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SACA C- 207 Study Guide UPDATED ACTUAL Questions and CORRECT
Answers
Communications ____ are software programs that connect the hardware of a PLC (I/O modules, processor, etc.) to a network and allows them to communicate with other devices. Drivers PLC Project files contain which of the following? ladder logic programs hardware configuration tags and communication configuration PLCs store the information status of input and output modules by assigning each terminal on the module a specific place in memory called a ____ _. Tag The part of a PLC that executes the logic program is the _____ _. Proccesor The power supply located in the chassis or backplane should only be used to power the PLC modules. True The six basic components of most PLC's are the power supply, the input modules, the output modules, chassis, processor, and the _______ _. Programming Device The two most popular communication protocols used with PLCs are Ethernet and ________________. Universal serial bus (USB) Typically, a USB driver will not automatically start when the programming device detects the connection and needs to be configured using specific software. False
USB, or ___________ commuication requires a cable connection from the programming device to the PLC controller module. Serial Which is proper sequence of operation within a PLC? Examine inputs, perform logic, update outputs Which of the following statements describes PLC Program mode? Allows the user to download, upload, edit and save project files. The processor does not scan or execute the ladder program, and outputs are not energized. Which of the following statements describes PLC Run mode? Allows the user to upload, save, edit, and monitor the operation of the PLC project. The processor executes the ladder program, monitors status of inputs, and energizes appropriate outputs. Based on the diagram below, which statement accurately describes when Y output will be energized? X1 = true, X2 = false, X3 = true In the I/O diagram below, what information does the absolute I/O address for any of the inputs or outputs tell you? The physical location of the terminal that the device is connected to In the module tag Local:1:I: Data, "I" refers to the modules _______ _. data type What are you doing if you are adding or deleting instructions, changing tags, addresses, descriptions, or logic functions while in a PLC Program? Editing the program Using the I/O diagram below, if Switch SW- 3 was on, which status indicator on the PLC input module in slot 1 would be on?
When voltage is applied to the terminal Local:1:I:Data.0 of an active high PLC input module, an XIO instruction with the same address will be ________ _. False When voltage is applied to the terminal Local:1:I:Data.1 of a PLC input module, an XIC instruction with the same address will be __________ _. True You created a new project file, gave it a name, set up the controller configuration, and set up the I/O configuration. What is the next step you should take if you want to enter the ladder logic routine? Open the program editor and add rungs PLC input/output diagrams are used to show the specific physical connections between the ____________ and the PLC I/O terminals. Real world devices Given the information below, which output will cause the motor to run in the Forward direction? Local:4:O.Data.
CTU_EXAMPLE.ACC = 1
COUNT SWITCH = FALSE
LAMP L2 will be ____ LAMP L1 will be ____.
OFF, OFF
A CTU instruction's DN bit is ____ whenever the accumulated (ACC) value is greater than or equal to the Preset (PRE) value and ______ when the value is less than the preset (PRE) value. true, false LAMP L2 will be on when PB1 is pressed and held ACCUM > 0 AND < 8000 the first rung is true PB1 is pressed and held for 5 seconds, then released. What is the value displayed in PRESET:
This program is an example of a time- driven sequence. Step 1: PB1 is pressed, Pump P1 energizes, Pump P2 energizes. What component in the program triggers the LAST step?
TIMERS[1].DN
This is a time-driven sequence, triggered by pressed PB1. Which statement accurately describes the sequence? PB1 pressed, Lube Pump Motor On, Impeller Motor on, 10 seconds goes by, Impeller Motor off, 5 more seconds Lube Pump Motor off. A PLC using a USB cable would have what type of connector?
TYPE B
Each group of digits in an IP address is called an octet. True HMI panels are configured using the HMI software in the configuration menu. True If a PLC is connected to a computer using a SINGLE CABLE, regardless of whether the network protocol is Ethernet or USB it is referred to as what type of network? point-to-point If a process requires a technician to edit and test a PLC and HMI communicating with each other via an Ethernet network, how many different IP addresses would need to be configured?
If a technician was using an HMI panel, to monitor or test a process, they would be interacting with _________ _. Objects If you want to set up Ethernet communication between a PLC and a PC, what two addresses MUST be configured correctly? IP address and MAC address
The HMI project is stored in the HMI memory. True When using an HMI panel connected to an Ethernet network, it must have a unique IP address. True Which of these statements accurately describes when identical IP addresses can be used on the same Ethernet network containing a PLC and PC. No IP addresses can be identical on the same Ethernet network If a PLC system does not have an Ethernet module, it can still communicate to a PC via what type of network?
USB
A PLC using an Ethernet network cable would have what type of connector?
RJ- 45
Math and Data Move instructions are output instructions that will only execute if the rung they occupy is true. True A comparison instruction is used in a PLC program as an input; therefore, it can make decisions and control processes just like XIC and XIO, but it looks at data values, not just a single bit of data. True A Compute (CPT) instruction can be used instead of any ADD, MUL, DIV or SUB instruction, but is not recommended. True An MCR circuit is used as a safety device to remove power from all PLC outputs. True EtherNet/IP uses the ______ (protocol) to produce a network suitable for use on automation and control level.
CIP
The six basic components of most PLCs are the power supply, the input and output modules, the processor module, the programming device, and the____ _. I/O chassis _________ uses several protocols to convert data from its native format, such as a text message, into a format that can be sent and tracked from the source node to the destination node of a network. Ethernet TCP/IP The three network levels are Enterprise, Automation and ______ and Field Device. Control A PLC requires much less _______ than a hardwired relay panel that could do the same job. Space PLCs provide a means of controlling machines and other industrial applications with an _______ instead of using hard wired devices, such as relay coils and contacts. Industrially-hardened computer
In applications where the PLC is not networked to other controllers or devices, the ________ is to upload and download PLC programs and to monitor the operation of a program running in the controller. USB connection ______ are software programs that allow a device to connect to a network and communicate with other devices. drivers What should be noted when the programmable controller processor displays a solid green RUN indicator? Processor is functioning properly - program is being executed _______ displays networks and devices in a similar manner to Windows Explorer.
RSWHO
A problem with identifying a controller's firmware revision by examining the hardware's ______ is that it is often inaccessible once installed. Product label ________ is a network search utility that shows the layout of every network that has a driver configured in RSLinx. Who Active All PLCs must have a(n) ______ to operate. User developed project What does the absolute I/0 address identify on a PLC input module? Actual physical location _______ is an embedded operating system that controls how microprocessor- controlled hardware devices operate. Firmware In this type of PLC input module, an input is on if voltage is applied to the input terminal and off if no voltage is applied to the input terminal. Active high The ____ software is used to program Rockwell/Allen-Bradley automation systems. Studio 5000 The basic operation of a _____ is to scan instructions, monitor the status of input devices, and produce outputs based on which inputs are on or off.
PLC
To avoid firmware mismatches identify the hardware's firmware revision level by examining the product label or by using _______ to determine the hardware's revision. RSLinx A concern with firmware updates is that an interruption in the update process can make ______ _. The hardware unusable
A(n) ________is a file that contains a hardware configuration and control program. Project Projects can be entered into a PLC memory in one of two ways: PC or Memory module A(n) ______ is used to download hardware configurations and programs to a PLC.
PC
In the RUN mode the programmable controller _______ the ladder logic and sets outputs on or off. scans Allen-Bradley ______ operator interface terminals are programmable operator stations that enable interaction between users and a PLC controlled system or process. PanelView Plus Developers must use the onboard software to configure the terminal's ____ so that a control application can be transferred (downloaded) to the panel. IP address True or False: Operators interact with a PanelView Plus terminal to monitor and control a machine or process. True _____ objects appear on the PanelView's display but do not interact with a PLC's data tags. static _____ is the default communications option for a PanelView Plus terminal. Ethernet ______ objects can be momentary, maintained, latched, or multistate and are operated by touching the object on a touch screen terminal. pushbutton
