Normal Operation Detection
The NOX monitoring of the EasyNOₓ provides two modes for normal operation detection:
- Load
In this mode, the NOX monitor detects normal operation when the engine to be monitored reaches a specific load that can be set in the NOX monitor. For this purpose, the NOX monitor can evaluate the analog load signal of a master control that is connected to the CAN bus module of the EasyNOₓ system, to the optional I/O communication module BPlus or to a suitable I/O module supporting device profile CiA® 401 or CiA® 404.
Alternatively, the NOX monitor can use the manifold pressure as an indicator for the engine load. For this purpose, a pressure sensor can be connected directly to the CAN bus module of the EasyNOₓ system or alternatively the signal of a pressure sensor can be forwarded to the CAN bus module via the control cabinet. The manifold pressure threshold for normal operation detection can be configured.
In conjunction with the optional I/O communication module BPlus or a suitable I/O module supporting device profile CiA® 401 or CiA® 404, there is also the option of a master control releasing normal operation via the binary input of the I/O module (see section Binary Inputs).

- Load and Temperature
As an additional condition, you can configure that a specific exhaust gas temperature must be reached at the catalyst outlet in order for normal operation to be detected on the engine to be monitored. For engines with two catalytic converters in split exhaust gas lines, this condition must be met in both exhaust gas lines. If the exhaust gas temperature falls 20 °C (68 °F) below the configured value, the NOX monitor interprets this as an exit from normal operation.

The status of the normal operation detection is displayed in the NOX Monitoring view of the EasyNOₓ (see section Overview). You can configure the normal operation detection in the NOX Setup view (see section Preferences).