NWS300 Field Type Smart Meter

Transcription

1 OM NWS300 Field Type Smart Meter User's Manual

2 Copyright, Notices and Trademarks Azbil Corporation All Rights Reserved. While this information is presented in good faith and believed to be accurate, Azbil Corporation disclaims the implied warranties of merchantability and fitness for a particular purpose and makes no express warranties except as may be stated in its written agreement with and for its customer. In no event is Azbil Corporation liable to anyone for any indirect, special or consequential damages. The information and specifications in this document are subject to change without notice.

3 Preface Introduction We thank you for purchasing Azbil Corporation's Model NWS 300 field type Smart Meter.The NWS300 is designed to be installed in the field to digitally display a transmitter's analog output (4 to 20 madc). The NWS can be operated simply by connecting it to the signal lines of a transmitter, without requiring an external power supply. When combined with Azbil Corporation's Smart transmitters, the NWS supports the digital mode (DE protocol) and can be used in various engineering units. i

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6 Contents Preface i Unpacking, Checking and Storing NWS ii Signal Words on Safety Instructions iii CHAPTER 1 - CONFIGURATION AND STRUCTURE OF NWS DIGITAL INDICATION SYSTEM... 1 Overview System Configuration Compatible Transmitters Notes on Explosion-Proof NWS Structure and Parts Identification Structure... 6 Main Indicator Unit Terminal Box CHAPTER 2 - INSTALLATION Overview Installation Location Selection guidelines Installation Installation method Cabling and Wiring Connecting to an Azbil Corporation's Smart transmitter Combination with ST 3000 Series Combination with ST 3000 Series Combination with sn 3000 temperature transmitter Combination with SMT wire electromagnetic flowmeter Wiring for Combination of Multiple NWSs Connection to an SFC Connecting to a transmitter not made by Azbil Corporation Wiring for Explosion-Proof Model CHAPTER 3 - OPERATION OF NWS SYSTEM Overview Preparation Engineering Unit Selection Operation Display Adjustment Adjustment Using a CCS Adjustment Using an SFC Self-Diagnostic Function Transceiver Noise CHAPTER 4 - DISASSEMBLING AND ASSEMBLING NWS Overview Disassembling Assembling Continued on next page iv

7 Contents (continued) APPENDIXES A NWS Standard Specifications and Model Number Structure B Exterior View of NWS v

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11 1.2 Compatible Transmitters Combination with Azbil Corporation's transmitters When connected to an Azbil Corporation s Smart transmitter, the NWS accepts both analog signals (4 to 20 madc) and digital signals (DE protocol). The NWS accepts analog signals (4 to 20 madc) only when connected to a transmitter not made by Azbil Corporation. The NWS can be used together with the following Azbil Corporation's Smart transmitters: Smart differential pressure/pressure transmitter: ST 3000 Series 200 ST 3000 Series 900 (except JTD520, TD720) Smart temperature transmitter: STT 3000 Smart electromagnetic flowmeter: MagneW 3000 Smart 2-wire electromagnetic flowmeter: SMT 3000 For detailed information, refer to page 19. Combination with transmitters not made by Azbil Corporation The NWS can be combined with other manufacturers' transmitters as well. Note: When the NWS is connected to a transmitter not made by Azbil Corporation, the functions of diagnostic message display and engineering unit display will be limited. For detailed information, refer to page 30. 3

12 1.3 Notes on Explosion-Proof NWS Overview The explosion-proof NWS has been certified by a Japanese safety organization according to Japan's Industrial Safety (JIS) and Health Law for use in hazardous locations. Pressure-resistant explosion-proof structure A pressure-resistant explosion-proof structure is a completely enclosed structure that has the following characteristics. Even if explosive gas explodes in the casing, the casing does not break under the pressure of the explosion and prevents ignition of the external explosive gas. Guidelines for installation location Install the explosion-proof NWS according to the following guidelines: The hazardous locations where the explosion-proof NWS can be installed, are defined as follows: Gas explosion proofing, grade II environment Environment with a gas ignition point of 85 or higher In other words, the NWS can be installed in type 1 or type 2 hazardous locations, but not in type 0 locations. Installation method Warning: Correct wiring is important regardless of whether you install an NWS in a hazardous or non-hazardous location. Refer to Appendix A, NWS Standard Specifications and Model Number Structure. Select and connect external cables in accordance with Explosion Proofing Guidelines for Electric Equipment at Plant (Gas Steam Explosion Proofing) published by the Research Institute of Industrial Safety, Japanese Ministry of Labor, or equivalent. Be sure to install Azbil Corporation's standard pressure-resistant packing cable adaptor to the cable port of the terminal box. Please note that do not use any adaptors other than Azbil Corporation's standard adaptor. Continued on next page 4

13 The explosion-proof performance of the pressure-resistant explosionproof structure is maintained by the clearance, clearance length, and the mechanical strength of the casing. Therefore, protect the case and the cover from corrosion, deformation, and damage and protect the screwed parts and joined parts from damage, since the mechanical strength of the casing can be reduced by such factors. Installation method (Continued) Nameplate If the casing is damaged, contact the address given at the end of this manual. If any of the above conditions fail to be satisfied, the NWS s explosionproof performance cannot be guaranteed. Make sure to install and use the NWS under specified conditions. The explosion-proof NWS has been tested and approved by Industrial Safety Engineering Society based on Japan's Industrial Safety and Health Law and can be used in hazardous locations. A certification mark is attached to the nameplate of all explosion-proof NWSs. Figure 1-2 Nameplate 5

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17 Main Indicator Unit Description Parts Identification The main indicator unit has the following functions and structure: It receives signals from the transmitter and displays the value digitally. It has a button for selecting the display's engineering units. It displays status messages. The following illustration shows the structure and parts of the main indicator unit. Figure 1-6 Main Indicator Unit Main unit hexagon locking screw Liquid crystal display Main unit hexagon locking screw Engineering unit and calibration code selection button 9

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25 2.3 Cabling and Wiring Overview When combined with Azbil Corporation s Smart transmitters, the NWS accepts both analog signals (4 to 20 madc) and digital signals (DE protocol). In this case, the engineering unit and diagnostic message display functions will be fully uti1ized. Also, the NWS can be combined with a transmitters not made by Azbil Corporation that operates in analog mode (4 to 20 madc). For units not made by Azbil Corporation, the engineering unit and diagnostic message display functions will be limited. In some cases, the wiring procedures for the NWS depend on the model of the transmitter it is combined with. The following items deal with electric wiring: Cable connection position Cable selection and installation Grounding Cabling and wiring procedure Important: Connection position Do not connect the NWS to a commercial power supply. Commercial power can cause irrecoverable damage to the internal measurement circuitry and the transmitter. The following illustration shows the terminal block. Figure 2-3 Terminal Block Jumper strip Input signal terminal Input signal terminal Internal ground terminal 17

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27 Connecting to an Azbil Corporation's Smart transmitter Overview The NWS can be combined with the following Azbil Corporation's Smart transmitters: Smart differential pressure/pressure transmitter: ST 3000 Series 200 ST 3000 Series 900 (except JTD520, JTD720) Smart temperature transmitter: STT 3000 Smart electromagnetic flowmeter: MagneW 3000 Smart 2-wire electromagnetic flowmeter: SMT 3000 Note Make sure that the transmitter is turned off before connecting it to the NWS. 19

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38 Connecting to a transmitter not made by Azbil Corporation Overview The NWS can be combined with a transmitter not made by Azbil Corporation if the transmitter can operates in analog mode (4 to 20 madc). In addition, if an Azbil Corporation's Smart transmitter is used as an analog output (4 to 20 madc), the wiring instructions provided here can be used. However, Azbil Corporation's DE protocol cannot be used. Notes If using a transmitter not made by Azbil Corporation with the NWS, take into account the following: It displays values in % only. No other engineering unit can be used. If you attempt to select an engineering unit other than %, Err will be displayed. ANALOG is always displayed. When the loop current drops below -2 % (3.68 ma) or rises above % (21.04 ma), BAD XMTR STATUS will be displayed. When the NWS has any other problem, FAULT-LAST KNOWN VALUE is displayed. No other messages are displayed. Wiring method (1) for connecting one NWS to a transmitter not made by Azbil Corporation If the transmitter has a terminal for an external meter, connect the terminals of the two as shown below. Note: Do not disconnect the jumper strip between the S+ terminals on the terminal board of the NWS terminal box. Continued on next page 30

39 Figure 2-14 Combination with a Transmitter not Made by Azbil Corporation (Wiring 1) Wiring method (2) for connecting one NWS to a transmitter not made by Azbil Corporation If the transmitter has no terminal for an external meter, connect the terminals of the two as shown below. Note: Do not disconnect the jumper strip between the S+ terminals on the terminal board of the NWS terminal box. Figure 2-15 Combination with a Transmitter not Made by Azbil Corporation (Wiring 2) 31

40 Wiring method for connecting multiple NWSs to a transmitter not made by Azbil Corporation To combine multiple NWSs with a transmitter not made by Azbil Corporation, follow the diagram shown below. Note: The input voltage drop of a NWS is 2.3 VDC. Calculate the number of NWSs that can be connected by adding up the internal impedance of each piece of equipment multi-dropped. Do not disconnect the jumper strip between the S+ terminals on the terminal board of the NWS terminal box. Figure 2-16 Combination of Multiple NWSs and a transmitter not made by Azbil Corporation 32

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43 3.1 Preparation Overview Check-up items Prerequisite This section describes the preparatory work before operating when the NWS is combined with an Azbil Corporation's Smart transmitter. If a transmitter not made by Azbil Corporation is combined with the NWS, refer to section 3-2 Operation. To operate the NWS correctly, check the following items: Check the status of the connected transmitter. - Identify the type (ST, STT, MagneW, SMT) of connected transmitter. - Check whether the communication mode is analog or digital. - Check the preset range (LRV, URV). Check the engineering unit. (The factory setting is %.) You need the following for connecting the NWS with an Azbil Corporation's Smart transmitter: SFC NWS Azbil Corporation's Smart transmitter Reading transmitter database Take the following procedure: Step Description 1 Check that the NWS and the SFC have been cabled and wired correctly. 2 Check that data setting of the transmitter has been completed before setting up the NWS. 3 Turn on the transmitter. Result: The NWS automatically starts self-diagnostic tests on startup. For detailed information, refer to Caution (1) on page Branch: If the transmitter is in DE output mode and configured for the DE 6-byte format, you can skip to Step 2 of Engineering Unit Selection (page 36). In this case, refer to Caution (2) on page 38. Press the ID A key on the SFC. Result: If the SFC displays DE XMTR xxxxxxxx, go to Step 5 (page 36). In the other cases, skip to Step 2 of Engineering Unit Selection (page 36). Continued on next page 35

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45 2 (Continued) Main unit hexagon locking screw Liquid crystal display Main unit hexagon locking screw Engineering unit and calibration code selection button Release the button when the desired code appears. Result: The numerical value and the desired engineering unit are displayed. Note: If the desired engineering unit is not available among the 8 built-in units, please ask an Azbil Corporation's representative for a stick-on label sheet of alternative engineering units. 3 You have completed the preparations for operating the NWS. 37

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50 Adjustment Using an SFC Overview If you combine the NWS with an Azbil Corporation's Smart transmitter, you can adjust the output display in constant current mode without a current generator. 0 % (LRV) adjustment Perform the following procedure. Step Description 1 Caution: Be sure to set the control loop to manual before turning on the SFC. 2 Turn on the SFC and start communications. (For the wiring procedure, see page 29.) 3 Set SFC to 4 ma (0 %). OUTPUT + 0 (zero) + ENTER 4 Dismount the cover of the NWS main unit. 5 Press and hold down the engineering unit/calibration code selection button at the bottom left of the NWS. (See the illustration on page 37.) Release the button when CALL appears in the display field. 100 % (URV) adjustment Take the following procedure. Result: You have completed 0 % (LRV) adjustment. Branch: If 100 % (URV) adjustment is necessary, go to the procedure for it. If 100 % (URV) adjustment is unnecessary, close the main unit cover securely. Step Description 1 Set SFC to 20 ma (100 %). OUTPUT ENTER 2 Press and hold down the engineering unit/calibration code selection button at the bottom left of the NWS. (See the illustration on page 37.) Release the button when CALL appears in the display field. Result: You have completed 100 % (URV) adjustment. 3 Press the OUTPUT and CLR keys in that order. Result: The output mode has been released. The process control has been reset to automatic mode. Continued on next page 42

51 4 Close the cover of the main unit securely. Note "bad" in the display means that the adjustment has failed because the 4 ma (0 %) signal or 20 ma (100 %) signal is not within the adjustable range of the NWS. Check that the current generator is OK and start the procedure again. 43

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69 Document Number: Document Name: OM NWS300 Field Type Smart Meter Date: 1st edition: Nov rd edition: Feb Issued/Edited by: Azbil Corporation

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