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Testing Your Module

Read this chapter to prevent potential problems in a systematic and
controlled way. This chapter covers:

• inspecting your module

• disconnecting prime movers

• powering up

• interpreting the LED indicators

• interpreting I/O error codes

• troubleshooting

Before testing your module, test your SLC 500 system using the
procedures described in your system’s Installation & Operation Manual.

Inspecting Your  Module

You can prevent many potential problems by simply inspecting your
analog module:

1. Ensure that all wire connections are correct and secure and that no

wires are missing or broken.

CAUTION

FIELD WIRING ERRORS

Before enabling a channel (through your ladder program),
ensure that you have not connected a voltage source to a
channel configured for a current input (and vice versa).

Failure to observe this precaution can cause improper module
operation or equipment damage.

Chapter 

6

!

Содержание SLC 500 1746sc-INI4i

Страница 1: ...Owner s Guide 0300127 04 Rev F SLC 500 ISOLATED ANALOG INPUT MODULES Catalog Numbers 1746sc INI4i 1746sc INI4vi...

Страница 2: ......

Страница 3: ...bility is assumed by Spectrum Controls with respect to the use of any of the information products circuits programming or services referenced herein The information in this owner s guide is subject to...

Страница 4: ......

Страница 5: ...The Difference Between Channel Update Time Step Response Time 21 Selecting An Input Filter Frequency 22 Auto Calibration Time 25 Channel Enable And Disable Times 25 Your Module s Response To Slot Disa...

Страница 6: ...alue 34 Figure 11 PID control example 39 Figure 12 Programming for PID control example 40 Figure 13 Data table for PID control example 40 Figure 14 User defined scaling example 41 Figure 15 Programmin...

Страница 7: ...nderstand 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 repres...

Страница 8: ...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 Al...

Страница 9: ...formation is written to the configuration word through the logic supplied in your ladder program Cut off frequency The frequency at which the input signal is attenuated 3 dB by the digital filter Freq...

Страница 10: ...t between the equipment grounding conductor or signal reference structure and the signal conductors Overall accuracy The worst case deviation of the signal over the full range expressed in percent of...

Страница 11: ...ctive resolution They also provide 750 Vdc field wiring to backplane isolation to protect your processor and other rack components And for state of the art precision they offer 16 bits of resolution F...

Страница 12: ...ble 2 Electrical specifications module Backplane Current Consumption typical 1746sc INI4i 440 mA 5 Vdc 0 mA 24 Vdc 1746sc INI4vi 550 mA 5 Vdc 0 mA 24 Vdc Backplane Power Consumption typical 2 75 W Num...

Страница 13: ...inuous Input Filter 3 dB Cut Off Frequencies 13 1 Hz for 50 Hz filter selectable for each channel 15 7 Hz for 60 Hz filter 65 5 Hz for 250 Hz filter 131 Hz for 500 Hz filter Input Step Response Time 8...

Страница 14: ...d Cable Belden 8761 shielded twisted pair or equivalent Wire Size maximum One 12 24 AWG wire per terminal Terminal Block Removable supplied Table 5 Environmental specifications Operating Temperature 0...

Страница 15: ...ically using the procedures provided in Appendix A The following documents contain information that may help you as you install and wire your module NFPA 79 Electrical Standard for Industrial Machiner...

Страница 16: ...when 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 syst...

Страница 17: ...TION Before installing or removing your module always disconnect power from the SLC 500 system and from any other source to the module in other words don t hot swap your module and disconnect any devi...

Страница 18: ...dule 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 instal...

Страница 19: ...shrink wrap Insulation Clear Wire Black Wire 6 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 f...

Страница 20: ...D 2 SHIELD 3 V IN 3 I IN 3 COM 3 analog current source analog voltage source Shielded twisted pair cable with shield connected to ground only at one end To guard against electrostatic damage and impro...

Страница 21: ...NI4vi only 6 I IN 1 High differential current input 7 COM 1 Low differential input voltage current analog ground 8 V IN 2 High differential voltage input INI4vi only 2 9 I IN 2 High differential curre...

Страница 22: ...ule channel In Common Power Supply 3 Wire Transmitter Transmitter Supply Signal GND Transmitter Supply Signal Figure 3 Wiring schematic for single ended analog inputs Important With single ended input...

Страница 23: ...to calibration time channel enable and disable times your module s response to slot disabling How The Processor Communicates With Your Module Your processor transfers data to and receives data from th...

Страница 24: ...tus Word Input Image 8 Words Class 1 Output Scan Input Scan Example If you want to reconfigure channel 2 on your input module and it is in slot 4 of the SLC chassis you would modify the configuration...

Страница 25: ...ssor The full scale step response time is the time required for a channel s data word to reach 95 of the expected final value given a full scale step change in the input signal This means that if an i...

Страница 26: ...couple into an analog input signal This digital filter is programmable letting you select one of four filter frequencies for each channel The digital filter provides the highest noise rejection at the...

Страница 27: ...7 2 9 2 9 2 3 19 7 16 6 13 5 13 5 4 19 7 18 0 18 0 18 0 The 3 dB cut off frequency is the frequency at which input signals are passed with 3 dB of attenuation Choose a filter frequency so that the fre...

Страница 28: ...ilter 0 20 40 60 80 100 120 140 160 180 200 0 60 120 180 240 300 360 Hz 3 dB 15 7 Hz Amplitude in dB Signal Frequency Figure 8 Signal attenuation with 250 Hz input filter 0 20 40 60 80 100 120 140 160...

Страница 29: ...on occurs every 10 seconds for each channel independently Table 10 Auto calibration time per channel based on filter frequency Filter Frequency 50 Hz 60 Hz 250 Hz 500 Hz Current Input 182 ms 152 ms 39...

Страница 30: ...able procedure CAUTION POSSIBLE EQUIPMENT OPERATION Always understand the implications of disabling a module before using the slot disable feature Failure to observe this precaution can cause unintend...

Страница 31: ...arted Guide for APS Entering Your Module s ID Code Before using your module you must configure the slot your module is in by entering your module s ID code in APS To enter your module s ID code select...

Страница 32: ...ddresses O e 0 through O e 3 configure channels 0 through 3 respectively 15 Channel 0 Configuration Word 0 O e 0 Address Channel 1 Configuration Word O e 1 Channel 2 Configuration Word O e 2 Channel 3...

Страница 33: ...0 20 mA input range 1 0 0 4 20 mA input range 1 0 1 Invalid 1 1 0 Invalid 1 1 1 Engineering units 0 0 0 Scaled for PID 0 0 1 Proportional counts 0 1 0 1746 NI4 compatible format 0 1 1 User defined sca...

Страница 34: ...atus word are also set to zero When you reset the channel enable bit to one the channel data word remains set to zero until your module updates the channel status word Input Range configuration bits 1...

Страница 35: ...768 32767 0 20 mA 0 0 mA 20 5 mA 32768 32767 4 20 mA 3 5 mA 20 5 mA 32768 32767 1746 NI4 10V 10 V 10 V 32768 32767 compatible 0 10 V 0V 10 V 0 32767 0 5 V 0V 5 V 0 16384 1 5 V 1 V 5 V 3277 16384 0 20...

Страница 36: ...nput signal values until it detects and flags the open circuit Input Filter Frequency configuration bits 9 and 10 Use this bit field to select one of four filters for a channel The filter selected aff...

Страница 37: ...er defined scale A or output words 6 and 7 for user defined scale B Low Value of User Defined Scale A 15 0 O e 4 Address High Value of User Defined Scale A O e 5 Low Value of User Defined Scale B O e...

Страница 38: ...Ulow low limit of user defined scale Uhigh high limit of user defined scale U Uhigh Ulow Example Suppose you have a sensor with a 4 20 mA range and you want to scale your data from 100 to 9999 counts...

Страница 39: ...ord I e 2 Channel 3 Data Word I e 3 Checking Each Input Channel s Configuration And Status Words 4 through 7 of the input image file addresses I e 4 through I e 7 reflect the configuration and status...

Страница 40: ...nput range 1 0 1 4 20 mA input range 0 0 0 Engineering units 0 0 1 Scaled for PID 0 1 0 Proportional counts 0 1 1 1746 NI4 format 1 0 0 User defined scale A 1 0 1 User defined scale B 0 0 Zero on open...

Страница 41: ...ects an under range condition for a configured channel An under range condition exists when the input value is very near or below the lower limit for that channel s data format see Table 14 Non Fatal...

Страница 42: ...38 SLC 500 Isolated Analog Input Modules...

Страница 43: ...work directly with the SLC 5 02 5 03 and 5 04 PID instruction without an intermediate scaling operation Use the input channel data as the process variable in the PID instruction Example Suppose your...

Страница 44: ...g 2 2 SCL SCALE Source N11 23 Rate 10000 Offset Dest Set the Rate and Offset parameters for your application The Destination is typically an analog output channel Refer to the APS User Manual or Analo...

Страница 45: ...efined scaling example 4 20 mA Pressure Sensor CPU 1746sc INI4i Analog Input Module slot 3 Simple display only Operator Interface Analog Input Signal channel 0 Specially scaled data e g 100 9999 Figur...

Страница 46: ...42 SLC 500 Isolated Analog Input Modules...

Страница 47: ...d in your system s Installation Operation Manual InspectingYour Module You can prevent many potential problems by simply inspecting your analog module 1 Ensure that all wire connections are correct an...

Страница 48: ...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 co...

Страница 49: ...fer to the following section Troubleshooting Off Either your module is powering up or the channel is disabled Off Off Either the power is off the module is powering up or a module fault occurred Cycle...

Страница 50: ...l config word bit 0 1 Retry End Fault condition Check channel status word bits 12 15 Fatal channel error such as a software power up failure due to corrupt hardware or malfunctioning software Try rese...

Страница 51: ...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 C...

Страница 52: ...cking 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...

Страница 53: ...ully configured It also calibrates a channel every 10 seconds if auto calibration is enabled see Chapter 4 For these reasons your module should never need calibration You may however want to verify th...

Страница 54: ...word values Address BinaryValue Decimal Equivalent O e 0 0000 0000 0010 0001 33 O e 1 0000 0000 0010 0001 33 O e 2 0000 0000 0010 0001 33 O e 3 0000 0000 0010 0001 33 e slot number 2 Let the operatin...

Страница 55: ...ff frequency 5 D Data files 19 Data formats 9 29 30 31 Data scaling 5 Data table 20 Data words 5 20 35 Diagnostic information 35 45 tests 7 Differential operation 5 6 16 DIP switches 20 Disable enable...

Страница 56: ...R Rack 6 choosing slot 13 inserting module 13 14 power requirements 12 Range error 37 Range full scale 6 Relative humidity 10 Removable terminal block 10 Repackaging iii 12 Repeatibility 6 Resolution...

Страница 57: ...shioning 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 metal...

Страница 58: ...c All rights reserved Printed in U S A Specifications subject to change without notice Publication 0300127 04 Rev F March2009 U S A Headquarters Spectrum Controls Inc P O Box 5533 Bellevue Washington...

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