Antivalent sensors (EP1819-0005)
The EP1819-0005 has a diagnostic function for antivalent sensors.
The diagnostic function is disabled in the factory setting.
Enabling diagnostics
- 1. Connect antivalent sensors as shown in the connection example in chapter M8 sockets, 4-pin.
- 2. Set the Predefined PDO Assignment "16DI with diagnostic".
See chapter Adapt process image (EP1819-0005, EP1839-0022, EP1839-0042). - The process data object "DIP Diagnosis" is enabled.
- 3. Set the CoE parameters 81n0:03 "Enable antivalent input diagnostic" of the corresponding connections to TRUE. See the following table.
Connection | CoE parameters |
|---|---|
X01 | 8100:03 |
X02 | 8110:03 |
X03 | 8120:03 |
X04 | 8130:03 |
X05 | 8140:03 |
X06 | 8150:03 |
X07 | 8160:03 |
X08 | 8170:03 |
Evaluation
In error-free operation, the outputs of an antivalent sensor provide inverted signals. If both outputs of the sensor deliver the same value, this is interpreted as an error. An error is signaled in two ways:
- Status LEDs. See chapter M8 sockets, 4-pin, section "Status LEDs".
- Status bits in the process data. See chapter Process image - EP1819-0005.