Mitsubishi Electric MELSEC iQ-F FX5 Programming Manual page 158

Operation error
Error code Remarks
(SD0/SD8067)
2820H The (n2) points of data starting from the device specified by (s) exceed in the corresponding device.
The (n1) points of data starting from the device specified by (d) exceed in the corresponding device.
2821H The transfer source data (s) overlaps with shift device (d).
3405H A constant other than K0 or K1 is specified when the constant (s) is specified.
The values specified in (n1) and (n2) are such that (n1)<(n2).
6 SEQUENCE INSTRUCTIONS
156
6.4 Shift Instructions