Resolve the control object
Normalize the selected reference and verify the Data Object boundary before staging an action.
Control-model-aware validation · explicit guardrails
Control the intended object through the sequence the live IED requires.
ARSAS does not translate a button label into a blind write. It reads the live control model, resolves the command structure, stages the supported Direct or Select-Before-Operate sequence and presents service, termination, timing, error and feedback evidence.
Direct + SBONormal and enhanced security control models
Live descriptorsNamed ctlVal binding from actual MMS types
Typed familiesDPC, SPC, INC/ISC, BSC and APC
Visible outcomeService, termination, error, timing and feedback
Discovery before dispatch
The command panel is the final step of model resolution.
A semantic action becomes available only when the live evidence can represent the command without positional guessing or a generic write fallback.
Read ctlModel
Determine Direct or SBO and normal or enhanced completion handling from the live model.
Inspect command descriptors
Retrieve Oper, SBOw and optional Cancel types and locate the named ctlVal field.
Bind semantic intent
Represent Open, Close, Boolean, Raise, Lower, counter or setpoint through the discovered live type.
Execute one supported sequence
Preserve origin, ctlNum, timestamp, Test, interlock and synchrocheck values throughout the staged command.
Record completion evidence
Present service results, CommandTermination, ControlError, AddCause, elapsed time and mapped process feedback.
Supported semantic families
Readable engineering actions with type-aware wire handling.
Position / DPC
Open and Close actions with command encoding and process feedback treated as separate evidence.
Boolean / SPC
True and False actions represented through the discovered single-point command structure.
Pulse / BSC
Raise and Lower semantics for supported binary step command types.
Counter / INC or ISC
Typed integer values when the live descriptor is complete and usable.
Setpoint / APC
Explicit value entry and type-aware binding for supported analog control objects.
Per-command checks
Test, interlock and synchrocheck requests remain attached to the exact staged command.
Protocol completion and process response
- Detected control model and selected sequence
- Confirmed MMS service result
- Positive or negative CommandTermination
- ControlError, AddCause and LastApplError where available
- Control number, origin, request flags and timing
- Mapped process feedback where available
Protocol readiness is not switching authority
- Two-step confirmation for Open and Close
- No generic command-write fallback
- Commands disabled when live descriptors are incomplete
- Negative outcomes remain visible
- Isolation, authorization and independent verification remain external requirements
Validation first
Exercise every supported control model before energized commissioning.
Validate positive and negative termination, interlock and synchrocheck rejection, Test mode, timeout, Cancel behavior, association loss, competing-client ownership and process feedback in an approved environment.
Verified stable release
Download ARSAS 1.6.17 for Windows.
Use the installer for a normal workstation, choose the portable ZIP for a controlled folder deployment, and verify the published SHA-256 before use.
What’s new, limitations and signing status →