Programming instructions

13.15 EXERCISE FX2N-5A Module Access

The FX3U demo cases have installed an FX2N-5A analog module. Write the

TO/FROM instructions required to communicate to this module and populate the

data fields as shown on the GOT screen. The list of buffer memories for the

FX2N-5A module can be found in the FX2N-5A Hardware Manual.

NOTE: the averaging times value from the GOT should be written to all 4

averaging times values in the module.

13.16 Shift Registers

The FX3U contains numerous commands for shifting bits within a word or words

within a table. There are commands to shift bits or words to the left or right. The

size of the data in the shift, size of data to be shifted, as well as the source for

the original and data to shift in can all be defined.

SFTL – Bit Shift Left

SFTR – Bit Shift Right

The Bit Shift Left and Bit Shift Right commands will move bits within a word (or

multiple words). The command takes 4 parameters. The first parameter is the

location of the data to be shifted into the register(s). The second parameter is

the first address of the shift data. The third parameter is length of the shift data.

The fourth parameter is the number of bits left or right to shift the data.