Series 1995L Gemco ® Micro-Set Programmable Limit Switch Installation & Programming Manual
1080 North Crooks Road Clawson, MI 48017-1097 Phone: (248) 435-0700 FAX: (248) 435-8120 Internet: www.ametekapt.com www.ametek.com Preface This manual is for the Installation and Maintenance of the Gemco Series 1995L Micro-Set Programmable Limit Switch. Copyright 2000 by AMETEK All Rights Reserved - Made in the U.S.A. Version 0.1 AMETEK has checked the accuracy of this manual at the time it was printed. Any comments you may have for the improvement of this manual are welcomed.
Contents Chapter 1: Introduction/Description 1 Chapter 2: Installation 3 Chapter 3: Programming 5 1.1 Programmable Features ....................................................................................................... 1 1.2 General Information ............................................................................................................. 1 1.3 Controller Features and Functions ........................................................................................ 2 2.
Chapter 6: Security Inputs 17 Chapter 7: Troubleshooting 18 7.1 Preliminary Checks ............................................................................................................ 18 7.2 Electrical Noise and Power Quality Consideration .............................................................. 18 7.3 Grounding ......................................................................................................................... 18 7.4 Incoming Power ....................................
Chapter 1: Introduction/Description Chapter 1: Introduction/Description The 1995L Micro-Set is a fully self-contained, 0 - 10 Volt input programmable limit switch. It includes a three-digit LED display, six output relays, and one fault check relay, and it is fully programmable for the following features: 1.1: Programmable Features Scale Factor Valid Scale Factor are 2 to 1,000. Electronic Offset Fully programmable offset to any number with the scale factor.
Chapter 1: Introduction/Description As the LDT passes through the preprogrammed dwell settings, the programmer outputs can energize solenoids, relays, or solid-state circuitry to control external circuits. The 1995L PLS was designed for use in linear applications. It incorporates many features for safe, efficient operation. The completely self-contained unit can operate up to 30 independent outputs (six standard) based on the linear position of the LDT.
Chapter 2: Installation Chapter 2: Installation This section describes the installation and wiring of a standard 1995L Micro-Set PLS. Changes to these instructions should be made as necessary if special options and/or equipment are used. The 1995L Micro-Set should be installed in an area free of water spray, corrosive gases, flying chips or other foreign matter. The operating temperature should be between 32 and 125 degrees Fahrenheit, with less than 95% relative humidity. 2.
Chapter 2: Installation 2.2: Electrical Installation The Micro-Set is designed for use in an industrial environment and incorporates extensive transient suppression circuitry. However, the same general installation rules should be followed that are used on all microprocessor-based equipment.
Chapter 3: Programming Chapter 3: Programming 3.1: Security Input The security input is often referred to as the Run/Program input. This input is located on the 16-place terminal strip and is discussed in Chapter 6: Security Inputs. This input prevents unauthorized changes to the programmed functions. With the unit in the Program mode, all functions of the controller can be programmed.
Chapter 3: Programming 3.4: Number of Outputs The 1995L comes programmed for six outputs, but it is expandable to 30 outputs. 3.5: Selecting Number of Outputs Selection of the number of outputs should be done after the desired scale factor is entered, and before any other programming is done. See Chapter 4: Expansion Modules. A) To program the number of outputs desired, the unit must be in the Program mode, then depress CIR# - 1 - 7 - 7 - ENT .
Chapter 3: Programming 3.7: Setpoint Formula Setpoint/Programs = 1467 -2 Number of Programs x A Where: A = = = = = 5 for 6 outputs 6 for 12 outputs 7 for 18 outputs 8 for 24 outputs 9 for 30 outputs Setpoints are in whole numbers (drop decimal). Example: S.P. = 12 outputs relays with 10 programs: 1467 10 x 6 -2 = 24.45 - 2 = 22 Setpoints/Program The following table shows the relationship between the number of outputs, the number of programs, and the number of setpoints per program.
Chapter 3: Programming C) CIR# - 7 - 7 - 2 - ENT will display the total number of setpoints available for use in the currently selected active program. D) To display the active program, depress CIR# - 7 - 7 - 1 - ENT . To change programs, with the unit in the Program mode, depress (0 thru Highest Program Number) - ENT . NOTE: Program 0 is the first program. If 10 programs were previously selected using Code 770, there will be programs 0-9. 3.
Chapter 3: Programming 3.10: Clear an Existing Setpoint A) Unit must be in the Program mode. B) Depress CIR# - (Output to be Cleared) - ENT . C) Depress CIR ON D) Depress the CLR SET key. Upon depression of the CLR SET the display after Step C is deleted. E) This keypad sequence must be completed once to clear an ON setpoint and a second time to clear the OFF setpoint. See Section 3.9: Setpoints or CIR OFF key until setpoint to be cleared is on the display. key, the setpoint on 3.
Chapter 3: Programming On units without Multiprogram, setpoint availability is dependent on the number of outputs enabled. 6 Outputs = 253 Setpoints Available 12 Outputs = 242 Setpoints Available 18 Outputs = 207 Setpoints Available 24 Outputs = 181 Setpoints Available 30 Outputs = 161 Setpoints Available Refer to the Section 3.5: Selecting Number of Outputs. 3.13: Electronic Offset The offset key is used to synchronize the digital display with the actual machine position.
Chapter 3: Programming Programming Reset-to-Preset Value The Reset-to-Preset Value is programmed by entering the following: A) Unit must be in the Program mode. B) The Reset-to-Preset must first be enabled before you can store any values. To accomplish this, depress CIR# - 1 - 6 - 6 - ENT - (0 or 1) - ENT . A zero (0) disables a C) function and a one (1) enables it. Once the Reset-to-Preset has been enabled, you can store a value in memory.
Chapter 3: Programming 3.16: Power-Up in Position or RPM The 1995L can power up displaying either Position or Scale Factor increments/sec. data. The power-up mode is programmed by entering the following: A) Unit must be in the Program mode. B) Depress CIR# - 1 - 6 - 3 - ENT - (0 or 1) - ENT . If a zero (0) is entered, positional data will be displayed upon power-up; if a one (1) is entered, the unit will power up displaying Scale Factor increments/sec. 3.
Chapter 3: Programming 3.18: Enable/Disable Outputs During setup, the outputs may be enabled or disabled. When outputs are selected to be disabled, the status LEDs and the relays will be OFF. The unit must be in the Program mode to disable the outputs; as soon as the unit is switched to the Run mode, the outputs will be enabled. The enable/disable feature is programmed as follows: A) Unit must be in the Program mode. B) Depress CIR# - (380 or 381) - ENT . CIR# 380 Enables the Outputs.
Chapter 4: Expansion Modules Chapter 4: Expansion Modules The 1995L PLS provides six outputs. A 1995E Expansion Module is required for each additional six outputs desired, up to a total of 30 outputs, or four expansion modules. The circuit location of each expansion module is defined by the location of a two-pin jumper on an eight-pin block in the upper left corner of the module. This jumper must be installed for the expansion module to operate.
Chapter 5: Fault Check Chapter 5: Fault Check The Fault Check option provides an automatic in-process self-diagnostic mechanism to verify that all PLS functions are operating properly. The Fault Check option will detect and disable system operation in the event of any of the following problems: 1. Analog to digital converter or associated electronic failure. 2. Microprocessor or 5 volt power supply failure. Non-system-type faults, such as individual output failures, will not be sensed.
Chapter 5: Fault Check 5.
Chapter 6: Security Inputs Chapter 6: Security Inputs The Run/Program security inputs may be operated by an isolated contact, current sourcing, or a current sinking device, 5V DC @ 10mA. See Fig. 10-1, Fig. 10-2 OR Fig. 10-3 (Chapter 10: Wiring Diagrams) for wiring options. NOTE: The 1995 PLS cannot be programmed until the security input has been actuated - continuity - between +5V DC and Security + input and between Security - input and ground.
Chapter 7: Troubleshooting Chapter 7: Troubleshooting The following procedures are intended to aid in isolating system malfunctions to field replaceable modules. These modules include the 1995 programmer, output relays, LDT and all interconnecting cables. Once isolated, the defective module should be replaced and returned to the factory for repair. NOTE: Field repair beyond this level is not recommended. 7.1: Preliminary Checks Check all system wiring connections at the LDT and at the programmer.
Chapter 7: Troubleshooting 7.4: Incoming Power Solenoids, welders, large motors, and variable-speed drives are all devices that generate excessive electrical noise throughout the power grid in a typical industrial environment. Isolation transformers or constant voltage type power supplies should be used to isolate microprocessor-based circuitry. The power on the output side of these isolation devices should be fed to the programmable limit switch and other microprocessor-based devices only.
Chapter 8: Specifications Chapter 8: Specifications 8.1: 1995 Micro-Set PLS Programmer Resolution Scale Factor Temperature Range Operating Voltage -12 Bit (4096) -2 to 1,000 -32°F to 125°F (Operating) -0°F to 150°F (Storage) -110/120V AC 50/60 Hz 300 mA INPUTS Transducer -Analog LDT o to 10 Volt output ***4 -20mA available as special Logic -Fault check and security 5V DC at 10mA. May be operated by isolated contact, current sourcing or current sinking device. OUTPUTS -Plug-in relays listed below 8.
Chapter 8: Specifications 8.4: DC Solid-State (Single Pole, Normally Open) Maximum Load Load Voltage Range Leakage Current On State Voltage Drop Surge Current Min. Operational Current Operate Time Reset Time -2 Amp DC -5 to 60V DC -2 mA Maximum -1.5V Maximum -5A (1 Sec. Maximum) -50 mA -0.5ms Maximum -2 ms Maximum 8.
Chapter 9: Troubleshooting Guide Chapter 9: Troubleshooting Guide SYM PTOM POSSIBLE CAUSES Display Shows: EEE Incorrect programming sequence or unit is not in the program mode. Review Chapter 6: Security Inputs for Run/Program information. Display Shows: EE4 Unit has detected a fault. Review Chapters 5: Fault Check and 7: Troubleshooting. Display Shows: PPP Loss of initialization. Loss of initialization indicates a severe power fluctuation or electrical noise.
Chapter 9: Troubleshooting Guide SYM PTOM POSSIBLE CAUSES System operates properly but exhibits a random momentary loss of all outputs. Random momentary loss of all power to the system. A loss of power for as short a duration as 50 milliseconds will cause the system to shut down. When power is reapplied, the system can take several seconds to reinitialize itself. During this time period, all outputs are disabled.
Chapter 9: Troubleshooting Guide SYM PTOM POSSIBLE CAUSES Fault check relay not enabled. The fault check relay will only be enabled when the fault check input is wired per Fig. 10- 1, Fig. 10- 2 OR Fig. 10- 3 (Chapter 10: Wiring Diagrams). If a fault is detected without the input wired, the display will show the fault message and all outputs will be disabled until the fault is fixed. If the fault check input is wired per Fig. 10- 1, FIig. 10- 2 OR Fig.
Chapter 10: Wiring Diagrams Chapter 10: Wiring Diagrams Fig 10-1 Wiring Diagram Drawing E0221200 Installation and Maintenance Manual 25
Chapter 10: Wiring Diagrams Fig 10-2 Wiring Diagram Drawing E0198202 26 Installation and Maintenance Manual
Chapter 10: Wiring Diagrams Fig 10-3 Wiring Diagram Drawing E0234500 Installation and Maintenance Manual 27
Chapter 10: Wiring Diagrams Fig 10-4 Wiring Diagram Drawing E0204400 28 Installation and Maintenance Manual
1080 N. Crooks Road l Clawson, MI 48017 800-635-0289 l 248-435-0700 l Fax 248-435-8120 www.ametekapt.com l www.ametek.com 1284 01/03.
