Normal Operation - 1794-VHSC
Bits in the Status member are not named because they may have 3 different interpretations, depending on the module operating mode as described below.
The Status Word bit values and bit definitions depend on the state of the VHSC. There are three reporting states:
- Normal operation (Status LED-solid green)
- Incomplete, incorrect, or conflicting configuration (Status LED-flashing green)
- Hardware power up self-test error (Status LED-flashing red). Refer to1794-VHSC Hardware Power up Self-Test Errorsfor more information.
The ConfigurationError member of the AB:1794_VHSC:I:0 module-defined data type reflects a change in its members values any time incomplete, incorrect, or conflicting configuration data is sent to the module. Use the table below to understand the reasons for module’s condition.
Important: | If the controller is in Run mode and a bad configuration is sent to the 1794-VHSC module, the error flags are set in the Fault word in the Input tags and the green OK LED on the module will blink On and Off. The module, however, will continue to run with its previous good data. To avoid confusing the monitoring application, no live data is returned to the Logix Designer application. |
Status (Bit Definitions) | Meaning in this Context | Description |
Fault.0 | Ch0Zinput | Indicated present status of Z input for Channel 0. |
Fault.1 | Ch0ZeroFrequencyDetect | Used only when frequency configurations are selected. |
Fault.2 | Ch0StoredData2 | A rotating counter (along with next bit) which increments each time the stored/accum. |
Fault.3 | Ch0StoredData3 | Words are updated, resetting to zero on next count after 3 is reached. |
Fault.4 | Ch1Zinput | Indicated present status of Z input for Channel 1. |
Fault.5 | Ch1ZeroFrequencyDetect | Used only when frequency configurations are selected. |
Fault.6 | Ch1StoredData6 | A rotating counter (along with next bit) which increments each time the stored/accum |
Fault.7 | Ch1StoredData7 | Words are updated, resetting to zero on next count after 3 is reached. |
Fault.8 | Output0 | Output status indicator, 1=ON, 0=OFF. |
Fault.9 | Output1 | Output status indicator, 1=ON, 0=OFF. |
Fault.10 | Output2 | Output status indicator, 1=ON, 0=OFF. Output status indicator, 1=ON, 0=OFF. Fatal fault in hardware self-test. Indicates unconfigured status of module. Module's 24V DC power fault indication. |
Fault.11 | Output3 | |
Fault.12 | TestFail | |
Fault.13 | NotReady | |
Fault.14 | FieldPowerFault | |
Fault.15 | ConfigurationError | See Configuration Error section about meaning of the bits above when this bit is set. |
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