FYI, you'll have better luck including the PLC model type in the future.
I looked up the PLC /instruction matrix for the LDIF instruction, and it's only valid for DL06, DL260, DL435, DL440, DL450. All of these are addressed in octal format. (This is important to deciphering the data)
Let's break it down into it's component parts.
[LDIF X0 K12] Load Immediate Formatted
This loads the group X0 - X13 (12 bits long, starting at X0 [Octal addressing, so X0 - X7 , X10 - X13]) and packs it into the accumulator. The Instruction help isn't real clear here, but I take "Immediate" to mean the same as "Interrupt" and "synchronous", meaning that any changes in the source data are ignored, once the instruction is in process.
[BCD] Binary to BCD conversion
This converts the BIN value in the Accumulator to BCD, and stores it in the Accumulator.
[LDIF X14 K4] Load Immediate Formatted
Since there's already data in the accumulator from the first LDIF, this will push the current Accumulator value to the first stack of the Accumulator, and stores the value of group X14 - X17 in the Accumulator.
[OUTX V2500] OUT Indexed
This takes the 16-bit value from the first level of the accumulator stack and copies it to an indexed address based on the Accumulator. So, our BCD converted X0 - X13, is copied into the address V(2500 + the HEX value of X14-X17)
In short, it looks like it's multiplexing data into the V memory.
However, I'm not sure why there's a for next loop around it since the offset is based on physical input data.