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# EIHIST - Field History

The Field History file contains one record per field per screen per day. Each record stores the displayed value and the update time.

| Template: |
| IOLIST: | 0999 EIHIST: IOLIST HI0$, HI1$, HI1, HI2$, HI3$, HI4$
| String Sizes: | DIM HI0$(20), HI1$(30), HI2$(5), HI3$(4), HI4$(1)

Key Definitions

| Key Number | Field | Description
| 0 | [1:1:20] | Save Date/Time/Field ID
| 1 | [1:13:8] + | Field ID +
|  | [1:1:12] | Save Date/Time
|  | __________ |
|  | 3 segments |

Field History

| File Name: | EIHIST | Record Size: | 73(128)
| File Type: | Mkeyed - Dynamic | Number of Keys: | 2

| Field | Field Name | Variable | Description | A/N | Length | Note
| 1(1,7) | SAVDAT | HI0$(1,7) | Save Date | A | 7 | Julian
| 1(8,5) | SAVTIM | HI0$(8,5) | Save Time | A | 5 | HH:MM
| 1(13,8) | FIELDID | HI0$(13,8) | Field ID | A | 8 |
| 2 | VALUE | HI1$ | Value | A | 30 |
| 3 | LCALD | HI1 | Last Calculated Date | N | 7 | Julian
| 4 | LCALT | HI2$ | Last Calculated Time | A | 5 | HH:MM
| 5 | LCALTRM | HI3$ | Last Calculated Terminal | A | 4 | Txxx
| 6 | LCALE | HI4$ | Last Calculated Error Type | A | 1 | " " = OK
|  |  |  |  |  |  | E = Calc error
|  |  |  |  |  |  | ? = Setup error
|  |  |  |  |  |  | - = Interface
|  |  |  |  |  |  | * = Mask Error