MSTR Block Data Area Format
The format of the MSTR block data area is:
| Word 0 | Zero |
| Word 1 | Zero |
| Word 2 | Zero |
| Word 3 | Address of the point to be updated. Valid values are: 1 - 8192 for Coils 10001 - 18192 for Discrete Inputs 3001 - 39999 for Input Registers 4001 - 49999 for Holding Registers |
| Word 4 | Number of bytes of point data being sent. Valid values are 1-190. |
| Word 5 through Word 99 | Point data |