Output Analog Function Module-101

Transcription

1 Metasys Network Technical Manual 636 Function Modules Section Technical Bulletin Issue Date 0793 Output Analog Function Module-0 Introduction Page 3 Product Overview 3 Theory of Operation 3 Design Considerations Application Wiring Diagrams 5 0 to 0 ma 5 0 to 0 VDC 6 Commissioning Procedures 9 Overview 9 Assumptions 9 Installation 9 Setting the Software Span Device Verification Troubleshooting Procedures 3 Ordering Information Johnson Controls, Inc. Order No

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3 Introduction Product Overview Theory of Operation The Output Analog Function Module (FM-OAN0-0) provides two independent analog signals (0 to 0 ma) from a single FM slot controlled by a DCM0. Each channel operates in either an Auto or Manual mode. The OAN operates as follows (step numbers correspond to numbers in Figure ): l. The DCM0 provides a control signal.. The OAN latches the signal and converts it to a proportional 0 to 0 ma signal, which is conditioned and distributed as current control to the field device. A 0 to 0 VDC signal can also be controlled by use of an external resistor. In Auto mode, the signal remains under control of the DCM0. 3. Manually controlled Auto/Manual switches can disable the DCM0 control of the OAN outputs. The statuses of these switches are reported back to the DCM0.. With an Auto/Manual switch in the Manual position, the module output is controlled by a manual adjustment on the OAN. (Clockwise increases the output.) BASE FRAME DCM 0 OAN Control Electronics Signal Conditioning Manual Adjustment 3 Auto Manual Current Control Field Device Signal Conditioning Manual Adjustment Auto Manual Current Control Field Device Figure : OAN Function Diagram OAN Function Modules Output Analog Function Module 0 3

4 Design Considerations The OAN must connect to a DCM0, which is communicating to an NCM00 (or higher) loaded with Release 5.0 (or later) software. The OAN provides two independent analog signals; it functions as a current source (not current control). Each output signal of the OAN is independently software-selectable: 0 to 0 ma or to 0 ma. (See Setting the Software Span, further on in this document.) Each output signal of the OAN can be converted from current to voltage by attaching a resistor, as shown under Applications Wiring Diagrams. A single OAN can control both current and voltage outputs. Function Modules Output Analog Function Module 0

5 Application Wiring Diagrams 0 to 0 ma Figures and 3 show the connections required to control 0 to 0 ma applications. Figure 3 s method uses only three wires. BASE FRAME DCM 0 OAN Control Electronics and Signal Conditioner M/A Switch & Pot. M/A Switch & Pot. Variable Current Source Variable Current Source TBF 6 5 Optional Optional 50 ft m ax. #8 AWG twisted pair Field Device # Field Device # TBF in right bay of NCU/NEU TBF in left bay of NCU/NEU Strip wire and insert into side face of TBF. Use set screw in front face to secure. OAN Figure : Connections for Proportional 0 to 0 ma Applications Figure 3 connects two separate field devices while using only three wires. BASE FRAME DCM 0 OAN Control Electronics and Signal Conditioner M/A Switch & Pot. M/A Switch & Pot. Variable Current Source Variable Current Source TBF ft max. #8 AWG twisted pair Field Device # Field Device # OANA Figure 3: 3-Wire Connections for Proportional 0 to 0 ma Applications Function Modules Output Analog Function Module 0 5

6 0 to 0 VDC Figure shows the required connections for one output of proportional 0 to 0 VDC (connected to field device ). Convert current to voltage by attaching a resistor to the output line. BASE FRAME DCM 0 OAN Control Electronics and Signal Conditioner M/A Switch & Pot. M/A Switch & Pot. Variable Current Source Variable Current Source TBF 6 5 Optional Optional 50 ft m ax. #8 AWG twisted pair Field Device # (Current) Field Device # (Voltage) 3 6 TBF in right bay of NCU/NEU 5 TBF in left bay of NCU/NEU Connect the resistor across the and - lines to convert to VDC. Place resistor near field device to eliminate line losses. Strip wire and insert into side face of TBF. Use set screw in front face to secure. OAN3 Figure : Connections for Proportional 0 to 0 Volt Applications The 0 to 0 VDC application requires that the software span is set to 0 to 0 ma. The OAN can control two current outputs, one current and one voltage output, or two voltage outputs. Use wire-wound or metal-film resistors, with % accuracy, and having a power rating of / watt. Position the resistors near the field device to avoid line length compensation. When converting to VDC, it is necessary to take into account the impedance of the field device. Table lists the size of resistor necessary to produce a desired voltage range, given the total impedance. (Standard % resistor sizes are listed at the end of each row to help match the appropriate resistor to a standard size.) For low-impedance devices (less than 500 ohms) use the current output. 6 Function Modules Output Analog Function Module 0

7 Table : Resistor Sizes Needed for Voltage Scale Versus Impedance Field Device Impedance (In Ohms) Req. Volt Scale 50K 0K 0K 5K K K 500 Some Standard % Resistor Values Calculated Parallel Resistance 0V No Resist. 99, 5 53, 59 56, V , 55 6, 87 33, 99 V , 0 05, 07 0, If additional offset adjustments are necessary to compensate for line length resistances, refer to adjustments to Linearization Parameter, as described in the Analog Input Object Technical Bulletin, in Vol. III of the Metasys Network Technical Manual. Function Modules Output Analog Function Module 0 7

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9 Commissioning Procedures Overview Assumptions Installation To commission an OAN Function Module:. Install the unit.. Set the software span to either 0 to 0 ma or to 0 ma. 3. Verify the field device performance. The following procedure for the physical installation of the Output Analog (OAN) Function Module assumes: Panel (NCU or NEU) modules are installed, complete with NCM00 (or later) and Operator Workstation (Release 5.0 or later) software. Connections to field devices are complete, and follow NEC and local codes. You have engineering drawings defining details for the installation. You are familiar with Metasys Network terminology, and the location and operation of power switches. For each OAN Function Module in the network, perform the following steps.. Check that both Auto/Manual switches are set to Manual.. Check that the potentiometer output is not set higher than the midrange position as shipped from the factory (Counter-Clockwise decreases output). A M Auto/Manual Switch A M A M Potentiometer (Clockwise Increases) OAN0 OAN Figure 5: OAN Auto/Manual Switch and Potentiometer Locations Note: If using a long screwdriver on the potentiometer, be careful to not over-torque the knob, which could damage either the potentiometer or the knob. Function Modules Output Analog Function Module 0 9

10 3. Refer to the engineering drawings, and identify the proper panel and slot number location for this module.. Install and latch the module in the appropriate slot by plugging it into the base frame by hand. (Described in the NCU/NEU Technical Bulletin.) 5. Verify that the point object defined in the System summary, the function module, and the field device are connected as defined by the engineering drawing. Ensure that you connect each device through terminal blocks corresponding to the subslot defined in software for that device: Channel refers to subslot, whose wires connect to terminal blocks and. Channel refers to subslot, whose wires connect to terminal blocks and 5. Channel (Subslot ) (Optional Shield) (-) () Channel (-) (Subslot ) () 3 6 Cabling to Left-hand Terminal Blocks 5 OAN5 Figure 6: Terminal Block Connections Leading to an OAN0 0 Function Modules Output Analog Function Module 0

11 Setting the Software Span Device Verification The OAN generates a default output range of 0 to 0 ma. Use software to generate an offset range of to 0 ma, through DDL, GPL, or on-line generation. The method is to select the appropriate Span Type for the device. Span Type 0 is used to generate the full output range. While designating a Span Type of 0, commanding the device to ma would require a command of 0% (assuming a span of 0 to 00). Span Type is used to generate the to 0 ma output range. While designating a Span Type of, commanding the device to ma would require a command of 0%. For more information about setting span types, refer to the Analog Output Digital Object Technical Bulletin, in Vol. III of the Metasys Network Technical Manual. Device verification assumes that the operating software for the network has been downloaded to the NCM controlling the panel, and the software span has been set. For each OAN Function Module on the network, perform the following steps.. Select the System summary that includes this OAN object.. Set the Auto/Manual switch to Auto. 3. Use the software s override command and verify that the object s Value attribute (as seen in the summary) matches the actual value for the field device. If the values do not match, refer to the troubleshooting chart in the next section. Function Modules Output Analog Function Module 0

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13 Troubleshooting Procedures Figure 7 (next page) is a troubleshooting flowchart that applies to failures between point objects and field devices connected through the OAN. Function Modules Output Analog Function Module 0 3

14 Start Set A/M switch to Auto. Does point status indicate "Auto" along with correct values? No Does the OAN connect to a DCM0, which communicates to an NCM00 or higher) with Release 5.0 (or higher)? No Replace the DCM0 with a DCM0; Replace the NCM0 with an NCM00; Install Release 5.0 (or higher). Yes Stop Yes Is the object defined correctly (DCM as a DCM0)? No Fix definition. See Operator Workstation User's Manual. Yes Is 0-0mA/ - 0 ma span set correctly? Yes No Set correct span in software. See Analog Output Digital Object Technical Bulletin. Is D CM error LED off and is N polling and responding? No Troubleshoot DCM. See DCM Technical Bulletin. Yes Use DVM to check FM output. Okay? Yes No Replace FM. Refer to Material Return and Allowance Program, Procedure 3C700 fo r information on returning defective FMs. Use DVM to check field device input. Okay? No Troubleshoot connections and wiring. Yes Repair or replace field device if JCI is responsible. OANTS Figure 7: OAN Troubleshooting Function Modules Output Analog Function Module 0

15 Ordering Information Description Output Analog Function Module Product Code Number FM-OAN0-0 There is no replacement part to the OAN FM. Function Modules Output Analog Function Module 0 5

16 Notes Controls Group FAN E. Michigan Street Metasys Network Technical Manual P.O. Box 3 Revision Date 0793 Milwaukee, WI 530 Printed in U.S.A. 6 Function Modules Output Analog Function Module 0