Eaton CMA User Manual
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Eaton CMA User Manual

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CMA User Manual
Eaton Proprietary

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Summary of Contents for Eaton CMA

  • Page 1 CMA User Manual Eaton Proprietary...

  • Page 2: Table Of Contents

    6.3.2 Single spool parameters ............. . .25 CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...
  • Page 3 9.1 CMA service and installation manual ........

  • Page 4: Revision History

    The purpose of this document is to give the reader is 200 milliseconds and can be set by writing to the object guidance on how to setup and apply the CMA control valve. dictionary entry listed below. It is recommended that the reader use Pro-FX Configure when setting up CMA.

  • Page 5: J1939 Networks

    ECU, it will wait for a defined period and CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...

  • Page 6: J1939 Object Dictionary Parameters

    V2SI Publish Rate 6 105 (0x69) milliseconds V2SI Publish Rate 7 106 (0x6A) milliseconds otee: The publish rates have to be set as a multiple of 3 milliseconds (6, 9, 12, 15, etc). CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...

  • Page 7: Canopen Networks

    (further discussion is given below). A Available flow = available flow message * gain – offset value of 0 for the priority setting means that service is not CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...
  • Page 8 The reason that the total for the flow share demands otee: only add up to 80 is because we set a flow share gain of 0.9 and an offset of 10 (100 * 0.9 -10 = 80). CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...

  • Page 9: Valve Replacement Configuration

    CMA User Manual 4.4 Valve replacement configuration and its pilot valve is replaced, then the copying of The CMA valve can be configured to handle field mechanical parameters needs to be prevented because replacement of components in a couple different ways.
  • Page 10 For Variable Displacement systems, the volume inside the following table lists the oil types can be selected in the block is accounted for in the valve firmware. LS_Volume valve and the object dictionary location. CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...
  • Page 11 Gain scale at minimum pressure 0x33C8 Gain scale at 50 bar 0x33C9 Gain scale at 100 bar 0x33CA Gain scale at 150 bar 0x33CB Gain scale at 200 bar 0x33CC Gain scale at 250 bar 0x33CD CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...

  • Page 12: Electronic Load Sensing

    Fc is the low pass filter cutoff frequency. otee: In order to get the full rated flow out of the valve, the total margin from supply to service needs to be at least 14 bar. CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...

  • Page 13: Actuator Areas

    32767 . However, we want to maintain the highest level of CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...

  • Page 14: Maximum Pressures

    If you have the CMA port reliefs fitted, then they should be about 10 bar above the pressure maximum setting. The reason for this margin is...

  • Page 15: Maximum Flows

    Table 14 . Object dictionary name J1939 section index CANOpen object Suggested default value Units Minimum Pressure Differential 0x4386 App Dependent cbar CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...

  • Page 16: Overrunning And Passive Margins (Load Differential)

    For services that transition through this condition, if you valve in a passive condition longer (i.e. a higher overrunning feel like there is a delay when you transition from passive to margin) will minimize this effect. CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...

  • Page 17: Digital Filter Coefficient

    32767 is never used as it completely blocks the signal mind, it is good idea to try to filter any load frequencies information to the valve’s controllers. above the desired response characteristics to mitigate any resonances in the system. CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...

  • Page 18: Oil Type Selection

    2852 (VG32 example) cSt*2 Custom Oil Viscosity -18C 0x43DB 3972 (VG32 example) cSt*2 Custom Oil Viscosity -20C 0x43DC 5000 (VG32 example) cSt*2 otee: For optimal performance, VG32 is preferred and is the suggested default. CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...

  • Page 19: Flow Demand Shaping

    As with most OD entries, in order for a change changes. For more information on this subject, refer to the Application Developers Guide. to take effect a write finalize has to be issued to the CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...

  • Page 20: Twin Spool Control Modes

    UFC gains will be slightly greater than unity. For scaling purposes, unity is represented as 100. For most applications, a good starting point for the UFC gain is 110 which equates to 10% (110/100) more flow out than in. CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...
  • Page 21 Offset Percent, the valve shall enter flow control. This allows application flow demand, the valve will transition back to the downstream port to ‘unlock’ and enables the valve to flow control. CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...

  • Page 22: Ifc (Intelligent Flow Controller)

    Mode = P Ctrl Mode = P Ctrl Dem = Pres Maximum Dem = Pres Maximum Mode = OL Pres Ctrl Mode = OL Pres Ctrl Dem = IFC Pres Dem Dem = IFC Pres Dem CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...

  • Page 23: Twin Spool Pressure Control (Deltap Control)

    IFC Press Shaper Negative Rate Limit 0x426D -1473823 cbar/1.5ms * 2^16 Load Damp Filter Passive 0x426E 27139 Load Damp Filter Overrunning 0x426F 27139 Load Damp Gain Passive 0x43A0 Load Damp Gain Overrunning 0x43A1 CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...

  • Page 24: Single Spool Control Modes

    Rate Control Ki 0x42A6 6.3 Single spool control modes Within the CMA valve, there are several single spool control When using single spool controller on a bi directional modes that can be leveraged. For most applications that actuator, there needs to be two messages sent to the require single spool control, the modes will be limited valve –...

  • Page 25: Single Spool Flow - Detailed Function

    Pressure Damped Flow Controller described in In addition to the hydraulic limit parameters, the single the Twin Spool Flow section. spool controller uses many of the other ‘application’ level CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...

  • Page 26: Additional Control Features

    ‘Float Pressure Limit’ and then The valve has a built in float feature that is more the spool will be moved to the tank end stop. The CMA sophisticated than its mechanical competitors. The float...

  • Page 27: Hose Burst Detection

    As described in the Application Setting section above, flow limits that will not reset the valve. This can give real the CMA valve provides pressure limits for each workport time control over both the pressure and the flow out of that will limit the pressure when the valve is in flow each workport.

  • Page 28: Anti-Stall Detection

    6.5.1 Air bleed There are some configurable parameters that are associated Another built in feature to the CMA control valve is the air with the air bleed process (refer to the table shown below). bleed mode. Air bleed is a very straight forward tool. Its The Air Bleed Time is the desired length of the air bleed.

  • Page 29: Line Loss Pressure Compensation

    0x43B4 boolean 6.6 Limp modes The CMA valve is designed to maintain partial functionality Flow are only allowed on the side that does not have a in the event of a sensor failure on a service. The valve can sensor fault). Different Limp Modes (Fail Operational Twin...
  • Page 30 Allow Airbleed Mode for any fault 0: No 1: Yes Unused Unused Unused Unused 28-29 Enter Options 0-3 see description 30-31 Exit Options 0-3 see description Unused This is the sign bit (MSB) CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...

  • Page 31: Enter Options

    Fault Handler Configuration (bit map) 0x425A Application Specific Bit mask Off-side Pressure Demand 0x4288 1500 cbar Max Load Estimate WP1 0x4289 30000 cbar Max Load Estimate WP2 0x428A 30000 cbar Logged Fault 0x43DD enum CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...

  • Page 32: Trouble Shooting Guide

    3. There are critical errors 3. If there are critical errors, attempt a valve reset (soft or hard). If the errors persist, contact your local Eaton representative. 4. A valve has been replaced and the air bleed and 4. Request air bleed through Pro-FX Configure or implement in training routine have not been completed the user application.
  • Page 33 3. Reduce the responsiveness of the pump to rising or falling (or both) pressure demands using the Rate of Change Limits 4. Make sure the Line Loss Pressure Compensation gains are not too high. CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...

  • Page 34: Error Codes

    Information during start-up a new VSC was detected Information during start-up a new CV was detected Information during start-up a new PV was detected Information during start-up a new block was detected Information CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...
  • Page 35 Error/Event VSC could not claim a valid addres for V2SI/J1939 Error/Event A write request was attempted to a read-only value Information A write request was attempted to a (still) protected value Information CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...
  • Page 36 WP1 Error/Event pressure control fault WP2 Error/Event Spool stroke out of range WP1 Error/Event Spool stroke out of range WP2 Error/Event Inlet pressure too low to safely control the valve Warning CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...

  • Page 37: Debug Switches

    The following is a table that describes the outputs debug outputs in the OD. The debug switches are organized for each switch setting. into two levels. The Main Debug Switches connect the CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...

  • Page 38: Main Debug Switches

    Supply pressure minus WP1 pressure Tank Delta Pressure WP1 [cbar] WP1 pressure minus Tank pressure Supply Delta Pressure WP2 [cbar] Supply pressure minus WP2 pressure Tank Delta Pressure WP2 [cbar] WP2 pressure minus Tank pressure CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...

  • Page 39: Low Level Debug Switch 1

    13: Positive Flow - Anti-fallback 20: Negative Flow - Passive 21: Negative Flow - Overrunning 22: Negative Flow - Pressure Limit 23: Negative Flow - Anti-fallback Flow Demand [lpm x 8] Shaped flow demand CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...
  • Page 40 Position Error [um] position error Position control debug 1 0: Tank Control Side 1: Pressure 2: Center Shaped Position Demand [um] Position demand after a shaper is applied Position Error [um] Position error CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...

  • Page 41: Low Level Debug Switch 2

    13: Positive Flow - Anti-fallback 20: Negative Flow - Passive 21: Negative Flow - Overrunning 22: Negative Flow - Pressure Limit 23: Negative Flow - Anti-fallback Flow Demand [lpm x 8] Shaped flow demand CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...
  • Page 42 Position Error [um] position error Position control debug 2 0: Tank Control Side 1: Pressure 2: Center Shaped Position Demand [um] Position demand after a shaper is applied Position Error [um] Position error CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...

  • Page 43: Algorithm Select Enumerations

    As described in the VSM Valve Replacement Configuration bleed procedure, the message protocol for training can be section, the CMA valve has built in capability to either found in the Application Developers Guide. During training, automatically replace work section pilots and inlet section the valve will cycle the main stage spool in a couple of pilots, or replace valves based on received user commands.

  • Page 44: Vsm Replacement

    As an example, if the user wants to see only position error faults and minimum temperature faults, they would set the fault mask to 513 (1000000001b). CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...

  • Page 45: Terminology

    The benefit to the CAND is an unloader valve. It will unload any used flow from the system for the CMA is that the valve has a lot of periodic pump. For a variable displacement system, the CV creates a data that needs to be exchanged between each node.

  • Page 46: Reference Documents

    Dem = Demand. The Service and Installation manual gives an overview Q Ctrl = Flow control. of the CMA as well as some general specifications. The manual also contains dimensional information along with P Ctrl = Pressure Control. weight estimates. There is also a chapter that goes through the wiring information for the valve.

  • Page 47: Device Numbering

    Time 10.2 Margin examples Load pressure Supply pressure The CMA valve has many tools to optimize the performance LS demand LS pressure of your application. One of those tools is the ability to adjust In the above figure you can see that the load sense the margin pressure at which each service will operate.

  • Page 48: Passive And Overrunning Margins

    Starting at time 0, the load is considered truly passive. As we move through time the P1 port pressure is In the CMA system, it is important to understand how reducing and the P2 port pressure is increasing. When the valve determines if the load is passive or overrunning.
  • Page 49 CMA User Manual CMA USER MANUAL E-VLMB-TT005-E April 2019 www.eaton.com...
  • Page 50 Eaton 1000 Eaton Boulevard Cleveland, OH 44122 United States Eaton.com © 2017 Eaton All Rights Reserved Eaton is a registered trademark. Printed in USA Document No. E-VLMB-TT005-E All trademarks are property April 2019 of their respective owners.

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