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Modules can be configured in RUN mode using programming software or the control program. This allows you to change configuration while the system is operating. Lower filter settings provide greater noise rejection and resolution. Higher filter settings provide faster performance. Each channel of the output module can be individually configured to hold its last value or assume a user-defined value on either a run-to-program or run-to-fault condition.
This feature allows you to set the condition of your analog devices, and therefore your control process, which may help to ensure a reliable shutdown. This feature provides feedback to the controller that a field device is not connected.
This allows you to specify corrective action based on the channel condition. Analog modules have single-ended inputs while isolated analog and temperature modules have differential inputs.
Single-ended voltage sensors reduce costs. Differential inputs are more expensive, but are typically more noise immune. This eliminates the need to test values in the control program. While standard analog modules have limited diagnostics, temperature and isolated analog modules provide over-range, under-range, and wire-off diagnostics with alarm bits.
This eliminates the need to scale the data in the user program. User calibration is recommended yearly for isolated analog and temperature modules. All modules come factory calibrated.
Allen-bradley 1794-OE4 Series B Manuals