ci-server-engineer/knowledge/manuals/IM36K10C40-01EN.md

manual	title	edition	version	status
IM 36K10C40-01EN	Engineering Module - Historical	3rd Edition, Sep. 2023	R1.03	Event/Item and Scan/Time storage groups verified by quick load (Aggregation loads, values not yet seen — ISS-040) on CI-Eng-Sample 2026-10-01; ithloahis loading rules verified; Engineering Module forms, archive and retrieve from docs

Engineering Module - Historical (R1.03)

Item storage groups (Configuration > Historisation > Item storage groups), aggregation and archive in the Engineering Module, plus how history is read. History manager internals: IM36K10L20-01EN.md; storage processes: IM36K10L35-01EN.md. Section numbers refer to the manual; dataset fields were checked on the installed system.

1. Historical database (§1)

Storage group kind	Dataset	Created by
Item storage groups	ITEM_HISTORY	the engineer, one per collection/storage type and schedule
Alarm (ALH)	ALARM_CHRONO	system
Audit (ADT)	AUDIT_TRAIL	system
System log (SYS_LOG)	SYS_LOG	system
Reports	report storage	system

Items are only stored after they are added to an item storage group (ITEM_HIS_DF, name <group>:<item>). Displays read history through the trend, alarm overview and report components.

2. Item storage group (§2.1, dataset HIS_GROUP_DF)

Tab / field	HIS_GROUP_DF	Notes
Name	NAME	max 16 characters
Type	TYPE	Item
Node	NODE	cannot be changed later
Exclude from archive	EXCLUDE_ARCHIVE
Activation / deactivation time	START_TIME, STOP_TIME	STOP_TIME in the future = stop then (used by remove.cmd, ISS-005)
First rollover, interval	FIRST_ROLLOVER, ROLLOVER_INT ("1 hours", "1 days", "1 weeks")
Correct for daylight saving	CORRECT_DAYLIGHT	data is stored in UTC
Life time, warning time	LIFE_TIME, WARN_TIME	units older than the life time are deleted at rollover; warning if not archived
Collection/storage type	COL_STOR_TYPE	Scan/Time, Event/Event, Event/Item, Direct/Event, Direct/Item, Aggregation
Priority	PRIORITY	which group answers when an item is in several groups (highest wins; also source for aggregation)
Data compression	DATA_COMP	doubles stored as singles (15 → 7 digits)
Store quality code	STORE_QUALITY
Scan interval, averaging	SCAN_INTERVAL (s), AVERAGING_METHOD (None / Normal / Difference), AVERAGING_INTERVAL	Scan/Time only
Samples per record	SAMPLES_RECORD (default 100)	Event/Item, Direct/*
Fill old record	FILL_OLD	Direct/* only
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
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

Collection types: Scan (fixed interval, no buffering), Event (on change; needed for buffering and for migrating history to a CI Core), Direct (written by tools/applications). Storage types: Time (one record per scan time, predictable size), Item (one record per item with many samples), Event (one record per event; slow for many samples of one item).

Item in a group (ITEM_HIS_DF): NAME, ITEM_NAME, GROUP_NAME; event triggers ON_VALUE_CHANGE, ON_STATUS_CHANGE, ON_QUALITY_CHANGE, ON_OPTION_CHANGE, ON_EACH_UPDATE, ON_FIRST_UPDATE, ON_PASS_PIT; extra values STORE_VALUE, STORE_*_LIMIT, STORE_DEADBAND; aggregates STORE_AGG_MAX, _MIN, _AVG, _INTG (+ AGG_INTG_PERIOD second/minute/hour/day), _STDV, _CNT (Boolean: times True), _DIFF_SUM (+ AGG_DIFF_SUM_RANGE rollover count, AGG_DIFF_SUM_PERC leap detection; for counters, more accurate than the integral). Typical: Real/Integer max, min, average, standard deviation, integral; Boolean counter; Integer counter totals differential summation.

Aggregation quality (with Store quality code): 1000 × share of source values that were not offline (other bad statuses do not count). Weekly/monthly/yearly are built from daily values.

ithsag.sup (aggregation process): run_interval (manual: Heartbeat, spreads the work, 600 s), buffer_size 20, event_timeout 1 s, gap_time 2880 min, max_sample_delay 14400 min, max_open_files 10, queue_size (installed 500 KB, manual default 200), dif_sum_noise.

3. Verified behaviour (CI-Eng-Sample, 2026-10-01)

• Loaded CIENG_SCAN10S (Scan/Time, 10 s) and CIENG_AGG (Aggregation, 30 min + hour) with dssqld -i, 0 errors. They stored nothing until CI Server was restarted (ISS-006); after the restart TANK1.LEVEL appeared every 10 s (SAMPLE_TIME 12:00:10, 12:00:20, …, status 9).

• The first unit of a new Event/Item or Aggregation group is dated 2 days back (= gap_time); a Scan/Time group's first unit starts at creation.

• Reading one group: add GROUP_NAME = "<group>" to the ITEM_HISTORY filter. Without it the rows of all groups holding the item are returned.

• ithloahis into an Event/Item group: samples dated inside the active unit or a unit closed by a rollover were stored (a few seconds later); samples older than the first unit the storage process opened after the restart were dropped without any message (also with -l). The next unit's initial value then came from the dropped sample (ISS-038).

• Aggregation: CIENG_AGG (30 min + hour, LEVEL max/min/avg) loaded, units and extra …zzz… files created, but no aggregate appeared in ITEM_HISTORY between the 12:00 restart and 13:00 (level varied 40–70 from 12:06 to 12:11; ithsag running, no message) — ISS-040. INTERPOLATION = "Hour" is a valid filter value; "30 minutes" is refused.

• Full sample remove/reload with all three groups: 0 errors.

4. Archive (§2.2)

1. Define the device in has.sup (tape, or a CD/DVD/disk path) and restart.
2. Historisation > Archive > Initialize storage medium (label, e.g. the first date) — writes an ID file.
3. Archive > Automatic archive: daily time; unarchived data is written then. Big archives need a scratch folder (TEMPORARY-PATH in has.sup).
4. Archive > Retrieve from archive: period (whole archive runs only), group, keep-free disk space, life time of the restored data; mount the requested media. Restored data is used by reports and trends until its life time ends. (Known issue: alarm attribute databases are not restored, IM 36K01A50.)

5. Reading history (§4)

• Classes (DSS_OPEN_ALL("ITEM_HISTORY", "r", r), DSS_SET_FILTER, DSS_READ_NEXT, DSS_GET_FLOAT(…,"ITEM_VALUE",…)), reports (SELECT … FROM ITEM_HISTORY WHERE ITEM_NAME = … and INTERPOLATION = 'Hour' and ATTRIBUTE = 'Maximum' …), ODBC (only remote way), C / .NET API, dssqld, and ithloahis for writing.
• Aggregates are selected with INTERPOLATION (Hour, Day, Month, Year, …) and ATTRIBUTE (Maximum, Minimum, Average, Integration, Standard deviation, Counter, Differential summation).
• ithloahis -f <csv> [-v] [-l] [-i] [-s <section>] [-t GMT|LST|LCT]: SCAN or EVENT files (skill system-management, task load-history.md).

6. Troubleshooting (§5)

hisdbg (3 unit info, 20 all groups, 21 group by name), hisrep, hisrecover, isfrename; archive: the has.sup status item and hasdbg (11 media, 8 overview, 10 delete a medium). Backup example (App. 1.4): xcopy /E of %TLS_ROOT_PATH%\tls and %TLS_ALLUSERS_PATH% into a dated folder (the manual does not say; stopping CI Server first gives a consistent copy).