124 lines
7.8 KiB
Markdown
124 lines
7.8 KiB
Markdown
---
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manual: IM 36K10C40-01EN
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title: Engineering Module - Historical
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edition: 3rd Edition, Sep. 2023
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version: R1.03
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status: Event/Item, Scan/Time and Aggregation storage groups verified by quick load on CI-Eng-Sample 2026-10-01; ithloahis loading rules verified; Engineering Module forms, archive and retrieve from docs
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---
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# Engineering Module - Historical (R1.03)
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Item storage groups (*Configuration > Historisation > Item storage groups*), aggregation and
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archive in the Engineering Module, plus how history is read. History manager internals:
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`IM36K10L20-01EN.md`; storage processes: `IM36K10L35-01EN.md`. Section numbers refer to the
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manual; dataset fields were checked on the installed system.
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## 1. Historical database (§1)
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| Storage group kind | Dataset | Created by |
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|---|---|---|
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| Item storage groups | `ITEM_HISTORY` | the engineer, one per collection/storage type and schedule |
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| Alarm (`ALH`) | `ALARM_CHRONO` | system |
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| Audit (`ADT`) | `AUDIT_TRAIL` | system |
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| System log (`SYS_LOG`) | `SYS_LOG` | system |
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| Reports | report storage | system |
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Items are only stored after they are added to an item storage group (`ITEM_HIS_DF`, name
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`<group>:<item>`). Displays read history through the trend, alarm overview and report
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components.
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## 2. Item storage group (§2.1, dataset `HIS_GROUP_DF`)
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| Tab / field | `HIS_GROUP_DF` | Notes |
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|---|---|---|
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| Name | `NAME` | max 16 characters |
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| Type | `TYPE` | `Item` |
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| Node | `NODE` | cannot be changed later |
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| Exclude from archive | `EXCLUDE_ARCHIVE` | |
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| Activation / deactivation time | `START_TIME`, `STOP_TIME` | `STOP_TIME` in the future = stop then (used by `remove.cmd`, ISS-005) |
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| First rollover, interval | `FIRST_ROLLOVER`, `ROLLOVER_INT` (`"1 hours"`, `"1 days"`, `"1 weeks"`) | |
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| Correct for daylight saving | `CORRECT_DAYLIGHT` | data is stored in UTC |
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| Life time, warning time | `LIFE_TIME`, `WARN_TIME` | units older than the life time are deleted at rollover; warning if not archived |
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| Collection/storage type | `COL_STOR_TYPE` | `Scan/Time`, `Event/Event`, `Event/Item`, `Direct/Event`, `Direct/Item`, `Aggregation` |
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| Priority | `PRIORITY` | which group answers when an item is in several groups (highest wins; also source for aggregation) |
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| Data compression | `DATA_COMP` | doubles stored as singles (15 → 7 digits) |
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| Store quality code | `STORE_QUALITY` | |
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| Scan interval, averaging | `SCAN_INTERVAL` (s), `AVERAGING_METHOD` (None / Normal / Difference), `AVERAGING_INTERVAL` | Scan/Time only |
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| Samples per record | `SAMPLES_RECORD` (default 100) | Event/Item, Direct/* |
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| Fill old record | `FILL_OLD` | Direct/* only |
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| Aggregation periods | `AGG_PERIOD_30MIN`, `_HOUR` (always on), `_SHIFT`, `_DAY`, `_WEEK`, `_MONTH`, `_YEAR`; `AGG_SHIFT_START`, `AGG_SHIFT_LENGTH`, `AGG_DAY_START`, `AGG_WEEK_START`, `AGG_CORRECT_*_DST` | Aggregation only |
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| Completion notification item | `AGG_COMP_NOT_ITEM` | string item set to `"<GMT seconds>,<period>,<group>"`; period 2 hour, 3 shift, 4 day, 5 week, 6 month, 7 year, 8 30 min |
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Collection types: **Scan** (fixed interval, no buffering), **Event** (on change; needed for
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buffering and for migrating history to a CI Core), **Direct** (written by tools/applications).
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Storage types: **Time** (one record per scan time, predictable size), **Item** (one record per
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item with many samples), **Event** (one record per event; slow for many samples of one item).
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Item in a group (`ITEM_HIS_DF`): `NAME`, `ITEM_NAME`, `GROUP_NAME`; event triggers
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`ON_VALUE_CHANGE`, `ON_STATUS_CHANGE`, `ON_QUALITY_CHANGE`, `ON_OPTION_CHANGE`, `ON_EACH_UPDATE`,
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`ON_FIRST_UPDATE`, `ON_PASS_PIT`; extra values `STORE_VALUE`, `STORE_*_LIMIT`, `STORE_DEADBAND`;
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aggregates `STORE_AGG_MAX`, `_MIN`, `_AVG`, `_INTG` (+ `AGG_INTG_PERIOD` second/minute/hour/day),
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`_STDV`, `_CNT` (Boolean: times True), `_DIFF_SUM` (+ `AGG_DIFF_SUM_RANGE` rollover count,
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`AGG_DIFF_SUM_PERC` leap detection; for counters, more accurate than the integral).
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Typical: Real/Integer max, min, average, standard deviation, integral; Boolean counter;
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Integer counter totals differential summation.
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Aggregation quality (with *Store quality code*): 1000 × share of source values that were not
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offline (other bad statuses do not count). Weekly/monthly/yearly are built from daily values.
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`ithsag.sup` (aggregation process): `run_interval` (manual: *Heartbeat*, spreads the work,
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600 s), `buffer_size` 20, `event_timeout` 1 s, `gap_time` 2880 min, `max_sample_delay` 14400
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min, `max_open_files` 10, `queue_size` (installed **500** KB, manual default 200), `dif_sum_noise`.
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## 3. Verified behaviour (CI-Eng-Sample, 2026-10-01)
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- Loaded `CIENG_SCAN10S` (Scan/Time, 10 s) and `CIENG_AGG` (Aggregation, 30 min + hour) with
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`dssqld -i`, 0 errors. **They stored nothing until CI Server was restarted** (ISS-006); after
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the restart `TANK1.LEVEL` appeared every 10 s (`SAMPLE_TIME` 12:00:10, 12:00:20, …, status 9).
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- The first unit of a new Event/Item or Aggregation group is dated 2 days back (= `gap_time`);
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a Scan/Time group's first unit starts at creation.
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- Reading one group: add `GROUP_NAME = "<group>"` to the `ITEM_HISTORY` filter. Without it the
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rows of all groups holding the item are returned.
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- `ithloahis` into an Event/Item group: samples dated inside the active unit or a unit closed by a
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rollover were stored (a few seconds later); samples older than the first unit the storage
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process opened after the restart were dropped **without any message** (also with `-l`). The
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next unit's initial value then came from the dropped sample (ISS-038).
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- Aggregation (`CIENG_AGG`, 30 min + hour, `TANK1.LEVEL` max/min/avg): the aggregation ran
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(`%TLS_LOG_PATH%\ithsag.log`: *Aggregation Completed*, period type 8 = 30 min, 2 = hour) but stored
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nothing while the source item was in two groups of equal priority 0. After giving
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`CIENG_SCAN10S` priority 10 the 13:30–14:00 period gave max 77 / min 33 / average 52.7,
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quality 1000 (ISS-040). Filter values: `INTERPOLATION = "30Minutes"` (not "30 minutes"),
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`"Hour"`; `ATTRIBUTE = "Maximum"` etc. (`ithdbg` lists *Difference summation*).
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- Full sample remove/reload with all three groups: 0 errors.
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## 4. Archive (§2.2)
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1. Define the device in `has.sup` (tape, or a CD/DVD/disk path) and restart.
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2. *Historisation > Archive > Initialize storage medium* (label, e.g. the first date) — writes an
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ID file.
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3. *Archive > Automatic archive*: daily time; unarchived data is written then. Big archives
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need a scratch folder (`TEMPORARY-PATH` in `has.sup`).
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4. *Archive > Retrieve from archive*: period (whole archive runs only), group, keep-free disk
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space, life time of the restored data; mount the requested media. Restored data is used by
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reports and trends until its life time ends. (Known issue: alarm attribute databases are not
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restored, IM 36K01A50.)
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## 5. Reading history (§4)
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- Classes (`DSS_OPEN_ALL("ITEM_HISTORY", "r", r)`, `DSS_SET_FILTER`, `DSS_READ_NEXT`,
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`DSS_GET_FLOAT(…,"ITEM_VALUE",…)`), reports (`SELECT … FROM ITEM_HISTORY WHERE ITEM_NAME = …
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and INTERPOLATION = 'Hour' and ATTRIBUTE = 'Maximum' …`), ODBC (only remote way), C / .NET API,
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`dssqld`, and `ithloahis` for writing.
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- Aggregates are selected with `INTERPOLATION` (`Hour`, `Day`, `Month`, `Year`, …) and
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`ATTRIBUTE` (`Maximum`, `Minimum`, `Average`, `Integration`, `Standard deviation`,
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`Counter`, `Differential summation`).
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- `ithloahis -f <csv> [-v] [-l] [-i] [-s <section>] [-t GMT|LST|LCT]`: SCAN or EVENT files
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(skill `system-management`, task `load-history.md`).
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## 6. Troubleshooting (§5)
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`hisdbg` (3 unit info, 20 all groups, 21 group by name), `hisrep`, `hisrecover`, `isfrename`;
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archive: the `has.sup` status item and `hasdbg` (11 media, 8 overview, 10 delete a medium).
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Backup example (App. 1.4): `xcopy /E` of `%TLS_ROOT_PATH%\tls` and `%TLS_ALLUSERS_PATH%` into
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a dated folder (the manual does not say; stopping CI Server first gives a consistent copy).
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