User Guide - Eurotherm Ltda

nanodac RECORDER/CONTROLLER: USER GUIDE4.6.5 Setpoint menu parametersRange High/LowSP selectSP1, SP2SP Low LimitSP High LimitAlt SP EnableAlt SPRateRate DoneSP Rate DisableServo To PVSP TrimSP Trim High/LowManual TrackSetpoint TrackTrack PVTrack ValueSP Int BalanceRange limits. Valid entries from 99999 to -99999. Range limits set absolute maxima andminima for control loop setpoints. If the proportional band is configured as a % span,the span is derived from the range limits.Select SP1 or SP2. SP1 is considered to be the primary setpoint for the controller, andSP2 a secondary (standby) setpoint.Allows values for Setpoints 1 and 2 to be entered. Valid entries are any within the range‘SPHigh Limit’ to ‘SPLowLim’.Minimum setpoint limit for SP1 and SP2. Valid entries are in the range ‘Range Lo’ and‘SP High Limit’Maximum setpoint limit for SP1 and SP2. Valid entries are in the range ‘Range Hi’ and‘SP Low Limit’‘Yes’ enables the alternative setpoint; ‘No’ disables it. May be wired to an external orinternal source.When wired this is a read only display of the alternative setpoint value. Otherwise, theuser may insert a value. Valid values are limited by ‘Range Hi’ and ‘Range Lo’.Sets the maximum rate at which the working setpoint may change in Engineering unitsper minute. Often used to protect the load from thermal shock cause by large stepchanges in setpoint. ‘Off’ disables rate limiting.Read only display. ‘Yes’ indicates that the working setpoint has completed its change.‘No’ indicates that the setpoint is still ramping.Appears only if Rate is not ‘Off’. ‘Yes’ disables rate limiting; ‘No’ enables rate limiting.If ‘Rate’ is set to any value other than ‘Off’, and if ‘Servo to PV’ is set to ‘Yes’ then anychange in the current setpoint value causes the working setpoint to servo to the currentPV before ramping to the new setpoint value.A positive or negative value added to the setpoint, for local fine tuning. Valid entriesare any value between ‘SP Trim High’ and ‘SP Trim Low’.Setpoint trim high and low limits‘On’ enables manual tracking to allow the local SP to follow the value of the current PV.See section B2.5.5 for more details. ‘Off’ disables manual tracking.‘On’ enables setpoint tracking to allow the local SP to follow the value of the alternativeSP. See section B2.5.4 for more details. ‘Off’ disables setpoint tracking.The unit tracks the PV when it is servoing or tracking.The SP to track in manual trackingAllows the user to enable (tick) or disable (cross) debump on PV change.Page 102HA030554Issue 7 Nov 12