E 2007 Rockwell Automation, Inc. All rights reserved.2007 Rockwell Automation, Inc. All rights reserved.
Rev. February 2007 Rev. February 2007
IOCe56r
Exercise: Configuring Local Exercise: Configuring Local 1756-I/O Modules
1756-I/O Modules
In this exercise, you will demonstrate your understandin g of local 1756-I/O modules.
Directions:
For help performing steps in this exercise, see the associated job aid(s).
1.
1. What are the differe nces between local and remote I/O?
2.
2. Why are devices w ired to an RTB rather than directly to the I/O module?
3.
3. Examine the digital input modu le in your workstation. What status indications are given by the module?
4.
4. Which I/O compone nt connects the module to the rest of the chassis?
5.
5. Which configura tion feature prevent s a connection from the controller to the wrong module?
Exercise A
Exercise A
5--14
5--14 Exercise: Configuring Local 1756-I/O Modules
E 2007 Rockwell Automation, Inc. All rights reserved.2007 Rockwell Automation, Inc. All rights reserved. Rev. Rev. February February 20072007 IOCe56r 6.
6. Describe the conversions that an analog I/O module perfor ms:
7.
7. How does the asynchron ous relationship between I/O module updates and code execution affect output?
8.
8. Explain the Compatib le Module electro nic keying option:
9.
9. Choose the I/O module charac teristics (input vs. output and digital vs. analog) that correspond to each of the following devices:
D
Deevviicce e IInnppuut t OOuuttppuut t DDiiggiittaal l AAnnaalloogg LED
LED Thermometer Thermometer Motor Motor Contactor Contactor Pressure Pressure Gauge Gauge Pushbutton Pushbutton Start/Stop Start/Stop switch switch Light Sensor Light Sensor
Turn to the Answers section.
How Did You Do?
How Did You Do?
5--15 5--15 Exercise: Configuring Local 1756-I/O Modules
E 2007 Rockwell Automation, Inc. All rights reserved.2007 Rockwell Automation, Inc. All rights reserved.
Rev. February 2007 Rev. February 2007
IOCe56r
In this exercise, you will practice configuring local 1756-I/O modules.
Directions:
For help performing steps in this exercise, see the associated job aid(s).
1.
1. Open the IOC_1756r_B1.acd IOC_1756r_B1.acd project file.
2.
2. Add the following loca l 1756-I/O modules in your wor kstation to the I/O configuration of the Controller Organize r:
Module
•Ensure that the Comm. Format option is set to Ensure that the Comm. Format option is set to FullFull Diagnostics
Diagnostics-Output -Output Data.Data.
•Ensure that the Electronic Keying is Ensure that the Electronic Keying is set to set to Compatible KeyinCompatible Keying.g.
•Make sure that diagnostics (including latching) are enabled forMake sure that diagnostics (including latching) are enabled for points 0-5 only.
points 0-5 only.
•Keep other options at their Keep other options at their default settings.default settings.
Digital Input Digital Input Module
Module 2 2 ChaChangnge e ononly ly the the momodudule le naname me and and sloslot t nunumbmber er sesettittingngs.s.
Make sure that the configured slot numbers match the actual module slot numbers.
3.
3. Download the project to the controller in slot 1 and go online.
4.
4. Place check mark s in the available boxes after verifying the following conditions:
- The OK light on the output module (slot 0) is steady green.
- The OK light on the input module (slot 2) is steady green.
- The I/O light on the controller is steady green.
- The I/O OK light on the online toolbar is steady green.
- A warning icon (yellow triangle) does not appear on the I/O configuration folder or the modules in slot 0 and 2 in the Controller Organizer.
5.
5. If applicable, correct any faul ted modules.
If there are FLT (fault) LEDs illuminated on the face of the output module, verify that the diagnostic selections on the Configuration tab for the output module are cleared.
6.
6. When all modules are configure d and running correctly , go offline and close the project.
Exercise B Exercise B
"
Tip
Tip
5--16
5--16 Exercise: Configuring Local 1756-I/O Modules
E 2007 Rockwell Automation, Inc. All rights reserved.2007 Rockwell Automation, Inc. All rights reserved. Rev. Rev. February February 20072007 IOCe56r 7.
7. Identify the I/O tags fo r the following descr iptions:
A.
A. An input device wired to point two on a module in slot four:
B.
B. An output device w ired to point six on a module in sl ot one:
C.
C. An output device wired to point one on a module in slot six:
Turn to the Answers section.
How Did You Do?
How Did You Do?
5--17 5--17 Exercise: Configuring Local 1756-I/O Modules
E 2007 Rockwell Automation, Inc. All rights reserved.2007 Rockwell Automation, Inc. All rights reserved.
Rev. February 2007 Rev. February 2007
IOCe56r
5--18
5--18 Exercise: Configuring Local 1756-I/O Modules
E 2007 Rockwell Automation, Inc. All rights reserved.2007 Rockwell Automation, Inc. All rights reserved. Rev. Rev. February February 20072007 IOCe56r
Exercise A Exercise A
1.
1. The following answers are possible correct responses:
• Local I/O module s are located in the same cha ssis as the controller. Remote I/O modules are located in a separate chassis.
• Communications between local I/O modules a nd the controller is faster than between remote I/O modules and the controller.
• Local I/O module s communicate with the controlle r across the ControlBust backplane. Remote I/O modules communicate with the controller over a control network (i.e., ControlNett)
2.
2. When devices are wired to an RTB ra ther than directl y to an I/O module, alterations to the wiring scheme can be made without removing the entire module. Keying slots prevent the wrong RTB from being inserted in the wrong module. Also, the RTB allows for easier faster module replacem ent in that rewiring is unnecessary.
3.
3. The OK light on the input mod ule (slot 2) shoul d be steady green.
4.
4. The ControlBus co nnector connects the I/O module to the rest of the chassis, allowing for communications with the local controller.
5.
5. Electronic keying compares ke ying informatio n in the controller to keying information in the I/O module. This ensures that data is being sent and received to and from the correct module.
6.
6. Analog modules convert analog signa ls to digital values for inputs and convert digital values to analog signals for outputs.
These conversion s are performed because the controller can only deal with digital values.
7.
7. The asynchronous relationship between code execution and I/O module updates means that output data is not being sent to the process/machine as code is executing. The real output may not match up with output displayed by the code execution.
8.
8. The Compatible Mod ule electronic keying option allows all I/O module information except minor revision to match.
Answers
Answers
5--19 5--19 Exercise: Configuring Local 1756-I/O Modules
E 2007 Rockwell Automation, Inc. All rights reserved.2007 Rockwell Automation, Inc. All rights reserved.
Rev. February 2007 Rev. February 2007
IOCe56r 9.
9. The table should be comple ted as shown below :
D
Deevviicce e IInnppuut t OOuuttppuut t DiigDgiittaal l AAnnaalloogg LED
LED √ √
Thermometer
Thermometer √ √
Motor Motor Contactor
Contactor √ √
Pressure Pressure Gauge
Gauge √ √
Pushbutton
Pushbutton √ √
Start/Stop Start/Stop switch
switch √ √
Light Sensor
Light Sensor √ √
Exercise B Exercise B
2.
2. The following dialo g boxes should match your config ured I/O module for slot 0:
5--20
5--20 Exercise: Configuring Local 1756-I/O Modules
E 2007 Rockwell Automation, Inc. All rights reserved.2007 Rockwell Automation, Inc. All rights reserved. Rev. Rev. February February 20072007 IOCe56r
The following dialog boxes should match your configured I/O module for slot 2:
5--21 5--21 Exercise: Configuring Local 1756-I/O Modules
E 2007 Rockwell Automation, Inc. All rights reserved.2007 Rockwell Automation, Inc. All rights reserved.
Rev. February 2007 Rev. February 2007
IOCe56r 7.
7. The correct tags for the descripti ons are listed:
A.
A. An input device wired to point two on a module in slot four:
Local:4:I.Data.2 Local:4:I.Data.2
B.
B. An output device w ired to point six on a module in s lot one:
Local:1:O.Data.6 Local:1:O.Data.6
C.
C. An output device wired to point one on a module in slot six:
Local:6:O.Data.1 Local:6:O.Data.1
5--22
5--22 Exercise: Configuring Local 1756-I/O Modules
E 2007 Rockwell Automation, Inc. All rights reserved.2007 Rockwell Automation, Inc. All rights reserved. Rev. Rev. February February 20072007 IOCe56r
Lesson Lesson 6 6
E 2007 Rockwell Automation, Inc. All rights reserved.2007 Rockwell Automation, Inc. All rights reserved.
Rev. February 2007
After completing this lesson, you should be able to create tags and monitor data in an RSLogix 5000 project by performing the following tasks:
• Create tags in the Edit Tags list
• Define an alias tag
• Monitor and edit data in a Logix5000 t controller
Why These Skills Are Important Why These Skills Are Important
These skills are important for the following reasons:
• Being able to cre ate tags and monitor data in RSLogi x 5000 software is critical to developing a project that efficiently stores values in memory.
• Having a properly organized proje ct and project tags will help reduce downtime during maintenance and troubleshooting activities.
Tags Tags Memory:
Memory: A group of circuit elements in a controller where programs and data are stored.
The following are common memory sizes:
• Bit: Bit: The smallest unit of data represented by the digits 0 and 1
• Byte: Byte: A string of 8 bits operated on as one unit.
• Word: Word: A unit of memory in a controller composed of 16 individual bits (or two bytes) that are treated as one unit.
Tag:
Tag: An area of controller memory where data from devices, calculations, faults, etc. is stored. Each area is given a unique name:
Controller
Optional: A lesson on A lesson on Identifying Numbering Systems and Converting Numeric Values is available. This lesson is available. This lesson
is not a requirement for the course.
is not a requirement for the course.
What You Will Learn What You Will Learn
Mention that factors such as the order in Mention that factors such as the order in which data is entered can have an effect which data is entered can have an effect on the overall project file size.
on the overall project file size.