Error recovery procedure (ERP) FM header
The following table shows the format of the ERP FM header.
| Byte | Bits | Name | Contents |
|---|---|---|---|
| 0 | FMHL | Length | |
| 1 | 0 | FMHC | |
| 1-7 | FMHTYPE | X'07' | |
| 2-5 | ERPSENSE | SNA sense code that would appear on error response | |
| 6-7 | ERPSEQ | Sequence number of chain for which error was detected |