cliu ef543cde20 Add phase 5 Engineering Module summary, authorization skill, item tests

- Summary of IM 36K10C10 (Engineering Module - I/O Processes), checked
  against dssana.sup, itm.sup and the default datasets
- New skill authorization: users and authorization groups by quick load
- item-engineering: string item limits (1-200, holds length - 1) and the
  integration granule (itm_int_secs), both tested on CI-Eng-Sample
- CI-Eng-Sample: read-only authorization group CIENG_VIEWER
- Closed ISS-001 (uoff/ublk option bits), ISS-010, ISS-019; new ISS-018, ISS-020

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2026-09-30 17:09:45 +10:00

2.6 KiB

Raw Blame History

task	version	source	status
Read and write item values with itmval	R1.03	IM 36K10J10-01EN §2.9.2; practiced on the test system and CI-Eng-Sample 2026-09-30	verified

Read and write item values (itmval)

Needs CI Server running. Reading is read-only. Writing changes live data: follow the user's chosen way of working (direct vs prepare only) and never write to an item that drives real equipment without explicit approval.

Item names are full paths: <Section>.<Sub-section>.<Tag>, e.g. CI-Eng-Sample.TANK1.INFLOW from the sample project.

Read the current value

itmval -g -n <Section>.<Tag>

Output:

Value   = 130
Status  = 9
Options = 0xffffff88.00 ack
Quality = 0

Status is a number from STATUS_DF (export it with dssqld -e status_df.qli -d STATUS_DF -c to look numbers up). Common ones: 9 NORMAL, 13 NOT INIT (never written; new items start here), 4 / 5 BOOLEAN 0 / BOOLEAN 1, 11 HIGH HIGH.
Options lists item flags as words after the hex value (option bits, IM 36K10C10 §3.5): blk 1 blocked, off 2 offline (station not communicating), uoff 4 updated offline (written by an application such as itmval while offline), ack 8 acknowledged, ublk 16 updated blocked (written while blocked, e.g. with -o); 32/64 direct/delayed alarm. So writing a station item whose station is down adds uoff (0x…8a → 0x…8e); internal items (no station) never get it.

Read limits

itmval -g -n <Section>.<Tag> -a <n>

<n>: 1 deadband, 2 low, 3 high, 4 low-low, 5 high-high. The limit is returned in Value. Items with no limits configured return ITM-E-WRONG_ATT, Wrong attribute number used.

Write a value

itmval -p -n <Section>.<Tag> -v <value> [-s <status>] [-q <quality>]

Read the item first and note its value, so it can be restored.
Booleans take -v 0 / -v 1; the status follows automatically (4 / 5).
-s sets the status explicitly (e.g. -s 9 NORMAL). Without it, a numeric write gives 9.
-o overwrites a blocked item; -t [<date>] <time> [GMT|LST] sets the timestamp (default local civil time); -e writes to event history only, not the current value.
Read it back to confirm.

Verified examples (CI-Eng-Sample)

Command	Result
`itmval -p -n CI-Eng-Sample.TANK1.INFLOW -v 120.5`	Value 120.5, status 9
`itmval -p -n CI-Eng-Sample.TANK1.INFLOW -v 130 -s 9`	Value 130, status 9
`itmval -p -n CI-Eng-Sample.PUMP1.RUNNING -v 1`	Value 1, status 5 (BOOLEAN 1)
`itmval -g -n CI-Eng-Sample.TANK1.LEVEL -a 2` / `-a 3` / `-a 4` / `-a 5`	20 / 80 / 10 / 90

2.6 KiB Raw Blame History