Siemens 505-2557 installation and operation guide Troubleshooting

Page 55

3.6Troubleshooting

Troubleshooting the Use the following procedures and Table 3-10 to troubleshoot your system. System

•First examine your V- or K-memory tables to ensure that the data to be loaded into the module makes sense.

•Utilize the worksheets located at the end of this chapter to calculate key address locations.

•Examine the relay ladder program to verify that the V-memory tables are being loaded into the correct WY65 ± WY96 output registers.

•Examine the starting address of the module and ensure that the offsets for the X16 input Module_Ready = (starting address + 15) and that the Y outputs = (starting address + 16), that the WX registers = (starting address + 32) and the WY registers = (starting address + 64).

•Examine the relay ladder program to verify that the addresses used match the offsets as described above and those from the worksheets.

•Verify that the data identification outputs Y19 ± Y17 properly reference the data that is being loaded.

•Use the TISOFT status and chart functions to debug the program and to verify that the X16 Module_Ready input does indeed turn on. If this input does not turn on, there is a problem with the module. Contact the Siemens Energy & Automation, Inc., Technical Services Group.

•Verify that the Y32 Data_Ready output does indeed turn on to load the data into the SIMATIC 505±2557 module.

•Place a known input value on the module channel and verify that the channel is producing the correct results.

SIMATIC 505±2557 Installation and Operation Guide

Advanced Function Programming 3-25

Image 55

Contents Simatic Copyright 1998 by Siemens Energy & Automation, Inc Manual Publication History List of Effective Pages Contents Iv Contents List of Figures List of Tables Preface Approval Agency ApprovalsEuropean Community CE100 Ohm, 10 Ohm, 120 Ohm RTDs, or Millivolt Inputs DescriptionOperating Modes Word Input to the PLC from the Module Scale Units RTD Input to Digital ConversionEffect SignalsOut-of-Range Input Effect of Voltage Input 10 Ohm Copper Input Resolution ResolutionCalculating the I/O Base Power Budget Installing and Configuring the ModuleSelecting 2 and 3 Wire or 4 Wire Operation Installing and Configuring the Module Configuring Selecting Temperature orMillivolt Input Selecting Data Selecting DegreesCelsius or FahrenheitConfiguration Jumper Locations Module Into InsertingBase Copper Wire Table at 25 Degrees Celsius Wiring the Input ConnectorsPress In Wiring Connector Wiring Diagram for 2, 3, or 4 Wire RTD Wiring Diagram for Millivolt Measurements Cable Grounding Example I/O Configuration Chart Advanced Function Programming Advanced Advanced Software FunctionsIntroduction OverviewConfiguration Setting the ModuleJumper Controller I/O LoggingMemory Input Channel Data Internal Register StructuresInput and Output Register Offsets Input RegistersPeak/Valley Hold Input Words Input Flag BitsAveraging Output Data RegistersControl Registers Function Enable BitsInputs Discrete Handshake Inputs Data Identification Bits OutputsData Loading Process Loading Data into the Simatic 505±2557 ModuleSample Low and High Alarm Setpoints Identifying the Data Being Transferred 11 Enabling the Functions Loaded Loading Programs into the I/O Module 13 Startup Relay Ladder Logic Page Timing Constraints When UsingTiming Overhead for Functions Enabled Timing ConsiderationsAdditional Information about Each Function Default ValuesDefault Function Values Default Function Values for Simatic 505±2557Degrees Fahrenheit Alarm SetpointsDegrees Centigrade orDigital Filtering Peak and Valley AveragingHold Flag Bits Hold ResetPrecedence FunctionTroubleshooting Symptom Probable Cause Corrective Action 10 Troubleshooting Flow Diagram17 I/O Register Quick Reference I/O Register Quick ReferenceOr K Memory Configuration Tables Page Addressing Worksheet 18 Open RTD Status Bits Items Unique to the Simatic 505±2557 ModuleTroubleshooting Table B-1 Specifications SpecificationsSpecifications subject to change without notice Jumper Settings Log Sheet Customer Response Business Reply Mail