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| Field name | Type | Description | Versions |
|---|---|---|---|
| 104asdu.addr | Unsigned integer, 2 bytes | Addr | 1.2.0 to 1.6.5 |
| 104asdu.bitstring | Unsigned integer, 4 bytes | Object value | 1.6.0 to 1.6.5 |
| 104asdu.causetx | Unsigned integer, 1 byte | CauseTx | 1.2.0 to 1.6.5 |
| 104asdu.float | Floating point (single-precision) | Object value | 1.6.0 to 1.6.5 |
| 104asdu.ioa | Unsigned integer, 3 bytes | IOA | 1.2.0 to 1.6.5 |
| 104asdu.nega | Boolean | Negative | 1.2.0 to 1.6.5 |
| 104asdu.normval | Signed integer, 2 bytes | Object value | 1.6.0 to 1.6.5 |
| 104asdu.numix | Unsigned integer, 1 byte | NumIx | 1.2.0 to 1.6.5 |
| 104asdu.oa | Unsigned integer, 1 byte | OA | 1.2.0 to 1.6.5 |
| 104asdu.sq | Boolean | SQ | 1.2.0 to 1.6.5 |
| 104asdu.test | Boolean | Test | 1.2.0 to 1.6.5 |
| 104asdu.typeid | Unsigned integer, 1 byte | TypeId | 1.2.0 to 1.6.5 |
| iec104.asdu_asdunormval | Signed integer, 2 bytes | Object value | 1.4.0 to 1.4.11 |
| iec104.asdu_float | Floating point (single-precision) | Object value | 1.4.0 to 1.4.11 |