User Guide - Eurotherm Ltda

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nanodac RECORDER/CONTROLLER: USER GUIDE4.7.8 Advanced Loop Output Menu (Cont.)Manual ModeManual OutputSelects the type of transition to occur when changing to manual cascade mode (Section4.7.1):Track: Whilst in Auto mode, the manual output tracks the control output so that thereis no change of output when manual mode is switched to.Step: On transition to manual mode, the output is set to the value entered for ‘Forced-OP’ (below).Last Man. Out: On transition to manual mode, the output adopts the manual output valueas last set by the operator.The output when the loop is in manual mode. In manual mode the controller limits themaximum power, but it is not recommended that it be left unattended at high powersettings. It is important that over range alarms are fitted to protect the process.Note: It is recommended that all processes are fitted with an independent over range detection system.Forced Output Forced Manual output value. When ‘Manual Mode’ = ‘Step’, this is the output valueadopted when changing from Auto to Manual mode.Manual Startup When set to off (cross symbol), the controller powers up in the same (auto or manual)mode that obtained when it was switched off. When set to on (tick symbol) the controlleralways powers up in manual mode.Pff EnPower feed forward enable. ‘Yes’ enables power feed forward (adjusts the output signalto compensate for variations is supply voltage. ‘No’ disables Pff. See section B2.6.6for further details.Line Voltage Read only display of the current supply voltage.Cool Type Appears only if ‘Ch2 Control’ = ‘PID’ in the setup menu (Section 4.7.2 and allows theuser to enter the appropriate type of cooling (section B2.6.7):Linear: For use when controller output changes linearly with PID demand.Oil: For oil cooled applicationsWater: For water cooled applicationsFan: For forced air cooling.FF TypeFeed forward type (section B2.6.8):None: No signal fed forward.Remote: A remote signal is fed forward.SP: Setpoint is fed forward.PV: PV is fed forward.FF GainFor FF types ‘PV’ and ‘SP’, this scales the feed forward signal.FF OffsetFor FF types ‘PV’ and ‘SP’, this defines the offset of the scaled feed forward signal.FF Trim Limit For FF types ‘PV’ and ‘SP’, defines symmetrical limits about the PID output which are appliedto the scaled feed forward signal.FF Remote Allows another value from the strategy to be used as the primary control variable in thefeed forward strategy. The gain and offset are not applied to the remote value.FF Output For FF types ‘PV’ and ‘SP’, this is the calculated (scaled, offset and trimmed) feed forwardsignal. FF OP = FF gain (input + FF Offset)Track Output If ‘Track Enable’ (below) is set to ‘Yes’, this is the value for the loop output to track whenoutput track is enabled.Track Enable When set to ‘Yes’, the output follows the Track OP value (above). When subsequentlyset to ‘Off’ the loop makes a bumpless return to control.Rem. Output Low/High Used to limit the output when using a remote source. These limits cannot exceed the‘Output Low’ and ‘Output High’ values described earlier in this section.Page 122HA030554Issue 7 Nov 12
nanodac RECORDER/CONTROLLER: USER GUIDE4.7.9 Advanced Loop Diagnostics menuMaster ErrorSlave Error(M)Prop. Output(M)Integral Out(M)Deriv. Output(S)Prop. Output(S)Integral Out(S)Deriv. OutputTarget OutputLoop Break (S)Loop Break (M)Sensor Break (S)Sensor Break (M)Sched PBSched TiSched TdSched CBHSched CBLSched MRSched Loop BreakSched R2GSched Out HighSched Out LowWorking Out LowWorking Out HighMaster FBCalc OPHiSatLimLoSatLimOPPIDThe difference in value between the setpoint and the PV for the Master (Read only).The difference in value between the setpoint and the PV for the Slave (Read only).Shows the proportional term contribution to the control output of the Master (Read only).Shows the integral term contribution to the control output of the Master (Read only).Shows the derivative term contribution to the control output of the Master (Read only).Shows the proportional term contribution to the control output of the Slave (Read only).Shows the integral term contribution to the control output of the Slave (Read only).Shows the derivative term contribution to the control output of the Slave (Read only).The requested control output. The target of the active output if rate limiting is active.(Read only.)Loop Break Alarm (Read only). Becomes active ‘Yes’ if the relevant loop break time(LBT1/2/3), set in the Slave PID menu (Section 4.7.5) is exceeded, otherwise ‘No’ is displayed.Loop Break Alarm (Read only). Becomes active ‘Yes’ if the Master loop break time (LBT),set in the Master PID menu (Section 4.7.4) is exceeded, otherwise ‘No’ is displayed.Indicates Slave sensor break status (Read only). On (tick symbol) indicates a sensorbreak has occurred; Off (cross symbol) shows that no sensor breaks have been detected.Indicates Master sensor break status (Read only). On (tick symbol) indicates a sensorbreak has occurred; Off (cross symbol) shows that no sensor breaks have been detected.The scheduled proportional band for the current PID set.The scheduled integral time for the current PID set.The scheduled derivative time for the current PID set.The scheduled cutback high value for the current PID set.The scheduled cutback low value for the current PID set.The scheduled manual reset value for the current PID set.The scheduled loop break time for the current PID set.The scheduled relative cool gain value for the current PID set.The scheduled output high limit for the current PID set.The scheduled output low limit for the current PID set.The low limit for the working output (Read only). This is the value used to limit the outputpower of the loop and is derived from the gain scheduled limit, the remote limit andthe safety limit.The high limit for the working output (Read only). This is the value used to limit the outputpower of the loop and is derived from the gain scheduled limit, the remote limit andthe safety limit.Master FB is the value of the master control output after limiting and is used for Integraldesaturation.Master P+I+DHiSatLim is an internally generated limitLoSatLim is an internally generated limitMaster control output It will be the same as Calc OP if the master is not in CutbackHA030554Issue 7 Nov 12Page 123
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User Guide - Eurotherm Ltda

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