

This function-block receives the following LON-input-variables (nvi):

SNVT name: SNVT_sched_val.

SNVT number: 177.

SNVT description: Scheduler value. Index from a scheduler that selects an entry in a SCPT value definition array or is a direct value output.

VAR_INPUT

wNVIndex       : WORD;
bDisabled      : BOOL := FALSE;

wNVIndex: Unique Index. This is required for the binding of the LON nodes. Per LON terminal a maximum of 62 SNVTs are allowed. Values from 0 to 61 are permissible.

bDisabled: TRUE = disables the function block.

VAR_OUTPUT

byValue    : BYTE;
bNewData   : BOOL;
bError     : BOOL;
eError     : E_LON_ERROR;

byValue: Min: 0 / Max: 255.

bNewData: Is TRUE for one cycle once new data were received.

bError: The output becomes TRUE as soon as an error occurs. The error is described via the variable eError.

eError: The output issues an error code when an error occurs (see E_LON_ERROR). Simultaneously bError is TRUE.

VAR_IN_OUT

stLON_Com      : ST_LON_Communication;

stLON_Com: This structure connects FB_LON_KL6401() with the send/receive function blocks (see ST_LON_Communication).