Temperature Controller - Staveb AG

Parameter Adjustments and Application Considerations 4-21The direction the SP ramp changes is according to the relationship betweenthe process value and the set point (see Figure 4.52).Figure 4.52PV < SPPV > SPSet pointSPSP rampPVSPSP rampSamechange rateSet pointPVTimeTimePower ONPower ONRestrictions During SP Ramp Operation• Execution of auto-tuning starts after the end of SP ramp.• When control is stopped or an error occurs, the SP ramp function isdisabled.Table 4.G ParametersSymbol Parameters: Function Group Descriptionsl-hsl-lsprtSet Point Upper Limit:Initial Setting function groupSet Point Lower Limit:Initial Setting function groupSP Ramp Set Value:Advanced Setting function groupFor limiting SP settingFor limiting SP settingFor limiting SP change rateTo Move to the AdvancedSetting Function GroupBy default, the Advanced Setting function group is protected and you cannotdirectly move to this function group. To move to this function group, youmust first cancel the protection applied by the Protect function group. Seep. 4-23, Using the Key Protect Function Group.1. Press the and M keys simultaneously for at least 3 seconds in theOperation function group. (The key pressing time can be changed inProtect Function Group Move Time [Advanced function group].)Publication 900-UM003C-EN-E - January 2004