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E96-314 ® ® Frequency Counter Slave (IMFCS01) Process Control and Automation Solutions from Elsag Bailey Group...
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The information contained in this document is subject to change without notice. Elsag Bailey, its affiliates, employees, and agents, and the authors and contributors to this publication specif- ically disclaim all liabilities and warranties, express and implied (including warranties of merchantability and...
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Preface The Frequency Counter Slave Module (IMFCS01) is a single channel frequency input for the Multi-Function Processor (MFP), Multi-Function Controller (MFC) and Hydraulic Servo Slave Module (HSS). It interfaces a steam or gas turbine to the MFP or MFC, providing them with accurate frequency count and time period data.
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® List of Effective Pages Total number of pages in this instruction is 36, consisting of the following: Page No. Change Date Preface Original List of Effective Pages Original iii through vi Original 1-1 through 1-6 Original 2-1 through 2-7 Original 3-1 through 3-5 Original...
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® Safety Summary GENERAL Equipment Environment WARNINGS All components, whether in transportation, operation or storage, must be in a noncorrosive environment. Electrical Shock Hazard During Maintenance Disconnect power or take precautions to insure that contact with energized parts is avoided when servicing. Special Handling This module uses Electrostatic Sensitive Devices (ESD).
SECTION 1 - INTRODUCTION OVERVIEW The Frequency Counter Slave Module (IMFCS01) is a single channel frequency input for the Multi-Function Processor (MFP) or Multi-Function Controller (MFC) modules. The FCS conditions, converts and processes pulse inputs from a mag- netic pickup attached to the front standard of a steam or gas turbine.
Maintenance The maintenance section contains a list of maintenance procedures. This section explains the services and training that Bailey Con- Support Services trol Co. makes available to their customers. HOW TO USE THIS MANUAL Read this manual before handling the FCS. Refer to a specific section for information as needed.
Slave Expander Parallel communication bus between the master module and the slave located on the backplane of the MMU. Frequency Counter Slave Module (IMFCS01). Function Code An algorithm that defines specific functions. These functions link together to form the control strategy.
INTRODUCTION ® SPECIFICATIONS General Microprocessor MC68701 with 2k EPROM, 128 bytes RAM, 16 bit internal timer Process I/O 1 frequency input (from termination unit) System Communications 8 bit parallel Operating 300 mVp-p to 120 Vrms (150 mVp to 170 Vp) Input Voltage Range Input Frequency Response 1 Hz to 12.5 kHz...
SECTION 2 - THEORY OF OPERATION INTRODUCTION This section explains the operation of the frequency counter slave. It gives an overview of the frequency counter slave mod- ule and related modules within a process control system and explains the operation of the module circuitry. CONTROL LOOP OPERATION The Frequency Counter Slave (FCS), Hydraulic Servo Slave (HSS) and Multi-Function Processor (MFP) form the controlling...
THEORY OF OPERATION ® Frequency Counter Slave The FCS detects turbine rotation by counting pulses it receives from a magnetic pickup on the turbine shaft. Additionally, it keeps a 24 bit timer value corresponding to the period of the pulse count. It stores these values in a buffer and sets a data available status bit to notify the MFP that it has current data.
THEORY OF OPERATION external inputs (pushbuttons, contacts, etc.). Also, a trip bias circuit on the HSS allows the operator to manually drive the fuel throttle valve to the closed position in an emergency. Multi-Function Processor The MFP is the master module of the control loop and controls turbine speed automatically.
THEORY OF OPERATION ® DOUBLE BUFFERED AND LATCHED DATA INPUT SIGNAL CONDITIONING WATCHDOG MOD STAT SEQUENCING LOGIC XBUS ADD XBUS I/O TP50148A Figure 2-2. Block Diagram - FCS Module The input enters the board via the P3 connector. The input sig- nal conditioning circuit chops and squares the AC input into TTL digital levels, making it electrically compatible with the MCU.
THEORY OF OPERATION Figure is a typical example of a sinusoidal input signal (E1). Diodes CR4-CR7 clip the input signal at +10 V limiting the input amplitude to 20 Vp-p (E2). R4 through R7 limit the inrush current. This circuit can process input signals that range from 300 mVp-p to 120 Vrms at frequencies in the range of 1 Hz to 12.5 KHz.
THEORY OF OPERATION ® Status bits set by the MCU control the transfer of information and inform the MFP of module status. If the input signal is lost, the MCU tells the processor module by generating a status bit. The MCU sends the bit to the Module Status Block (MOD STAT).
The slave expander bus interface block provides the circuitry that enables communication between the processor module and the FCS. A Bailey designed integrated circuit provides a data bus for interfacing the storage area and the module status buffer to the processor module. This block follows the Bailey designed protocol for master/slave communications.
Documents) for a list of documents needed to configure the MFP to function with the FCS. HANDLING Always use Bailey's Field Static Kit (Kit P/N 1948385A2 - con- sisting of wrist strap, ground cord assembly and alligator clip) when working with modules. The kit is designed to connect a...
INSTALLATION ® 4. Use the original packing material and container to store the module. 5. Store the module in an environment of good air quality, and free from temperature and moisture extremes. INSTALLING THE TERMINATION UNIT/MODULE AND FIELD WIRING For information about installing process wiring and the digital input termination unit (TDI) or the digital input termination module (IDI), refer to the TDI or IDI termination instruction.
INSTALLATION SETTING THE SLAVE EXPANDER BUS ADDRESS The FCS must have its slave expander bus address set to be able to communicate with the processor module. The user can select an address for the FCS from 0 to 63. The address is set with switch SW1, an 8-pole dipswitch.
INSTALLATION ® INSERTING THE FCS IN THE MODULE MOUNTING UNIT To install the module in the module mounting unit: 1. Verify the module mounting unit slot assignment for the module. 2. Check the slave expander bus dipshunt socket on the backplane of the MMU.
INSTALLATION EDGE CONNECTOR PIN ASSIGNMENTS Tables through show the pin assignments for the mod- ule connectors. Table 3-2. Edge Connector P1 (Module Power) Pin Assignments Signal Signal + 5 V dc + 5 V dc Unused Unused Common Common + 15 V dc - 15 V dc Unused Unused...
SECTION 4 - OPERATION INTRODUCTION This section contains information about Frequency Counter Slave (FCS) operation. The FCS requires no operator action. Completing the instructions in Section 3 assures successful start-up and operation. START-UP PROCEDURES FCS module start-up is fully automatic. When the FCS comes on line, the MFP establishes communication with it.
Troubleshooting involves physical contact with the system, including the handling of boards with electrostatic sensitive devices. To avoid creating additional problems while trouble- shooting, always use Bailey's Field Static Kit (P/N 1948385A2) NOTICE when working with the modules. The kit is designed to connect...
TROUBLESHOOTING ® 2. Refer to the instruction manual for the processor module for a list of error codes and corrective action. 3. If the FCS continues to fail to start and there are no config- uration errors, go to the hardware failure troubleshooting procedure.
3. If there are no configuration errors or hard failures and the FCS continues to fail to start, replace the FCS module. 4. If replacing the module does not correct the problem, call Bailey Controls Company for assistance. Table 5-1. Troubleshooting FCS Start-Up Failures Problem...
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Replace the Frequency Counter Slave Module. the related hardware installation is correct with no configuration errors. The replacement FCS Call Bailey Controls Company for assistance. fails to start and all other areas check good. START-UP FAILURES 5 - 4 I-E96-314A...
TROUBLESHOOTING START ENTER MODULE IN EXECUTE EXECUTE MODE? MODE MFC LEDS 7 SYSTEM DONE AND 8 ON? OPERATING? RETURN TO THE REMOVE FCS CONFIGURATION MODULE FROM TROUBLESHOOTING SECTION EXPANDER SET THE BUS DIPSHUNT EXPANDER BUS CORRECT? DIPSHUNT XBUS SET THE XBUS INSERT FCS ADDRESS ADDRESS...
TROUBLESHOOTING ON-LINE FAILURE This part of the troubleshooting section covers failures that occur while the FCS is on-line and how to troubleshoot those failures. On-line failures are a result of hardware failure, loss of input signal, bad quality or the input signal is outside of the operating specifications.
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TROUBLESHOOTING ® Table 5-2. Troubleshooting FCS On-Line Failures Error Message Cause Corrective Action Not Responding Reseat the FCS module. 1. Turn the two thumbscrews on the module faceplate counterclockwise to release the module. 2. Grasp the module at the bottom of the faceplate and pull the module away from the backplane until it releases from the backplane connector.
SECTION 6 - MAINTENANCE INTRODUCTION The frequency control slave requires minimal maintenance. The following maintenance schedule will ensure troublefree service. NOTE: Only qualified personnel should perform maintenance. MAINTENANCE The FCS maintenance schedule is shown in Table 6-1. Perform these tasks at the specified intervals. Table 6-1.
SECTION 7 - SUPPORT SERVICES INTRODUCTION Bailey Controls is ready to assist in the use and repairs of its products. Requests for sales and/or applications services along with installation, repair, overhaul and maintenance con- tract services should be made to the nearest sales office.
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