User Guide - Eurotherm Ltda

nanodac RECORDER/CONTROLLER: USER GUIDE4.12 DIGITAL I/OThis area of configuration allows the digital I/O types to be selected.Notes:1. If 2A2B is set to ‘Valve Raise’, then 3A3B is set to ‘Valve Lower’. Similarly, if relay 4AC is set to‘Valve Raise’, then relay 5AC is set to ‘Valve Lower’.When the loop channel output is wired to the PV input of a Valve Raise function, then the PV inputof the associated Valve Lower function becomes unavailable for wiring, and both outputs are controlledby the loop as a pair, using only the single wire.2. See section B2.6.11 for a description of time proportioning.Note: These fields do notappear if they contain I/Otype ‘DC output’.Select configuration menuInstrument 1A1BNetwork 2A2BGroup LALC (Dig.In)Channel 3A3BVirtual Channel LBLC (Dig.In)Loop 4AC (Relay)Digital I/O 5AC (Relay)Figure 4.12 Digital I/O top level menu4.12.1 Digital input/outputThis applies to signals at terminals 1A/1B (figure 2.2). Highlight ‘1A1B’, then operate the scroll key to revealthe configuration menu.Module Ident Dig IOTypeOn Off O/P, Time Prop O/P or Contact I/P (default)PV For inputs, 0 = contact is open; 1 = contact is closed. For On Off O/P, a value ≥ 0.5drives the output high, otherwise, the output is driven low. For Time Prop O/P, the valueis the demanded output %.Min On Time For Type = Time Prop O/P only, this allows a minimum on time to be specified. Configurablerange = 0.1 to 150 secondsInvertInverts the output sense for digital outputs; or the input signal for digital inputs.OutputOff = output being driven low; On = output being driven high. Does not appear forType = Contact I/P4.12.2 Relay outputsThis may apply to terminal pairs 1A1B, 2A2B, 3A3B, 4AC, 5AC (figure 2.2). Highlight the relevant terminalpair, then operate the scroll key to reveal the configuration menu.Module Ident RelayType (2A2B, 4AC) On Off O/P (default), Time Prop O/P, Valve Raise (not if DC output I/O fitted).Type (3A3B, 5AC) ‘On Off O/P’ (default), ‘Time Prop O/P’. The 3A3B relay is not fitted if ‘DC Output’ I/O isfitted.PVFor On Off O/P, a value ≥ 0.5 closes the relay contacts, otherwise, the contacts areopen. For Time Prop O/P, the value is the demanded output %.Min On Time For Type = Time Prop O/P only, this allows a minimum on time to be specified to reducerelay wear. Configurable range = 0.1 to 150 secondsInvertInverts the output sense for the relays (not applicable if Type = Valve Raise).(Continued)Page 146HA030554Issue 7 Nov 12