# `EtherCAT.Bus.Result`
[🔗](https://github.com/sid2baker/ethercat/blob/main/lib/ethercat/bus/result.ex#L1)

Result of a single EtherCAT datagram round-trip.

Results are returned in the same order as commands were added
to the transaction.

## Fields

  * `data` — response payload (binary)
  * `wkc` — working counter (raw, caller interprets)
  * `circular` — `true` if the frame circulated (ring break indicator, spec §3.5)
  * `irq` — AL event request bitmask (2-byte little-endian binary),
    ORed across all slaves the datagram passed through (spec §12)

## Example

    {:ok, [%Result{data: <<status::16-little>>, wkc: 1}]} =
      Bus.transaction(bus, Transaction.fprd(0x1001, Registers.al_status()))

# `t`

```elixir
@type t() :: %EtherCAT.Bus.Result{
  circular: boolean(),
  data: binary(),
  irq: &lt;&lt;_::16&gt;&gt;,
  wkc: non_neg_integer()
}
```

---

*Consult [api-reference.md](api-reference.md) for complete listing*