Siemens 505-2557 installation and operation guide Selecting, Temperature or, Millivolt Input

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Installing and Configuring the Module (continued)

Selecting	No hardware changes are required for millivolt inputs. To select millivolt
Temperature or	input mode for an input turn OFF the M and L switch for the input channel.
Millivolt Input	(See Figure 2-2.) To select a particular RTD probe for each channel
	configure the M and L switch.
	M	L
	0	0	Millivolt
	0	1	10 Cu
	1	0	100 Pt
	1	1	120 Ni

NOTE: Each channel contains a jumper to select between 2, 3 and 4 wire RTD elements. (See Figure 2-2, JP68). For 2 wire and 3 wire RTDs no change is required. For 4 wire RTDs the jumper should be removed and placed on a single pin for storage.

Selecting 2 and 3 As shipped the module is ready to accept 2 and 3 wire RTDs. To configure

Wire or 4 Wire an input channel for 4 wire operation requires the following steps: Operation

1.Remove the 3 wire select jumper JP68±JP83 for the appropriate input channel and store on a single pin.

2.Move 2 input jumpers/channel to the 4 wire position. For example: To configure Channel 1, move JP1 and JP2 to the 4 wire position.

Selecting 10 Ohm If a 10 Ohm RTD is selected the gain of the input amplifier must be

RTD Inputsincreased to process the smaller signal levels. (See Figure 2-2.) JP49±JP64 are the amplifier gain select jumpers for Channels 1±16. No jumper changes are required to select 100 or 120 RTD.

Selecting PLC Login Locate JP67 on the printed circuit board to select PLC Login Mode

Mode(See Figure 2-2 ). Standard login is 16 WX registers in the PLC. Advanced Operating Mode logs in as 16 X, 16 Y, 32 WX and 32 WY registers. Consult the Siemens 255x Sixteen Channel Advanced Function Programming Reference Manual part #62±177, if the advanced operating mode is to be selected.

Selecting Digital Locate the Digital Filtering Jumper JP65 (See Figure 2-2). To enable digital

Filteringfiltering, set the jumper in the ENABLED position. Since many analog input signals contain noise, Siemens recommends using digital filtering unless maximum response time is required.

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Installation

SIMATIC 505±2557 Installation and Operation Guide

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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 European Agency ApprovalsCommunity CE Approval100 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 ConversionSignals EffectOut-of-Range Input Effect of Voltage Input 10 Ohm Copper Input Resolution ResolutionInstalling and Configuring the Module Calculating the I/O Base Power BudgetSelecting 2 and 3 Wire or 4 Wire Operation Installing and Configuring the Module Configuring Temperature or SelectingMillivolt Input Celsius or Selecting DegreesFahrenheit Selecting DataConfiguration Jumper Locations Inserting Module IntoBase 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 Introduction Advanced Software FunctionsOverview AdvancedSetting the Module ConfigurationJumper Logging Controller I/OMemory Input and Output Register Offsets Internal Register StructuresInput Registers Input Channel DataPeak/Valley Hold Input Words Input Flag BitsAveraging Output Data RegistersFunction Enable Bits Control RegistersInputs 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 Overhead for Functions Enabled When UsingTiming Considerations Timing ConstraintsDefault Function Values Default ValuesDefault Function Values for Simatic 505±2557 Additional Information about Each FunctionDegrees Alarm SetpointsCentigrade or Degrees FahrenheitDigital Filtering Averaging Peak and ValleyHold 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