F93_UNIT

Redundant instruction

NOTE

This is a redundant instruction. It is replaced by: FP_UNIFY_DIGITS

Extracts each lower 4 bits (bit position 0 to 3) starting with the 16-bit area specified by s and combines the extracted data into 1 word if the trigger EN is in the ON-state. The result is stored in the 16-bit area specified by d.

Parameters

Input

s (WORD): starting 16-bit area to be extracted (source)
n (INT): specifies number of data to be extracted

Output

d (WORD): 16-bit area for storing combined data (destination)

Remarks

Instead of using this F instruction, we recommend using the corresponding FP7 instruction: FP_UNIFY_DIGITS

n specifies the number of data to be extracted. The range of n is 0 to 4.

The programming example provided below can be envisioned thus:

(1) Source
(2) Bit position
(3) Array[0] at d
(4) Array[1] at d
(5) Array[2] at d
(6) start: ON
(7) Destination: ON
(8) Value at d
(9) Bit positions 12 to 15 are filled with 0s.

Error flags

sys_bIsOperationErrorHold (turns to TRUE and remains TRUE)

if the area specified using the index modifier exceeds the limit
if the value at n³ 5

sys_bIsOperationErrorNonHold (turns to TRUE for one scan)

if the area specified using the index modifier exceeds the limit
if the value at n³ 5