ACCESS_LEVEL_CHECK
Authority check with session and idle-timeout supervision: the logged-in user's level is compared against the level the action requires.
When to use it
Use ACCESS_LEVEL_CHECK when an action in the control system is restricted to a role — clearing an alarm, entering a manual value, changing a mode, starting a phase — and the controller has to withhold it from anyone below that level, including from a terminal left logged in and unattended.
Interface
The published port signature. This is the whole of what the block exposes to your program — the implementation body is not shown here and ships with the download.
Inputs
| Port | Type |
|---|---|
| ENABLE | BOOL |
| USER_REF | STRING |
| USER_ROLE | USINT |
| REQUIRED_ROLE | USINT |
| SESSION_OK | BOOL |
| ACTIVITY | BOOL |
| IDLE_TMO | TIME |
| RELOGIN_TMO | TIME |
| ACK | BOOL |
Outputs
| Port | Type |
|---|---|
| AUTHORIZED | BOOL |
| DENY_CODE | USINT |
| IDLE | BOOL |
| ALM_DENIED | BOOL |
| DENY_COUNT | UDINT |
| ALM_CFG_ERR | BOOL |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 7
- Simulated scans
- 123
- Simulator
- v0.1.0
Complete IEC 61131-3 implementation with a published test suite that runs on the vplant simulator. The counts above are that suite, executed on this build.
- Conforms to IEC 61131-3
- Conforms to IEC 61499
Download ACCESS_LEVEL_CHECK — free
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