An OWEN PR200 universal input configured for discrete operation can appear correct in simulation and service mode yet remain a real-valued signal in the application. The reported symptom is approximately when +24 V is applied, even though the configured state bands are 0...5 V for zero and 10...24 V for one. The evidence points to an input-type or project-translation problem rather than an incorrect threshold.
Identify the Type Mismatch
Inspect the signal line connected to the input in OWEN Logic. A line that remains purple is being handled as a real-valued analog signal; a black line indicates a Boolean discrete signal. If the input is configured as discrete but its line remains purple, do not treat the tiny online value as a valid voltage measurement—the project is not representing the input with the expected Boolean type.
| Observation | Expected interpretation | Decision |
|---|---|---|
| Simulation changes the logic correctly | Downstream Boolean logic can operate | Continue checking the compiled input type and hardware path |
| Service mode changes from zero to one | The controller detects the field-input state | Focus on project configuration or translation |
Online value is about at +24 V
|
The application is not receiving the expected Boolean representation | Check line type and OWEN Logic version behavior |
Verify Wiring and Input Configuration
Connect the positive field signal to the selected universal input and connect the supply negative to the adjacent COM. The reported installation already produced correct state changes in service mode, so wiring was not the leading cause in that case. Confirm it independently before changing software.
- Open the universal-input configuration and select discrete mode for each affected channel.
- Confirm the configured state bands: zero at
0...5 Vand one at10...24 V. - Save and close the project, restart the engineering computer, and reopen the project.
- Inspect the input lines. In discrete mode they must be black Boolean lines, not purple real-value lines.
- Download the rebuilt project to the PR200 only after the line types are correct.
Check for an OWEN Logic Regression
Evidence from OWEN Logic 2.11.370.0 shows that changing an input from analog to discrete also changes its line from purple to black, without requiring TO_BOOL. Reports that newer software does not make this change support a software-regression hypothesis, but the affected newer version and firmware range are not identified.
If the reopened project still shows a purple line, reproduce the configuration in 2.11.370.0 and compare the generated line type. Coordinate any OWEN Logic or PR200 firmware rollback through the manufacturer's official support process because the evidence does not establish compatible firmware versions. Using TO_BOOL may mask the type mismatch; it is not required in the documented older behavior when the input is genuinely configured as discrete.
Verify the Corrected Project
Test the same channel at three levels. First, confirm that simulation toggles the downstream logic. Second, verify in service mode that the physical input changes from zero to one when +24 V is applied. Third, use online debugging to confirm that the program receives a Boolean state rather than approximately . Repeat the test for every affected input because the evidence inconsistently labels the channels as A0/A1 and A1/A2.
FAQ
The reported project retained a real-valued input representation instead of delivering the expected Boolean state. Check whether the signal line is purple rather than black and rebuild the project after correcting the input mode.
Does a PR200 universal input need TO_BOOL in discrete mode?
Not in the observed OWEN Logic 2.11.370.0 behavior: selecting discrete mode changes the line to a black Boolean signal. Requiring TO_BOOL indicates that the input may still be represented as analog.
How do I verify PR200 universal-input wiring for 24 V?
Apply the positive signal to the selected universal input and connect the supply negative to the adjacent COM. Then confirm a zero-to-one transition in service mode before diagnosing the application project.
