Siemens SAMMS-MV Ladder Diagrams Library of Standard Ladder Diagrams, Custom Ladder Diagrams

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3 Operating the SAMMS-MV Device

The communications inputs must be included in the ladder logic (control circuit).

3.6 Ladder Diagrams

3.6.1 Library of Standard Ladder Diagrams

The SAMMS-MV library of more than 40 ladder diagrams covers most standard motor control applications. Table 3.3 lists the standard control circuits and the input and output assign- ments for the library. You can use the library with the following starter types:

∙across-the-line, non-reversing

∙across-the-line, reversing

∙two-speed, two winding

∙two-speed, one-winding, constant or variable torque

∙two-speed, one-winding, constant horsepower

∙reduced-voltage, autotransformer

∙reduced-voltage, reactor

For each starter type, the library includes seven control types:

∙local two-wire

∙local three-wire

∙local three-wire, remote two-wire

∙local two-wire, remote two-wire

∙local three-wire, remote three-wire

∙remote two-wire

∙remote three-wire

SAMMS-MVE has seven preloaded circuits (ladder diagrams) for use with across-the-line (FVNR) applications. SAMMS-MVX may be used with any of the circuits.

For details on the library of standard ladder diagrams, refer to the SAMMS Standard Circuit Manual.

3.6.2 Custom Ladder Diagrams

For special motor control applications not covered by the library of standard ladders, you can construct custom ladder dia- grams using the input and output devices and their associated symbols for the SAMMS-MV device. Siemens personnel can build these custom ladder diagrams or you can build your own. You can purchase an optional IBM PC-compatible software package to develop custom ladder diagrams for special control applications. The package also includes a library of standard symbols. The package enables you to reconfigure existing SAMMS-MV devices to meet changing plant needs. Refer to the Custom Software Manual for the SAMMS device, Bulletin CP 3291.

Figure 3.2 Ladder symbols used with the SAMMS-MV device (sheet 1)

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Contents SAMMS-MV Qualified Person Contents Signal Words Field Service OperationQualified Person About this Manual Advanced Protection for Medium-Voltage Motors SAMMS-MV Device ModelsUsing the Standardized Control Panel Overload ProtectionProgramming Control Circuits Light bars Change settings requires password Yes Remote inputs OneSAMMS-MV Model Outputs OneInstalling the SAMMS-MV Device Full voltage non-reversing connection diagram Grounding the Device SAMMS-MV device communications connections Performing an Overload Relay Test Password ProtectionUsing the Reset/Test Push Button Performing a Lamp TestInput Devices Output DevicesCustom Ladder Diagrams Ladder Diagrams Library of Standard Ladder DiagramsSAMMS-MVX Standard control circuits PB1 PB2 PB3 PB4 PB5 PB6 Intelligent Reduced-Voltage Starting SAMMS-MVX Only Ridethrough Upon Loss of Power SAMMS-MVX OnlyMotor Ambient Temperature Incomplete SequenceODP motor thermal signature Protection Curves and Overload Classes Seconds Operating the SAMMS-MV 11 Motor protection graph Jam Protection SAMMS-MVX Only Ultimate Trip Level and Service FactorPhase Unbalance Dual Overload Protection SAMMS-MVX OnlyCooling Time Constants Ground Fault DetectionRepetitive Starts Start Inhibit12 Multi-start scenario for an ODP motor Function Key Autoreset After a Trip SAMMS-MVX OnlyUsing the Hand Held Communicator HHC Emergency RestartingMotor type Overload trip class class 2 through 5A CT primary current low speed if used Service factorFunction Number 5A CT primary current if used Full load current for OLR NoUsing the Enter Key Using the SAMMS-MV Device Func- tionsUP and Down Keys ON/OFF Select jam pickup current 120-400% Iflc F24 Loss of Load Select ground fault pick-up currentDefault Value Means warning13 Entering and changing passwords F1 Control Circuit Number and Incomplete Se- quence Status Program Mode/PasswordsF0 Ambient Temperature SAMMS-MV Functions18 to 72A Overload Setting Step Default Relay Size RangeF3 Size for Overload Relay #2 SAMMS-MVX Only F4 Full-Load Current for Overload Relay #1F7A Cold Stall Time F6 Service FactorF6A Motor Type F7 Overload Trip ClassF11 Emergency Restarting F8 Autoreset SAMMS-MVX OnlyF9 Phase Unbalance Protection F10 Display Time to RestartF13 Set Programmable Timer #1 F12 Ground Fault Protection or WarningF12A Ground Fault Pickup Current Size Pickup Current Default H3A-H3C 7A-I FLC 10A 20AF18 Display Total Elapsed Run Time of the Motor F21 Reset Motor DataF16 Trip Current F17 Current UnbalanceF23A Jam Pickup Current SAMMS-MVX Only F25 Percentage of Motor Winding TemperatureF22 Process Current Warning Level SAMMS-MVX Only F23 Jam Protection SAMMS-MVX OnlyF27 Address F26 Baud RateTroubleshooting Error Condition Troubleshooting Guide Error Condition Appendix a Technical Specifications Over load Spec ificat ions Stat ist ica l Data Dimensions Catalog Number SAM6 Switch # Function Position 375 Siemens Energy Automation, Inc