If the start register number and the data count are valid, but some of the registers to access are beyond the valid register range, only the data from the registers in the valid register range are read/written. The data count returned is the number of valid register data returned, and the error code 1280 Hex (end register number in out of range) is returned in the Module Status Word.

The following example tries to read 10 registers, using the GET command, from the ESI module starting at register 3FFA Hex:

User Logic command = 030A Hex

Start register = 3FFA Hex

Therefore, the data count is 10 and the 6 valid registers (3FFA, 3FFB,3FFC, 3FFD, 3FFE, and 3FFF Hex) data are returned. The data count returned in the Command Word is 6 (8306 Hex).