Preface - Spectrum Controls, Inc.
Contents
1. 15 Monitor bit 4 of channel 7 input status word 2 I e 15 When this bit is a 1 Preset Fault Value set then set the channel 7 configuration back to its original value with the addition of setting the channel 7 configuration word to preset output on fault bit 13 Channel 7 Configuration Word 0 0 1 0 0 0 0 0 0 0 0 1 0 0 1 1 If a fault is detected then the output for channel 7 will go to 12 mA Set Output Behavior under Fault Condition configuration bits 12 13 This setting allows the user to define the output state when a fault condition occurs The output may be set to reset hold current value or go to a preset value In Class 1 operation of the output will be set to the reset value when a fault condition occurs One exception for Class 1 is if the module s chassis slot is disabled Then the output will hold it s current value 30 SLC 500 Analog Output Modules 10v 8v munsunnuna Goto Preset a D a D 2v 1mm imam ama Hold Current Value e d A s Ov C Go to Reset Value Fault occurs 10 v Note Ifa channel is configured to preset output on fault bit 12 0 and bit 13 1 and no preset fault value was previously set then the output will go to the reset value OV or OmA when a fault condition occurs Note It is recommended that reset output on fault is set when a channel is disabled2. A fault is defined as 1 CPU Fault 2 Rack power goes away while the external 24V power remains Note When the rack power is restored the channel outputs will go to the reset power state during power on self test After this the channels will output their commanded values if enabled with a valid configuration 3 CPU goes out of run mode 4 The modules chassis slot is disabled Note In Class 1 operation the output will hold the current value when the module s chassis slot is disabled Alarms Latch configuration bit 14 This setting allows certain alarms to remain latched This can be useful if alarm conditions need to be acknowledged by an operator Over Under Limit Over Under Range Output at low high Clamp Alarm Open Current Loop and 24v Power Failure alarms are latched when this feature is enabled Channel Configuration Error Fatal Channel Error and Module SLC Resetting alarms are not latched and unaffected by this feature setting Channel e Configuration And Status Class 1 and 3 Lei l e 6 Ier Chapter 4 Using Your Output Module 31 Note The set and clear parameter feature bits Bits 7 and 8 of the channel configuration word must be zero for the latched alarms to operate When the Latch Alarms configuration bit is cleared for a channel then the alarm bit allows the alarm condition Ifthe alarm condition occurs then the alarm bit is set Ifthe alarm condition goes away then the alarms bit is cleared
3. Who Should Use This Guide What This Guide Covers Related Allen Bradley Documents Preface Read this preface to familiarize yourself with the rest of the owner s guide This preface covers e who should use this guide e what this guide covers e related Allen Bradley documents e terms amp abbreviations you should know Use this guide if you design install program or maintain a control system that uses Allen Bradley Small Logic Controllers You should have a basic understanding of SLC 500 products You should also understand electronic process control and the ladder program instructions required to generate the electronic signals that control your application If you do not contact your local Allen Bradley representative for the proper training before using these products This guide covers the 1746sc NO8i and 1746sc NO8v analog output modules It contains the information you need to install wire use and maintain these modules It also provides diagnostic and troubleshooting help should the need arise Table 1 lists several Allen Bradley documents that may help you as you use these products vi SLC 500 Analog Output Modules Terms amp Abbreviations You Should Know Table 1 Related Allen Bradley documents Allen Bradley Doc No Title 1747 2 30 SLC 500 System Overview SGI 1 1 Application Considerations for Solid State Controls 1770 4 1 Allen Bradley Programmable Controller Grounding and Wiring Gu
4. Strip about 3 16 in about 5 mm of insulation away to expose the end of each wire 7 Chapter 2 Installing And Wiring Your Module 11 At one end of the cable twist the shield wire and foil shield together bend them away from the cable and apply shrink wrap At the other end of the cable cut the drain wire and foil shield back to the cable and apply shrink wrap Insulation Black Wire Clear Wire Connect the wires to the terminal block and field device as shown in the following figures and table The recommended maximum torque is 5 in lb 0 565 Nm for all terminal screws Repeat steps 1 through 6 for each channel on your module A system may malfunction due to a change in its operating environment After installing and wiring your module check system operation See the Allen Bradley system Installation and Operation Manual for more information 12 SLC 500 Analog Output Modules Labeling And Re Installing The Terminal Block if itis removed Figure 2 Wiring diagrams V Out 0 L COMO V Out 1 L COM 1 V Out 2 L COM 2 L COM 3 V Out 4 d A ANL COM 4 Out 0 L COMO IOut1 L COM 1 Out 2 L COM 2 lOut3 L COM 3 Out 4 Out5 Out 6 Out 7 24 VDC 1746sc NO8i The supplied terminal cover has a write on label Using this label helps ensure that the terminal block is installed on the correct module Once you have wired your module and properly labeled th
5. 15 Channel 0 Configuration Word 0 Oie 8 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 1 Figure 5 Example relationship between output signal and channel data 20 5mA 3 5mA 100 9999 Address O e 8 Address O e 8 Address O e 8 15 Chapter 4 Using Your Output Module 25 Output Clamping For added safety the 1746sc NO8i and 1746sc NO8v output modules let you define limits for the values in the output data words individually for all eight channels These data limits in turn limit the output signals that your module provides When an output data word exceeds the data limit the output value is truncated to the limit You can use output data limiting to prevent PID loops from exceeding safety limits to prevent operators from inadvertently setting incorrect values etc The low clamping limit output data parameter 1 is the value which the output signal will not go below The high clamping limit output data parameter 2 is the value which the output signal will not go above For some ranges and formats the clamp alarms will occur a few counts from the set clamping values This means you may need to command an output value lower or higher than the output clamping limits in order to get output at low high clamp alarms The low clamp limit value must be lower than the high clamp limit value Example Suppose you have a valve connected to channe
6. 6 T T T T 1 T T T T T T Dei Channel 7 L L L L J L L L L L L i T T T 1 T T ii T T T O e 8 Channel 0 o A 9 Il T T T CH i I 1 T i T T T e anne i e Configuration s I T T T 1 I T I T T T Output O e 14 Channel 6 T TI TI T T O e 15 Channel 7 0 e 16 GR Channel 0 l GE T T 0 e 17 Channel Sai Class 3 een i Output Data a en e Parameter 1 O e 22 Channel 6 T TI Flt T Dei Channel 7 Dei GENEE Channel 0 GE 0 e 25 ERC Channel 1 II E ee e Output Data k CHE EEN e Parameter 2 O e 30 Channel 6 T T T 0 e 31 1 eem Channel 7 SLC 500 Analog Output Modules Input Image l e 0 Lei l e 6 Ier Le 8 Leid l e 15 Class 1 The 8 word input image defined as the input from your module to the SLC processor holds the data received by your module and provides the status configuration and operational state of each channel Class 3 The 16 Word input image holds the data defined as the input from your module to the SLC processor holds the data of each channel received by your module and also provides the extended feature set status and alarming for each channel Important Class 3 features for any particular channel will only be active if the channel is enabled Disabled channels will output OV OmA no matter what features are configured Figure 5 Input Image Input Image Function 1 T T T T 1 T T T T 1 T T T T Channel 0 St
7. Analog Output Modules Ladder Logic Sample Output At High Clamp Alarm Status Bit 10 This bit indicates that the channel output data value is being commanded to go above the user defined high clamp value Low Limit Alarm Status Bit 11 This bit indicates that the channel output has gone below the user defined limit low limit alarm value High Limit Alarms Status Bit 12 This bit indicates that the channel output has gone above a user defined high limit alarm value Under Range Alarm Status Bit 13 This bit indicates that the channel data value is being commanded to go below the selected output range Over Range Alarm Status Bit 14 This bit indicates that the channel data value is being commanded to go above the selected output range Channel Configuration Error Status Bit 15 This bit indicates that a channel configuration error has occured Review the configuration word for setting descriptions MOY Move Source 20000 20000 lt Dest 0 1 24 10000 lt Chapter 4 Using Your Output Module 37 1 1 8 0001 1 OTHER MOY Move Source 10000 10000 lt Dest 0 1 24 10000 lt 0002 OTHER 1 842 gt CHO_LIMIT_AL_SET 0003 38 SLC 500 Analog Output Modules Inspecting Your Module Chapter 5 Testing Your Module Read this chapter to prevent potential problems This chapter covers e inspecting your module e disconnecting prime movers e powering up e interpreting the LED indica
8. East Bellevue Washington 98005 U S A Importer s Name Spectrum Controls Inc Importer s Address 2700 Richards Road South East Bellevue Washington 98005 U S A Type Of Equipment Allen Bradley SLC500 Compatible YO Modules Model No 1746sc Series I the undersigned hereby declare that the equipment specified above conforms to the above Directive s and Standard s Date Of Issue td f Signature Place Bellevue Washington U S A Bruce M Wanta Name SPECTRUM Chairman Position SPN 0300148 02 Rev B 0 ti Mira Mg f gt Ee A lt NEM PASO GLOBAL PARTNER The ENCOMPASS logo and SLC 500 are trademarks of Allen Bradley Company Inc Copyright 2002 2003 Spectrum Controls Inc All rights reserved Printed in U S A Specifications subject to change without notice Publication 0300187 02 Rev B April 2003 U S A Headquarters Northeastern U S A Sales Office Southeastern U S A Sales Office PO Box5533 48945 VanDyke Suite4B 5300RegencyLakeCt Bellevue WA 98006 Utica MI 48317 SugarHill Georgia30518 Fax 425 641 9473 Fax 686 7312715 Fax 770614 5886 Tel 425 746 9481 Tel 586 731 2397 Tel 770 614 5885 Web Site http www spectrumcontrols com E mail spectrum spectrumcontrols com Sa SPECTRUM C O N T R O L S
9. To correct this remove the NO8 module from the I O configuration listre add it per the instructions above Class 1 The 8 word output image defined as the output from the SLC processor to your module represents the following for the NO8i v e The output data words control output signal levels for each channel Class 3 The 32 word output image defined as the output from the SLC processor to your module represents the following for the NO8i v e The output data words control output signal levels for each channel e The configuration bytes replace configuration DIP switches on your module In your output module each word configures one channel e The output data parameters 1 and 2 typically define low and high values for items such as limit alarms and output clamping Ramping and preset output on fault only use output data parameter 1 Refer to Figure 4 for addition information For more information on the user defined scale output clamping limit alarms ramping and preset output on fault see Setting The Optional Feature Values later in this chapter Figure 4 Output Image Chapter 4 Using Your Output Module 17 Output Image Function T T T T 1 T T T T T T Dei Channel 0 T T T T 1 T T T T T T Dei Channel 1 L 1 1 1 i L 1 L 1 1 1 e E e Output Data Class 1 T T T 1 T T T T e Dep Channel
10. ada eta 38 Interpreting The e RBC 39 Interpreting VO Error Codes iii 40 TOUDIESHO OU DE soseta catea ta aaa es cases cala al aaa cn a afl alani geed ca 40 Maintaining Your Module And Ensuring Safety ii 4 Preventive Maintenance usi ER La tants a a a Ba aa a 4 Safety Comsideratrons scena coca age oana AR oa a aaa a ta ali dana ali at dna date ate 41 Declaration of geet EE xxxvii General Features And Benefits Chapter 1 Overview And Specifications The 1746sc NO8i provides eight channels of current outputs while the 1746sc NO8v provides eight channels of voltage outputs In both modules the current or voltage ranges are independently configurable for each channel These modules also provide new advanced features to make your control systems more dependable and flexible Read this chapter to familiarize yourself further with your isolated analog module shown above This chapter covers e general features and benefits e detailed specifications Increased System Accuracy and Reliability Both modules provide 8 output channels with a high usable resolution They also provide 500 Vdc field wiring to backplane isolation to protect the processor and rack These modules maintain their accuracy with fluctuating ambient temperatures which is important for crowded control cabinets Reduced System Costs Several low density modules may be replaced with one eight channel module They also provide a single slot so
11. second This means if the channel was commanded to go from 2 to 8 volts it would take 8 2 4 1 5 seconds to get there Example Suppose you have a valve connected to channel 4 with a 4 20mA operating range and you want to use PID format You would use the following bit settings for the channel 4 configuration word Address 15 Channel 4 Configuration Word 0 0 e 12 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 1 Suppose also that you would like the output to change no more than 1 5 mA per second Since the ramping value is expressed as 0 1 mA per second your value would be 1 5 0 1 15 You would enter the following 28 SLC 500 Analog Output Modules Address O e 12 Address O e 12 Address O e 15 for channel 4 data parameter 1 Note data parameter 2 is not used for ramping O e 20 Value 15 decimal Ch 4 Data Parameter 1 1 5mA per second Now set the proper bits in the channel 4 configuration word 15 Channel 4 Configuration Word 0 0 0 0 0 1 010 1 0 01 0 0101111 Monitor bit 3 of channel 4 input status word 2 I e 12 When this bit is a 1 Ramping Rate Limiting value set then set the channel 4 configuration back to its original value 15 Channel 4 Configuration Word 0 0 0 0 0 0 0 0 0 0 0 1 0 0101
12. starter coil verifying that the output circuit is wired correctly and functioning e Disconnect solenoids by disengaging the solenoid valves leaving the coils connected If you cannot disconnect a device in the preferred way open the output circuit as close as possible to the motion causing device Example If you have a relay coil that in turn energizes a motor starter and you cannot disconnect the motor wires open the circuit at a point between the motor starter and the relay contact WARNING POSSIBLE UNEXPECTED MACHINE MOTION During all testing always disconnectall devices that when energized might cause machine motion Failure to observe this precaution can cause equipment damage or personal injury When you apply power to the system your module s LEDs should illuminate indicating that your module is receiving power and has completed its onboard self test If the LEDs do not illuminate after several seconds your module is not functional Discontinue testing until you can get the LEDs to illuminate The most probable reasons for the LED not illuminating are e The SLC 500 system is not receiving power from its power supply e The rest of the SLC 500 system is not receiving power e The rack slot where your module is located is defective e Your module is defective Chapter 5 Testing Your Module 39 Interpreting The LED Indicators Your output module has 9 LEDs 8 channel status LEDs numbered 0 7 for
13. 0 decimal Now set the proper bits in the channel 6 configuration word Address 15 Channel 6 Configuration Word 0 0 e 14 0 0 0 0 0 1 1 1 0 0 0 0 0 1 0 1 Monitor Bit 2 of the channel 6 input word 2 I e 14 when the bit is a 1 Limit Alarms Valves Set then set the channel 6 configuration back to it s original value Address 15 Channel 6 Configuration Word 0 O e 14 0 0 0 0 0 ojojo 0 0 0 0 DA Set Ramping Rate Limiting Values This feature allows the output to change at a user configured rate It limits the rate at which the output will change This can be set on a channel by channel basis The Ramping Rate Limiting value for a channel is configured by placing the desired value into the Output Data Parameter Word 1 for the desired channel then setting the Output Configuration Word for the channel to Set the Ramping Rate Limiting Value The ramping rate limiting value that is placed in the output data parameter 1 can be calculated by using the following equation 1746 NO8v Value Change in Volts seconds for the change 10 1746 NO8i Value Change in Current seconds for the change 10 The Ramping Rate Limiting value is defined as 100mv second for the voltage card and 0 1ma second for the current card for all data formats and data ranges For example a value of 40 equates to 4 volts
14. 021 mA 0 432767 OmA 21 mA 420 mA 6242 31208 4mA 20mA Engineering Units 10V 10250 10250 10 25 V 10 25 V 010V 500 10250 0 50V 10 25V DAN 500 5500 0 50 V 5 50 V 1 5 V 500 5500 0 50 V 5 50 V 020 mA 0 20500 0 0mA 20 5mA 021 mA 0 21500 0 0mA 21 5mA 420 mA 3500 20500 3 5mA 20 5mA Scaled for PID 10 V 0 16383 10 V 10V 0 10V 0 16383 UN 10V LAN 0 16383 UN 5V 1 5V 0 16383 1V 5V 0 20mA 0 16383 OmA 20 mA 0 21 mA 0 16383 OmA 21 mA 420 mA 0 16383 4mA 20mA Proportional Counts 10 V 32768 32767 10 25 V 10 25 V 010V 32768 32767 0 50 V 10 25 V DAN 32768 32767 0 50 V 5 50 V 1 5V 32768 32767 0 50 V 5 50 V 020 mA 32768 32767 0 0mA 20 5mA 021 mA 32768 32767 0 0mA 21 5mA 420 mA 32768 32767 35mA 20 5mA User Defined 10V 10 25 V 10 25V Scale 010V 0 50V 10 25V DAN 0 50V 5 50 V See note 2 1 5V 0 50 V 5 50 V 020 mA 0 0mA 20 5mA 021 mA 00mA 21 5mA 420 mA 3 5mA 20 5mA 1 Provides direct compatibility with the 1746 NO4 module 2 For the user defined scale the data in output data parameter word 1 and 2 determine the count limits See the next subsection User Defined Scale for information on the User Defined Scale data format ER SLC 500 Analog Output Modules Set Optional Feature Values configuration bits 7 11 Class 3 Only Setting The Output Data Words Class 3 Only These bits are used to load the values from data parameter 1 and 2 into the corres
15. 111 Ramping is now active Set Preset Fault Value This feature allows the user to define a preset output value for a fault condition The value for a channel is configured by placing the desired value into the Output Data Parameter Word 1 for the desired channel then setting the Output Configuration Word for the channel to Set the Preset Value The module will revert to this value when a fault condition occurs if the preset output on fault is set Example Suppose you have a valve connected to channel 7 with a 4 20mA operating range and you want to use Engineering Units format You would use the following bit settings for the channel 7 configuration word 15 Channel 7 Configuration Word 0 0 0 0 0 0 0 0 0 0101011 0101111 Suppose also that you would like the output to go to 12 mA ifa fault condition occurred such as the SLC went into program mode See Set Output Behavior under Fault Condition section for information about fault conditions You would enter the following for channel 7 data parameter 1 Note data parameter 2 is not used for the Preset Fault Value O e 15 12000 decimal Channel 7 data parameter Address O e 15 Address O e 15 15 Chapter 4 Using Your Output Module 29 Now set the proper bits in the channel 7 configuration word Channel 7 Configuration Word 0 0 0 0 1 0 1 1 0 0 0 1 0 0 1 1
16. C 500 Analog Output Modules You select the data format for each channel using that channel s configuration bits described in the previous subsection Configuring Each Output Channel The user low value Output Data Parameter 1 is the value that will set the output to the selected output range s minimum value Similarly the user high value Output Data Parameter 2 is the output data value that will set the output range s maximum value Example Suppose you have a valve connected to channel 0 with a 4 20 mA range and you want your scale to go from 100 to 9999 counts For a 4 20 mA output with user defined scaling your module sets the signal limits to 3 5 mA and 20 5 mA see Table 10 Enter 100 and 9999 into output words 16 and 24 respectively and setting the output configuration word for the channel to set the user defined scale values and be in user defined scale the relationship between data value counts and output signal would be as follows O e 16 value 100 decimal Ch 0 data parameter 1 O e 24 value 9999 decimal Ch 0 data parameter 2 Now set the proper bits in the channel 0 configuration word Address 15 Channel 0 Configuration Word 0 O e 8 0 0 0 0 0 0 1 1 0111010 RONN Monitor Bit 0 of channel 0 input status word 2 I e 8 When this bit is 1 user scaling values set then set the channel 0 configuration to be User Scaling Address
17. Di 1 1 User defined scale 1 0 0 Invalid I Od Invalid O Invalid N hr Invalid TV Power Failure E RP Ge E IE EA Current Loop Open Pot ES ERE ERE S ES KS ES ST Module SLC Resetting SS E E DEE EE EH EES PEN ERE EN DE ES Eee Fatal Channel Error i ft tT t fy tf ttt S S l Output Enable Echo Status Bit 0 This bit shows the current channel status The channel is enabled when this bit echo is 1 Output Range Echo Status Bits 1 2 These bits echo the current output range for the active channel Unused Status Bit 3 Scale Echo Status Bits 4 6 This bit shows the current channel format setting Unused Status Bits 7 11 Chapter 4 Using Your Output Module 33 24 V Power Failure Echo Status Bit 12 This bit is set to one if the external 24V DC power supply being used Selected via Jumper J4 has failed The external 24VDC is used to power the analog output circuitry This bit will clear when the external 24VDC supply is present and if the Latch Alarms feature is enabled the Reset Latched Alarms bit has been set or toggled Open Current Loop Status Bit 13 This bit is set to one if there is no load open loop on the output channel Open loop detect will only be indicated ifthe current being commanded is greater than 0 1ma Invalid open loop detection may occur if the channel load resistance is greater than the specified maximum resistance of 500 ohms or less than 0 1ma is commanded This bit will clear when the channel is n
18. Reset Latched Alarms configuration bits 15 When the Latched Alarms configuration bit is set for a channel and if the alarm condition occurs and goes away the bit stays set Only if the alarm condition is gone and the Reset Latched Alarms configuration bit is set will the alarm bit be cleared Ifthe alarm condition exists and the Reset Latched Alarms configuration bit is set the alarm bit stays set Words 0 through 7 of the input image file addresses I e 0 through I e 7 reflect the configuration and status of each channel Use the data provided in these status words to determine various channel conditions Input Image Function Channel 0 Status 1 Channel 1 Status 1 sea 1 Input Status 1 Ge T 1 T T T 1 T T T Class 3 Channel 6 Status 1 Channel 7 Status 1 32 SLC 500 Analog Output Modules Table 12 Channel Status 1 word details Input Words 0 7 l e 0 through l e 7 for Ch 0 7 respectively 10 Vdc output range NO8v To select Use these bit settings 15 14 13 12 11 10 9 8 7 6 0 SE SS i S T f i Output channel disabled Output channel enabled 0 21 mA output Range NO8i 1 5 Vdc output range NO8v 4 3 2 1 _ Ul UI SENGE 4 20mA output range NO8i eee 0 20mA output range NO81 e ee ee N A output range NO8i Invalid 1746 NO4 compatible format 0 0 0 Engineering units 0 OF 1 Scaled for PID Oo 1 0 Proportional counts
19. See also effective resolution Status word Contains status information about the channel s current configuration and operational state You can use this information in your ladder program to determine whether the channel data word is valid Step response time The time required for the output signal to reach 95 of its expected final value given a full scale step change in the output data word viii SLC 500 Analog Output Modules Contents PE Cao fii at pai a aa aaa ARA v Who Should Use This E iora ear v What This Guide E EE v Related Allen Bradley Documents nai eat edi iau ata aaa ie v Table 1 Related Allen Bradley documents vi Terms amp Abbreviations You Should Know vi Overview And aere det l General Features And Benefits aia cae aa a i en ine a aaa i ed aaa 1 Detailed Spec ication Sireen E E S a setseesaeae 2 Table 2 Electrical specifications module eei eee 2 Table 3 Electrical specifications outputs EE 3 Table 4 Physical specifications areali ade A 3 Fable 5 Environmental specifications nn sacosa cota ae ca baia ata stana ani esita ont ei D eg Installing And Wiring Your Modules 5 Avoiding Electrostatic Damage irns ea pic sia aa E and tres EA E A E iau 6 Determining Power Requirements nuance 6 Setting The Jumper JA scai cea ca cva e leale aaa a Mid pt ta H Selec Hne Ee EE 8 Inserting Your Module In o The Rack sees urea aper a 3 aaa nada antes 8 Waring Your elt c aa ciao ri 10 La
20. Temperature 40 to 85 C 40 to 185 F Relative Humidity 5 to 95 non condensing Certifications UL CUL and CE Hazardous Environment Classifications Class I Division 2 Groups ABCD Chapter2 Installing And Wiring Your Module Read this chapter to install and wire your module This chapter covers e avoiding electrostatic damage e determining power requirements e setting the external power jumper e selecting a rack slot e inserting your module into the rack e wiring your module Note that although your module has a jumper in the center of it s printed circuit board this jumper is for the manufacturer s use only Also your module was calibrated by the manufacturer so you don t need to perform this task Important For UL and CUL compliance power and input output I O wiring must be in accordance with Class I Division 2 wiring methods Article 501 4 b of the National Electrical Code NFPA 70 and in accordance with the authority having jurisdiction Also you must observe the warnings shown below Failure to observe these warnings can cause personal injury WARNING EXPLOSIONHAZARD Substitution of components may impair suitability for Class Division 2 When in hazardous locations tum off power before replacing or wiring modules Do not disconnect equipment unless power has been switched offorthe area is known to benon hazardous 6 SLC 500 Analog Output Modules The following documents co
21. alues Set Limit Alarm Values Set Ramping Rate Limiting Values Set Preset Fault Values Invalid Invalid Reset Output on Fault Hold Output on Fault Preset Output on Fault Invalid Latch Alarms Reset Latched Alarms Je om Coe i S CO 9 oro l RE PR INI II A configuration error will occur if these bits are set to at the same time D 20 SLC 500 Analog Output Modules Output Channel Enable configuration bit 0 Use this bit to enable or disable a channel Output Range configuration bits 1 2 Use this bit field to configure the channel voltage or current output range for the type of output device you have connected to the module Data Format configuration bits 4 6 Use this bit field to select one of the following formats e 1746 NO4 compatible format the format used by the 1746 NO4 e engineering units mV or nA e scaled for PID works with the SLC PID instruction e proportional counts two s complement binary e user defined scale These data formats and ranges are defined in the following table Chapter 4 Using Your Output Module 21 Table 10 Data format definitions Selected Data Value counts Corresponding Signal Data Format Output Range Min Max Min Max 1746 NO4 10V 32768 32767 10V 10V Compatible 0 10V 0 32767 DN 10V See Note 1 0 5V 0 16384 DV 5V 1 5V 3277 16384 V 5V 0 20mA 0 31208 OmA 20mA
22. atus 1 TT Chamel 1Status4 TT d T T T T 1 T T T T 1 T T T e SE Class 1 Channel 6 Status 1 1 T T T T 1 T T T T 1 T T T T Channel 7 Status 1 1 T T T T 1 T T T T 1 T T T T Channel 0 Status 2 117 Channel statua TTT Class 3 Input Status 2 Channel 6 Status 2 Channel 7 Status 2 Configuring Each Output Channel Table 9 Channel configuration word details Output Words 8 15 O e 8 through O e 15 for Ch 0 7 respectively Class 3 Only After installing your module you must configure each channel by setting bit values in each configuration word Input words 8 Chapter 4 Using Your Output Module through 15 of the input image file addresses O e 8 and O e 15 configure channels 0 7 respectively Refer to Figure 4 for specific addressing Toselect Use these bit settings 15 14 13 12 11 10 9 2 1 ES DEER EE ee Output channel disable 0 Output channel enable l 10 Vdc output range NO8v 0 21 mA output Range NOS 1 5 Vdc output range NO8v 4 20mA output range NO8i 0 5 Vdc output range NO8v only 0 20mA output range NO81 0 10 Vdc output range NO8v only N A output range NO8i invalid 1746 NO4 compatible format Engineering units Scaled for PID Proportional counts User defined scale Invalid Invalid Invalid Oo O CO D o Oo e Oo 9 Clear Parameter Set Parameter No Action Set User Scaling Values Set Clamping V
23. beling And Re Installing The Terminal Block if it is removed eee nenea nana aaa 12 Things To Consider Before Using Your Module nn ceeace aaa ata paote aicea 13 How The Processor Communicates With Your Module 13 Channel Update Time Lian ee EE EE 13 Your Module s Response To Slot Disabling lie 14 Channel Configuration Data and Stili eege 15 Entering Your Module sID Code cate aaa ateu T atu E a Bia Da E E E ES 15 Output IMAGE autor ie E EEEE ad REE ENEE RO a aaa NE 16 Input IMape ela a aa fat Rao dada Da ata do E a pda ae aaa datata aaa Pa ada auto boa 18 Configuring Each Output Channel ir iaia iva Oa sl i c 19 Set Optional Feature Values Class 3 Only 22 Setting The Output Data Words Class 3 Only 22 Optional Features Class 3 Only Vreren datata aaa astea E aaa aaa 23 RE RE e 23 Output Clamping rie e a tc ia a d IAA teva abana A aaa tu i aTa 25 Set Limit Alarm E EE 26 Set Ramping Rate Limiting Values scri rec 27 Set Preset Fault Value asia oaia na cd a a aaa li a a pa ala 28 Channel s Configuration And Status Class 1 and 31 31 Chanel Input Status Word 2 Class 3 Only ceea ee nana na nana a ana 34 Ladder Logic Sample vasseiscessatscvsesecerteneciceaes ara ada data aaa dei etno dadea cada a 36 Testing Your RR RR O ORA 37 Inspecting Your Module sesser aerae E E i e n ia oal d aia eege tee 37 Disconnecting Prone MOVEES cases cap ae e Eaa E EEE E ES 38 Powering Up drain pot Da ta cea aaa RN da Deal ada
24. channels 0 7 respectively and 1 module status LED Figure 6 LED block TI OUTPUT CHANNEL STATUS Giel MODULE _ ANALOG Use the following table to interpret the LEDs Table 12 LED definition Ifthe module Andthe channel status LEDis status LEDis Then On On The channel is enabled 1 Blink Open circuit Unused configuration word bits are set Illegal range Illegal format Illegal parameter ID User range error e g User mm gt User_max Clamp range error Illegal fault action O 0 JN SA Ul P W N Ilegal ramp value 10 Illegal limit range Il Illegal preset 12 Illegal Optional Features Off Either your module is powering up or the channel is disabled 1 Blink 24V power fail Configuration error EEPROM fault SPIOGA2 RAM fault SPIOGA2 Input Access ERROR SPIOGA2 Output Access ERROR ROMCRC failed a DH Ul A W N Note Ifthe module is configured to use an external 24V supply the supply must be turned on for the module to operate Ifthe external 24V supply is turned off the module s outputs will be turned off and the module s processor will be reset until power is restored 40 SLC 500 Analog Output Modules Interpreting I O Error Codes Troubleshooting I O error codes appear in word S 6 of the SLC processor status file The first two digits of the error code identify the slot in hexadecimal with the error The last two digits identify the I O error code in hexa
25. decimal The error codes that apply to your module include in hexadecimal e 50 SE e 71 watchdog error 90 94 For a description of the error codes refer to the Allen Bradley Advanced Programming Software APS Reference Manual Allen Bradley publication 1746 6 11 Figure 7 Problem resolution flowchart Check LEDs on module Module Module Status LED Status LED off on Module fault D D condition Channel Channel Channel Status LED s Status LED s Status LED s I blinking off on Sg n sep ti Y that module is Fault Channel is Channel is seated properly condition not enabled enabled but not Cycle power working Check channel Enable channel if Verify module power status word desired by setting external and or bits 12 15 channel config rack Retry word bit 0 1 Retry Bit 15 Fatal channel error Reset the End H 1 t processor or cycle power to your Is problem Yes End set 1 module corrected n Bit 14 The Module or SLC processor Lag pp ren rei 7 Contact you local H d distributor or om 7 Spectrum Is problem Yes Controls corrected End Jee e loop for this channel LJ set 1 Contact you local 24 Volt Power Failure Check distributor or Ly Bit12 __lextemal supply is ee Spectru
26. dule 7 Table 6 Backplane current consumed 24Vdc Catalog Number 5Vdc w o ext supply w ext supply 1746 sc NO8i 120mA 250mA OmA 1746sc NO8v 120mA 160mA OmA The 1746sc NO8i and 1746sc NO8v output modules can use an external 24 Vdc power supply to reduce backplane loading To use an external 24 Vdc power supply you must set your module s jumper J4 as indicated in the following subsection To comply with the U L regulation the external supply must be rated N E C Class 2 Use Table 6 to calculate the total load on the system power supply For more information see the Allen Bradley system Installation and Operation Manual The 1746sc NO8i and 1746sc NO8v output modules have an external 24 Vdc power jumper J4 giving you the option of using an external power supply e With the jumper in the 1 2 Shorted position the module draws all its power from the backplane of the SLC system d 1 2 3 Rack Ext e With the jumper in the 2 3 Shorted position the module draws its 24 Vdc power from an external power source however the module still draws its 5 Vdc power from the backplane o 1 2 3 Rack Ext The jumper J4 is located in the bottom right corner of the module s circuit board next to the power supply Note Before setting J4 all system power must be turned off This includes the rack power as well as the optional 24V external supply Note Ifthe module is configured to use an external 24V supply the s
27. e 13 Channel Input Status 2 Word Details Input Words 8 through 15 l e 8 through l e 15 Input Status 2 Ch 0 7 16 bits per Channel User Scaling Values Set Clamping Values Set Limit Alarm Values Set Ramping Rate Limiting Values Set Preset Fault Value Set Reset Output On Fault Hold Output On Fault Preset Output On Fault Alarms Will Be Latched Output At Low Clamp Alarm Output At High Clamp Alarm Low Limit Alarm High Limit Alarm Under Range Alarm Over Range Alarm Channel Configuration Error 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 ass AREE RZEN Set e e e ce ee e a aa SS p RER FR TTT CITT OCI Lil RS i n WT ES ER ES EST EE ER E RS PR AI E LL Lil ot Kam ee LL RS EE ERE ea EE EE St EH EES Rena l Chapter 4 Using Your Output Module 35 User Scaling Values Set Status Bit 0 This bit indicates that user scaling values have been set for this channel If the channel format is user scaling and the channel is enabled user scaling is active Clamping Values Set Status Bit 1 This bit indicates that clamping values have been set for the channel If the channel is enabled then clamping is active Limit Alarm Values Set Status Bit 2 This bit indicates that limit alarms have been set for the channel If the channel is enabled then limit alarms is active Ramping Rate Limiting Value Set Status Bit 3 This bit indicates that ramping rate limiting ha
28. e terminal cover install the terminal block on your module 1 Align the terminal block with the receptacle 2 Insert the terminal block and press firmly at the top and bottom until it is properly seated 3 Screw in the two retaining screws on the top and bottom of the terminal block Chapter 3 Things To Consider Before Using Your Module Read this chapter to familiarize yourself with e how the processor communicates with your module e channel update time e your module s response to slot disabling How The Processor Your processor transfers data to and receives data from the processor Communicates With Your through an image table residing in the data files of your processor The Module processor updates this image table once during each scan of your ladder program Figure 4 shows the image table for your output module Figure 3 Output and input scans SLC 5 02 05 Module Data Files Image Table Output EES Scan statute a Sie Ae ss Output Image Output Image 8 Words Class 1 32 Words Class 3 Input Slot e Si sel e secolo Input Image Input Image 8 Words Class 1 16 Words Class 3 Channel Update Time For an output module channel update time is the time required for the module to convert the channel data received from the processor to an analog output signal at the terminals 14 SLC 500 Analog Output Modules Your Module s Response To Slot Disabling Channel update time
29. he conversion produces an analog output signal whose magnitude is proportional to the digital value Data scaling The data format that you select to define the logical increments of the channel data word Preface vii Data word A 16 bit integer that represents the value of the analog output channel The channel data word is valid only when the channel is enabled and there are no channel errors LSB least significant bit The bit that represents the smallest value within a string of bits The weight of this value is defined as the full scale range divided by the resolution Module ID code A unique number associated with each 1746 I O module The code defines for the processor the type of I O or specialty module residing in a specific slot in the 1746 chassis Module update time See channel update time Overall accuracy The worst case deviation of the signal over the full range expressed in percent of full scale Rack A hardware assembly that houses devices such as I O modules adapter modules processor modules and power supplies Repeatability The closeness of agreement among repeated measurements of the same variable under the same conditions Resolution The smallest detectable change in a measurement typically expressed in engineering units e g microseconds or as a number of bits For example a 16 bit system has 65536 possible output states It can therefore measure 1 part in 65536
30. i T T T 1 ji T T T Channel 1 i a Sc Output Data e Parameter 2 T T 1 i T T T 1 i T T T 1 i T T T Channel 6 T TT Tt T T Channel 7 Important The values in output word pairs 16 through 31 apply to each individual channel If you want to use any of these features you must set each channel s output word pair Changing the output data format or range Bits 1 6 of the channel configuration word will clear or disable user scaling clamping limit alarms ramping rate limiting and preset fault values Similarly if format or range is changed you must reconfigure the values for each of these features User Defined Scale For special applications the 1746sc NO8i and 1746sc NO8v output modules let you define a custom data format This user defined scale is very similar to the proportional counts data format except that instead of converting the output data to an output signal using a previously defined scale 32 768 to 32 767 your module converts the output data using a scale defined by the values in output words 16 low limit of scale and 24 high limit of scale for channel 0 The high limit value must be greater than the low limit value for proper operation Also the difference between the low and high values should be greater than 1024 counts If the difference between the low and high values is less than 1024 counts unexpected results can occur especially at the extreme ends of the range 24 SL
31. idelines 1747 6 2 Installation amp Operation Manual for Modular Hardware Style Programmable Controllers 1747 NI001 Installation amp Operation Manual for Fixed Hardware Style Programmable Controllers 1747 6 15 Allen Bradley SLC 500 Instruction Set Reference Manual ABT 1747 TSG001 SLC 500 Software Programmers s Quick Reference Guide 1747 NP002 Allen Bradley HHT Hand Held Terminal User Manual 1747 NM009 Getting Started Guide for HHT Hand Held Terminal SD499 Allen Bradley Publication Index AG 7 1 Allen Bradley Industrial Automation Glossary To obtain a copy of any of the Allen Bradley documents listed contact your local Allen Bradley office or distributor You should understand the following terms and abbreviations before using this guide For the definitions of terms not listed here refer to Allen Bradley Industrial Automation Glossary Publication AG 7 1 Channel Refers to one of the sets of signal interfaces available on a module s terminal block Channel update time For analog outputs the time required for the channel to convert the data received from the processor to analog output signals at the terminals Chassis See rack Configuration word Contains the channel configuration information needed by the module to configure and operate each channel Information is written to the configuration word through the logic supplied in your ladder program D A Refers to digital to analog conversion T
32. l 0 with a 10 V operating range and you want to use the Engineering Units data format For this application you would use the following bit settings forthe channel configuration bytes Channel 0 Configuration Word 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 Suppose also that you would like to set the output limits to 2 V and 8 V You would enter the following for channel 0 data parameters 1 and 2 O e 16 Value 2000 decimal 2V O e 24 Value 8000 decimal 8V Now by setting bit 8 and 10 in the Channel 0 configuration word the output will be clamped to 2 to 8 volts 15 Channel 0 Configuration Word 0 0 0 0 0 0 1 0 1 0101 1011 0 01011 Monitor bit 1 of the channel input status word 2 I e 8 When the bit is 1 clamping values set then se the channel 0 configuration back to its original value 15 Channel 0 Configuration Word 0 0 0 0 0 0 0 0 0 010 1011 0 0 0 1 26 SLC 500 Analog Output Modules Address O e 14 10v 8v Your Channel 0 data output will now look like this 10 000 2000 8000 10 000 15 Note that whenever the requested output data values meet or attempt to exceed the output data limits your module sets bits 9 or 10 in the channel input status 2 word I e 8 for Ch 0 to indica
33. llation amp Operation Manual for more information Getting Technical Assistance Declaration of Conformity If you need technical assistance please review the information in Chapter 5 Testing Your Module before calling your local distributor of Spectrum Controls Note that your module contains electronic components which are susceptible to damage from electrostatic discharge ESD An electrostatic charge can accumulate on the surface of ordinary plastic wrapping or cushioning material In the unlikely event that the module should need to be returned to Spectrum Controls please ensure that the unit is enclosed in approved ESD packaging such as static shielding metallized bag or black conductive container Spectrum Controls reserves the right to void the warranty on any unit that is improperly packaged for shipment For further information or assistance please contact your local distributor or call the Spectrum Controls technical Support at USA 440 646 6900 United Kingdom 01908 635230 Australia 800 809 929 or 61 398 990 335 Brazil 55 11 3618 8800 Europe 49 2104 960 333 Declaration of Conformity Application of Council Directive s 73 23 EEC Low Voltage Directive 89 336 EEC Electromagnetic Compatibility Standard s to which Conformity EN50081 2 1993 EN50082 2 1995 is Declared EN61010 1 1993 EN61131 2 1995 Manfacturer s Name Spectrum Controls Inc Manfacturer s Address 2700 Richards Road South
34. lution for applications requiring up to eight outputs so you don t have to buy more I O than you need Your ladder logic is simplified as the module provides channel ramping limit alarms output clamping and various data scaling options SLC 500 Analog Output Modules Detailed Specifications State of the Art Performance These modules incorporate proprietary Allen Bradley technology so they operate and perform like the latest Allen Bradley products They also provide 16 bits ofresolution user programmable range settings requires no field calibration software configuration programmable output limits and programmable safe states in case of a fault Table 2 Electrical specifications module Backplane Current Consumption maximum 1746sc NO8i 1746sc NO8v Optional External 24V supply Backplane Power Consumption typical Number Of Channels TO Chassis Location A D Conversion Method Calibration Opto Electrical Isolation Module ID Code 1746sc NO8i 1746sc NO8v Thermal Dissipation 120mA 5 Vde 250mA 24 Vdc 120 mA 5 Vde 160 mA 24 Vdc 24V 10 5 6W 8 single ended Any 1746 I O module slot except slot 0 Sigma Delta Factory calibrated 500 Vdc field wiring to backplane 3527 Class 12727 Class 3 3528 Class 12728 Class 3 6 6W Chapter 1 Overview And Specifications Table 3 Electrical specifications outputs Output Current Ranges NO8i selectable for each channel Outpu
35. m set 1 corrected Controls Check Channel Bit 15 Status Word gt n gt Channel sonig Emol Check channel config Contact you local distributor or Spectrum Controls Preventive Maintenance Safety Considerations Chapter 6 Maintaining Your Module And Ensuring Safety Read this chapter to familiarize yourself with e preventive maintenance e safety considerations The National Fire Protection Association NFPA recommends maintenance procedures for electrical equipment Refer to article 70B of the NFPA for general safety related work practices The printed circuit boards of your module must be protected from dirt oil moisture and other airborne contaminants To protect these boards install the SLC 500 system in an enclosure suitable for its operating environment Keep the interior of the enclosure clean and whenever possible keep the enclosure door closed Also regularly inspect the terminal connections for tightness Loose connections may cause a malfunctioning of the SLC system or damage to the components WARNING POSSIBLE LOOSE CONNECTIONS Before inspecting connections always ensure that incoming power is OFF Failure to observe this precaution can cause personal injury and equipment damage Safety is always the most important consideration Actively think about the safety of yourself and others as well a
36. n Bradley RSLogix 500 Before using your module you must configure the slot your module is in by entering your module s ID code in RSLogix When using RSLogix simply select your module from the list of modules on the system I O configuration display to automatically enter the ID code With earlier versions of RSLogix you must manually enter the ID code To enter your module s ID code select other from the list of modules on the system I O configuration display and enter your module s ID code at the prompt The module ID code for your module is Table 8 Output module ID code Catalog Number Module ID Code 1746sc NO8i 3527 Class 1 Mode 8 inputs 8 outputs 12727 Class 3 Mode 16 inputs 32 outputs 1746sc NO8v 3528 Class 1 Mode 8 inputs 8 outputs 12728 Class 3 Mode 16 inputs 32 outputs SLC 500 Analog Output Modules Output Image If you perform the READ IO CONFIG option in your RSLogix programming software the module is configured to the respective Class 1 mode if the power is cycled at the PLC if the module has not been previously configured Note If your module was previously configured for Class 3 operation and you perform READ IO CONFIG and your RSLogix software does not have the NO8 in it s I O pick list then your module will be set to operate in Class 3 mode The input and output words will be set to zero This will likely cause your SLC program to indicate errors upon downloading
37. ntain information that may help you as you install and wire your module e National Electrical Code published by the National Fire Protection Association of Boston MA IEEE Standard 518 1977 Guide for the Installation of Electrical Equipment to Minimize Electrical Noise Inputs to Controllers from External Sources e IEEE Standard 142 1982 Recommended Practices for Grounding of Industrial and Commercial Power Systems e Noise Reduction Techniques in Electronic Systems by Henry W Ott published by Wiley Interscience of New York in 1976 Avoiding Electrostatic Damage Guard against electrostatic damage by observing the following precautions CAUTION ELECTROSTATICALLY SENSITIVE COMPONENTS e Before handling the module touch a grounded objectto rid yourself of electrostatic charge e When handling the module wear an approved wrist strap grounding device e Handle the module from the front away from the backplane connector Do nottouch backplane connector pins e Keep the module in its static shield containerwhen not in use or during shipment Failure to observe these precautions can degrade the module s performance or cause permanent damage Determining Power Requirements The backplane of the SLC 500 system can provide both 5 Vdc and 24 Vdc power The following table shows the maximum current consumed by your module when using these power sources Setting The Jumper J4 Chapter 2 Installing And Wiring Your Mo
38. o longer in an open loop condition or commanding less than 0 1ma and if the Latch Alarms feature is enabled the Reset Latched Alarms bit has been set or toggled Module SLC Resetting Status Bit 14 This bit is set to one whenever the module or SLC is resetting The bit will clear when both the module and the SLC are not resetting This bit is not latched by the Latch Alarm feature Do not send configuration data to the module when this bit is set Fatal Channel Error Status Bit 15 This bit is set to one whenever your module detects a non recoverable channel error such as a software power up failure due to corrupt hardware or malfunctioning software You may be able to recover from this type of error by resetting the SLC 500 processor or cycling power to your module This bit is not latched by the Latch Alarm feature 34 SLC 500 Analog Output Modules Chanel Input Status Word 2 Class 3 Only l e 9 Leid l e 15 Words 8 through 15 of the input image file addresses I e 8 through I e 15 reflect additional configuration and status of each channel These are only available in Class 3 mode Use the data provided in these status words to determine the status ofthe configuration and various channel alarm conditions Input Status 2 e a T Channel 0 Status2 TTT T T T 1 T T T T 1 T T T T 1 T T T T Channel 1 Status 2 i Class 3 Only Channel 6 Status 2 Channel 7 Status 2 Tabl
39. ponding feature Setting these values also enables most features e User Scaling Values e Clamping Values e Limit Alarm Values e Ramping Rate Limiting Value e Preset Fault Value Note Once the data parameters have proper values and bits 9 11 are set then set bit 8 set optional feature to set the feature or set bit 7 clear optional feature to clear the feature Output Data Parameter Words 1 and 2 of the output image file addresses O e 16 through O e 31 let you define either Output Data Parameter Word 1 O e 16 O e 23 Set User Scaling Values User Scale Low Value Set Clamping Values User Clamping Low Value Set Limit Alarm Values Limit Alarm Low Value Set Ramping Rate Limiting Values Ramping Rate 0 3276 7 millivolts milliamps second Set Preset fault value and Output Data Parameter Word 2 O e 24 O e 31 Set User Scaling Values User Scale High Value Set Clamping Values User Clamping High Value 0 e 16 0 e 17 0 e 22 0 e 23 0 e 24 0 e 25 0 e 30 0 e 31 Chapter 4 Using Your Output Module 23 Set Limit Alarm Values Limit Alarm High Value Optional Features Class 3 Only T T 1 T T T T 1 i T T T 1 T T T T Channel 0 T T I T T T T T T T 1 T T T T Channel 1 i i Output Data e Parameter 1 1 T 1 T T T T 1 T T T T 1 T T T T Channel 6 T TOT Tt T T Channel 7 T T 1 ji T T T 1 T T T T 1 T T T T Channel 0 T T 1 i T T T 1
40. red to the module Failure to observe this precaution can cause unintended equipment operation and damage When inserting your module into the rack you do not need to remove the supplied 18 position terminal block from the module If however you do remove the terminal block and use the write on label to identify your module s location To remove the terminal block unscrew the two retaining screws at the top and bottom of the terminal block and using a screwdriver or needle nose pliers carefully pry the terminal block loose Chapter 2 Installing And Wiring Your Module 9 To insert your module into the rack follow these steps 1 Align the circuit board of your module with the card guides at the top and bottom of the chassis Ww e WS EN NOD Top and Bottom SS Module Release s Card 5 Guide 2 Slide your module into the chassis until both top and bottom retaining clips are secure Apply firm even pressure on your module to attach it to its backplane connector Never force your module into the slot Cover all unused slots with the Card Slot Filler Allen Bradley part number 1746 N2 To remove your module press the retaining clips at the top and bottom of your module and slide it out 10 SLC 500 Analog Output Modules Wiring Your Module To wire the terminal block you need a philips or flat blade screwdriver Belden 8761 shielded twisted pair cable or equivalent Each
41. s been set Ifthe channel is enabled then ramping rate limiting is active Preset Fault Value Set Status Bit 4 This bit indicates that a user defined fault value is set for this channel See Set Output behavior Under Fault Condition in the previous section for fault conditions Reset Output On Fault Status Bit 5 This bit indicates that the output for this channel will be reset if a channel fault occurs See Set Output behavior Under Fault Condition in the previous section for fault conditions Hold Output On Fault Status Bit 6 This bit indicates that the channel output value will be held to the current value when a channel fault occurs See Set Output behavior Under Fault Condition in the previous section for fault conditions Preset Output On Fault Status Bit 7 This bit indicates that the channel output will go to the user defined preset when a channel fault occurs See Set Output behavior Under Fault Condition in the previous section for fault conditions Alarms Will Be Latched Status Bit 8 This bit indicates that the channel alarms will latch if an error occurs When this bit is set and an alarm condition occurs The Alarm Status bit will stay set until you reset the bit using the Reset Latched Alarms bit Output At Low Clamp Alarm Status Bit 9 This bit indicates that the channel output data value is being commanded to go below the user defined low clamp value 0000 36 SLC 500
42. s the condition of your equipment The following are some things to consider Indicator Lights When the module status LED on your module is illuminated your module is receiving power Activating Devices When Troubleshooting Never reach into a machine to activate a device the machine may move unexpectedly Use a wooden stick 42 SLC 500 Isolated Analog Output Modules Standing Clear Of Machinery When troubleshooting a problem with any SLC 500 system have all personnel remain clear of machinery The problem may be intermittent and the machine may move unexpectedly Have someone ready to operate an emergency stop switch CAUTION POSSIBLE EQUIPMENT OPERATION Never reach into a machine to actuate a switch Also remove all electrical power at the main power disconnect switches before checking electrical connections or inputs outputs causing machine motion Failure to observe these precautions can cause personal injury or equipment damage Safety Circuits Circuits installed on machinery for safety reasons like over travel limit switches stop push buttons and interlocks should always be hard wired to the master control relay These circuits should also be wired in series so that when any one circuit opens the master control relay is de energized thereby removing power Never modify these circuits to defeat their function Serious injury or equipment damage may result Refer to your system s Insta
43. t Voltage Ranges NO8v only selectable for each channel SLC Communication Formats selectable for each channel Output Impedance Current Outputs NO8i Voltage Outputs NO8v Load Range Current Outputs NO8i Voltage Outputs NO8v Max Current Voltage Mode NO8v Output Step Response Time Channel Update Time typical Class 4t020mA 0t020mA 0to21 mA 0to21 5 mA 10 to 10 Vdc 10 25 to 10 25 Vdc Oto 10 Vde Oto 5 Vde 1 to 5 Vdc Scaled engineering units Scaled for PID Proportional counts 1746 NO4 format User defined scale Greater than 1 Mohm Less than 1 0 ohm 0 to 500 ohm 1Kohm and greater 10mA 1 ms 0 95 of full scale Sms to update all 8 channels Class 3 10ms to update all 8 channels Output Resolution 16 bit Current Outputs NO8i 366 nA count Voltage Outputs NO8v 320 uV count Overall Accuracy Current Outputs NO8i 0 1 of full scale 25 C 0 2 of full scale 60 C Voltage Outputs NO8v 0 1 of full scale 25 C 0 2 of full scale 60 C Table 4 Physical specifications LED Indicators Eight green channel status indicators one for each channel One green module status indicator Recommended Cable Belden 8761 shielded twisted pair or equivalent Wire Size maximum Two 14 24 AWG wire perterminal Terminal Block Removable supplied SLC 500 Analog Output Modules Table 5 Environmental specifications Operating Temperature Oto 60 C 32 to 140 F Storage
44. te a clamp alarm Set Limit Alarm Values This feature allows alarming if the value output from the card is the same or higher than the limit alarm high value or the same or lower than the limit alarm low value It can be set on a channel by channel basis The limit alarm low and high values are configured by placing the desired value into the Output Data Parameter Word 1 and 2 respectively for the desired channel then setting the Output Configuration Word for the channel to Set the Limit Alarm Values The limit alarm values are based on the same data format and output range configured for the channel Note For some ranges and formats the limit alarms will occur a few counts off from the set limit alarm values You may need to adjust the limit alarm values until the desired alarm limit occurs For Example Suppose you have a valve connected to channel 6 with a 0 20ma operating range and you want to use the NO4 compatible format You would use the following settings for the channel 6 configuration word Channel 6 Configuration Word 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 Suppose also that you would like to provide an alarm ifthe output data word was commanded to less than 100 counts and greater than 30 000 counts You would enter the following for channel 6 data parameter 1 and 2 Chapter 4 Using Your Output Module 27 O e 22 Value 100 decimal O e 30 Value 3000
45. terminal may hold up to two 14 gauge leads CAUTION POSSIBLE EQUIPMENT OPERATION Before wiring your module always disconnect powerfrom the SLC 500 system and from any other source to the module Failure to observe this precaution can cause unintended equipment operation and damage Before wiring the terminal block take some time to plan your system Ensure that the SLC 500 system is installed in a NEMA rated enclosure and that the SLC 500 system is properly grounded Ensure that the load resistance for a current output channel is less than 500 ohms Ensure that the load resistance for a voltage output channel is greater than 1 kohms Route the field wiring away from any other wiring and as far as possible from sources of electrical noise such as motors transformers contactors and ac devices As a general rule allow at lease 6 in about 15 2 cm of separation for every 120 V of power Routing the field wiring in grounded a conduit can reduce electrical noise further If the field wiring must cross ac or power cables ensure that they cross at right angles To wire your module follow these steps 1 Determine the length of cable you need to connect a channel to its field device Remember to include additional cable to route the shield wire and foil shield to their ground points 2 At each end of the cable strip some casing to expose the individual wires 3 Trim the exposed signal wires to 2 in lengths
46. tors e interpreting I O error codes e troubleshooting Before testing your module test your SLC 500 system using the procedures described in your Allen Bradley system Installation amp Operation Manual Important If your module appears to be functioning but the terminals aren t providing an output signal the 24 Vdc power source backplane or external may not be providing enough current 250 mA NO8i 160 mA NO8v You can prevent many potential problems by simply inspecting your analog module 1 Ensure that the external 24 Vdc jumper J4 is set properly e With the jumper in the RACK position the module draws all its power from the backplane of the SLC system e With the jumper in the EXT position the module draws its 24 Vdc power from an external power source however the module still draws its 5 Vdc power from the backplane 2 Ensure that all wire connections are correct and secure and that no wires are missing or broken Refer to Chapter 2 Installing And Wiring Your Module for more information 3 Ensure that the shield for the cable used to wire your module is properly grounded 4 Ensure that the removable terminal block on your module is secure 38 SLC 500 Analog Output Modules Disconnecting Prime Movers Powering Up Before testing your module ensure that machine motion will not occur e Disconnect motor wires at the motor starter or the motor itself This lets you test the operation of the
47. upply must be turned on for the module to operate If the external 24V supply is turned off the module s outputs will be turned off and the module s processor will be reset until power is restored The module s LEDs will blink the 24v failure blink code See the error blink code descriptions in the troubleshooting section of this manual SLC 500 Analog Output Modules Selecting A Rack Slot Inserting Your Module Into The Rack Three factors determine where you should install your module in the rack ambient temperature electrical noise and Class1 3 operation When selecting a slot for your module try to position your module e ina rack close to the bottom of the enclosure where the air is cooler e away from modules that generate significant heat such as 32 point input output modules e ina slot away from ac or high voltage de modules hard contact switches relays and ac motor drives e to use the advanced features of Class 3 operation the module must be located in the local rack A 5 02 or above CPU must be used e away from the rack power supply if using a modular system Remember that in a modular system the processor always occupies the first slot of the rack CAUTION POSSIBLE EQUIPMENT OPERATION Before installing orremoving your module aways disconnect powerfromthe SLC 500 system and from any other source to the module in other words don t hot swap your module and disconnect any devices wi
48. will vary depending on mode of operation and features implemented Table 7 Channel update time all channels Mode Update Time Class 1 5 ms Class 3 10 ms By writing to the status file in the modular SLC processor you can disable any chassis slot Refer to your SLC programming manual for the slot disable enable procedure CAUTION POSSIBLE EQUIPMENT OPERATION Always understand the implications of disabling a module before usingthe slotdisable feature Failure to observe this precaution can cause unintended equipment operation When you disable an output modules slot the module holds its outputs in their last state in Class 1 mode When you re enable the output modules slot the data that is in the processor image table is converted to an analog output signal during the next scan Slot disabling only affects enabled channels In Class 3 mode the output will go to its fault state as configured by the user when the slot is disabled See the Set Output Behavior Under Fault Condition section in the next chapter Entering Your Module es ID Code Chapter 4 Channel Configuration Data and Status Read this chapter to e enter your output module s ID code e configure each output channel e set the optional features e control each output channel s signal e monitor each output channel e check each output channel s configuration and status To use your module you need e programming equipment e Alle
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