Specific Node Element Qualifier (SNEQ)
The sequence number indicator field (bits 3-4 of the flags byte)
contains a code of X'01' to indicate that the sequence number in the
SNEQ may not be the sequence number of the processor complex. The
first 4 bytes of the sequence number field are used for nonsequenced
number purposes. See Table 1
All FICON® CTC devices for every FICON CTC channel on a processor complex share the processor complex's sequence number; the last 7 bytes of which are stored in the last 7 bytes (bytes 23-29) of the sequence number field.
The information in bytes 18-21 and bytes 30-31 are needed to make FICON CTC devices SNEQ-unique to an operating system.
Programs sending Read Configuration Data commands to either side of an FICON CTC device receive the same NED data.
The SNEQ has the following format:
| Word | SNEQ Format | |||
|---|---|---|---|---|
| 0 | Flags | Reserved | ||
| 1 | Type Number | |||
| 2 | Type Numbers (c) | Model Numbers | ||
| 3 | MN (c) | Manufacturer | ||
| 4 | Plant of Mfg. | Sequence Number | ||
| 5 | Sequence Number (c) | |||
| 6 | Sequence Number (c) | |||
| 7 | Sequence Number (c) | Tag | ||
- Flags
- X'40'
- Reserved
- X'000000'