Digitalinputsoutputs
Download as PPT, PDF
1 like99 views
Digital inputs and outputs can be controlled through various logic priorities. The highest priority is direct control, followed by demand, timer, and time-of-use controls. Outputs default to an always-on state, and the control logics determine when to turn them off. Inputs can be configured for different functions like event monitoring, pulse counting, or interfacing with energy meters. Both inputs and outputs can be inverted, filtered, or controlled through timers and other functions.
Digitalinputsoutputs
- 1. Digital Inputs & Outputs Carlos Tangerino December, 2010
- 2. Schneider Electric 2- Division - Name Date Basic concept By default, the outputs are always ON The control logic only turn outputs to OFF condition If one of the logics decides for turn the output OFF, the final state will be OFF One output respect the logics priorities One or more outputs respect the priorities among them Loads with same priority must use round-robin scheduling
- 3. Schneider Electric 3- Division - Name Date Fixed Logic, variable Atributes The physical state of a control device (ex.: relay) Depends on the physical contacts connections or device model ON state means The energy is available for this output Control atributes AUTO Indicated if the state of an output is controlled by the system or by the user. (0=MANUAL, 1=AUTO) FORCE If AUTO mode is off, this flag indicates the forced state. (0=Force OFF, 1=Force ON) DEMAND Output state from the demand control logic. (0=OFF, 1=ON) TIMER Output state from the time control logic (0=OFF, 1=ON) TOU Output state from the time of use control logic. (0=OFF, 1=ON) INVERTION Command to invert the output state (0=Not Inverted, 1=Inverted)
- 4. Schneider Electric 4- Division - Name Date Control Priorities One output may be controlled by more than one internal logic The decision for a such state follow the priority list as: Lowest priority Demand control Timer control TOU control Bypass Highest priority
- 5. Schneider Electric 5- Division - Name Date Control Logic DEMAND TIMER TOU AUTO FORCE INVERTION OUTPUT
- 6. Schneider Electric 6- Division - Name Date Advanced Output DirectDirect TONTON TOFFTOFF Output same as input Timer ON Timer OFF T T We can create many ways to control the output. Worth it? Timers Tempo m鱈nimo OFF Tempo m鱈nimo ON Tempo m叩ximo OFF Pausa ap坦s ON Pausa ap坦s OFF
- 7. Schneider Electric 7- Division - Name Date Control Functions SH SL POFF PON Demand ON OFF Time SH Setpoint High SL Setpoint Low POFF pause after OFF PON Pause after ON Output
- 8. Schneider Electric 8- Division - Name Date Digital Input Physical Interface RAW INPUT DEBOUNCE FILTER DIGITAL INPUT To Application OPEN CLOSE T
- 9. Schneider Electric 9- Division - Name Date Digital Input Type Always open Force condition Always close Force condition Direct input Same state as the input Inverted input The state is inverted Count on close Increment the counter value on close transition Count on open - Increment the counter value on open transition Count on change - Increment the counter value on any change Toggle Change state on close The input type selection depend on the behavior of the connected device
- 10. Schneider Electric 10- Division - Name Date Digital Inputs - Application The digital inputs can be used isolated or in group One isolated digital input may be used as: Event monitoring Alarm monitoring KYZ control (TOU, EOI) One or more digital inputs may be combined to interface pulse energy meters. Ex: Input 1 kWh pulse - received Input 2 kVArh pulse - received Input 3 kWh pulse delivered Input 4 kVArh pulse delivered Input 5 EOI pulse Input 6 TOU pulse (off-peak) Mixed mode as pulse counter and trip detection at same input