# `IEC60870.IO.System.TestCommand`
[🔗](https://github.com/Ultraluv/ex_iec60870/blob/main/lib/iec60870/io/system.ex#L57)

Test command (C_TS_NA_1, TypeID 104).

# `t`

```elixir
@type t() :: %IEC60870.IO.System.TestCommand{
  byte1: byte(),
  byte2: byte(),
  ioa: non_neg_integer(),
  valid: boolean()
}
```

# `new`

---

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