Sterling 882.00722.00 manual Max Allowed WTP/RPM, Mechanical Options Screen

Page 53

recommended) and it will not cause any error in the displayed measurement. Another more common procedure would be if an operator intermittently adds a processing agent to the extruder by dumping it directly into the weigh hopper. This will not cause any error due to the measurement algorithm that was previously mentioned.

Max Allowed WTP/RPM

If a lbs/hr per RPM value is every calculated above this setting then the GH will ignore the sample. This is to prevent an operator from draining a hopper while running and causing an erroneous, but consistent measurement. The flow through an open drain tube is very consistent and would cause the extruder to respond by speeding up unless this value is setup. By default this is disabled and must be configured by a knowledgeable service person. After running for some time you can go to the WTP/RPM Calibration page and observe the average WTP/RPM factor. You can then set this value above that by 200-300 % to eliminate the error caused by draining the hopper while running.

Figure 71: Typical Mechanical Options Screen

Max speed of

GH-F

Gravimetric

Feeder (GH-F

Only)

Used to change the pulses per revolution of the extruder

Should be factory set to “GH Hopper Mode” unless system is a GH-F

Go back to

Engineering Only

Directory

Mechanical Options Screen

For a GH-M and GH Full Control Systems the “GH Hopper Mode” should always be enabled. If the system is a GH-F gravimetric feeder then this should be set to “GH Feeder Mode”.

The mechanical options screen also allows the user to set the method of obtaining the extruder’s RPM. This setting should also be factory set.

If the optional Ethernet module is purchased, the unit should be set to “Write Ext RPM through COM (F13:1).

If the extruder’s RPM is being measured with the supplied proximity switch the unit should be set to “Measure Ext RPM with Prox”. If the mechanical device to measure the extruder’s speed presents more than one pulse per revolution, this value may be changed on the “Mechanical Options” page also. Simply input the number of pulses per revolution in the “Extruder PPR” field.

The hauloff encoder setting is only used on GH Full Control Systems.

The “GHF feeder max RPM” setting should only be set if the system is a GH-F gravimetric feeder. Set this value to the maximum RPM of the feeder itself. The AC drives double the maximum speed of the motor. Each motor can then run 3600 RPM. To calculate this setting divide by the gearbox setting (i.e. 10:1 would be 360).

Chapter 7: Appendix

53 of 60

Page 52 Page 54
Image 53
Page 52 Page 54
Contents GH-M Rate Monitor Allen-Bradley Controller Write Down Your Serial Numbers Here For Future Reference Unpacking and Inspection Shipping InfoEvent of Shipping Damage If the Shipment is Not CompleteCredit Returns Warranty ReturnsReturns Table of Contents Maintenance Safety Symbols Used in this Manual SafetyHow to Use This Manual Safety Tags and Warning Labels Description Wear Safety Glasses and Work Gloves Follow all Safety CodesOperator Responsibility ResponsibilityGeneral Responsibility Remember Reporting a Safety Defect Maintenance ResponsibilityFunctional Description AccessoriesModels Covered in This Manual General DescriptionCustomer Service Controller Features Typical Features and ComponentsMechanical Features Surge Hopper Extruder Inductive Proximity SwitchSystem Component Description Weigh Hopper OpenFunction Typical GH-M Operator Screen Operator Screens Common to all GH Systems Typical Setup Screens Ethernet Module Optional ComponentsLow Level Proximity Sensors Safety FeaturesPneumatic Slide Gate below surge hopper Mechanical Installation InstallationMounting Configurations Uncrating the EquipmentMachine Mount Electrical ConnectionsPneumatic Connections Initial Set-up Weigh Hopper InstallationMechanical Set-up Extruder RPM connectionDisplay Startup Screen Final ConnectionsController Set-up Recipe Page Start GH Controller Menu StructureWeigh Hopper Load Cell Calibration GH CalibrationDisplay Calibration Menu Screen WTP/RPM Calibration Hopper Size SetupHauloff Setup and Encoder Calibration Extruder SetupNetwork Setup Alarm SetupPanelView Configuration Screen Setting Date and TimeOperator Displays GH-M Operation ProceduresOperation Typical Operator Screen for GH Full Control system GH Full Control Operation ProceduresGH-F Gravimetric Feeder Operation Procedures Typical Manual Control Operator Screen Common ScreensPrint Inventory Alarm FlagsAlarms with Descriptions Preventative Maintenance Schedule MaintenanceCorrective Maintenance Preventative MaintenanceElectrical Internal Components of the Control PanelOutput Signals from Programmable Controller Input Signals to Programmable ControllerIntroduction TroubleshootingProblem Problem Corrective actionWarranty Specifications Warranty and Spare PartsWarranty Restrictions Warranty LiabilitiesAnnex B Information Customer ResponsibilitiesTypical Surge Hopper Assembly Parts List Programmable Settings Addendum Service Supervisor Information Passwords Typical Engineering Only Setup Screen Extruder Pulse Count Method Percent of hopper Method DefaultFull Hopper Method WTP/RPM FilterMechanical Options Screen Max Allowed WTP/RPMTypical Analog Options Analog options screen Diagnostics ScreenPassword Protection Customer Setup MenuAlarm Log UnitsAllen-Bradley Communications Manual Below are the items that can be accessed for the GH HopperAppendix Reload TOO Long Fixed Decimal Explanation Contract Department Service Department Sales DepartmentParts Department
Top Page Image Contents