data - may be a 16-bit integer constant or variable.
addr - EEPROM address (1-2000 in i-TRiLOGI). Actual PLC

This command  stores a 16-bit integer datas in the user’s definable EEPROM or FRAM address "addr"  for non-volatile storage. The actual PLC may have less EEPROM space. Please refer to your PLC’s reference manual for the upper limit.

If you attempt to save a 32-bit data, only the lower 16-bit will be saved. To save the entire 32-bit data, then:

1. If your PLC firmware is < r78, then  save the upper 16-bit using the GETHIGH16( ) function and the lower 16-bit directly in two separate locations.

2. If your PLC firmware is >= r78, use SAVE_EEP32 command to save 32-bit variable to the EEPROM/FRAM space.

Byte, Word and Long Word Addressing:   Note that the EEPROM space for 8-bit, 16-bit and 32-bit SAVE_EEPXX and LOAD_EEPXX command are the same space and they are mapped as shown below

If you intend to use the EEPROM/FRAM space to store more than 1 type (8, 16 or 32-bit) of data then you must properly manage the EEPROM/FRAM data space reserved for storing each type of data  so that they don't overwrite each other address space.  The easiest way is always to reserve enough space for 32-bit data, followed by space reserved for 16-bit and/or 8 bit data.

E.g. If you have 6000 words (16-bit) of FRAM space - this means you have space for storing 6000*2 = 12000 bytes of 8-bit data and you only have 6000/2 = 3000 long words for storing 32-bit data.

Now assume that your program needs to store up to 500 x 32-bit data and the balance for storing 8 bit data.

If you reserve 500 long words for 32-bit data, that means you are using up 500*4 = 2000 bytes of the FRAM space. This leaves you 12000 - 2000 = 10000 bytes of FRAM space for storing 8-bit data starting from byte address space 2001 to 12000.