Safety GuidelinesThis manual contains notices which you should observe to ensure your own personal safety as well as to avoidproperty damage. The notices referring to your personal safety are highlighted in the manual by a safety alertsymbol, notices referring to property damage only have no safety alert symbol. Dangerindicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. Warningindicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. Cautionused with the safety alert symbol indicates a potentially hazardous situation which, if not avoided, mayresult in minor or moderate injury. Cautionused without safety alert symbol indicates a potentially hazardous situation which, if not avoided, mayresult in property damage.
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Quick Links. Table of Contents. Controller Siemens S Driver Manual 28 pages. Prodave s7 v5. For the latest product approvals, contact your local Siemens distributor or sales office. Agency Certificate Number Page 5 FAQs , product updates, or application tips, refer to the following Internet addresses: www.
Page 6 Siemens products that you are using, they can provide the fastest and most efficient answers to any problems that you might encounter. S CPU. Conventions Used to Describe the Instructions. Page 9 Contents Shift and Rotate Instructions Shift Right and Shift Left Instructions. Features of the Modem Module. Page 11 Contents Error Codes Fatal Error Codes and Messages. The S monitors inputs and changes outputs as controlled by the user program, which can include Boolean logic, counting, timing, complex math operations, and communications with other intelligent devices.
Table briefly compares some of the features of the CPU. Page S Expansion Modules CD that contains an electronic version of this manual, application tips, and other useful information. Your computer or programming device should meet the following minimum requirements In just a few short steps using a simple example, you can learn how to connect, program, and run your S For this example, you only need to connect power to your S CPU and then connect the communications cable between your programming device and the S CPU.
Figure shows a new project. Navigation bar Notice the navigation bar. This program uses six instructions in three networks to create a very simple, self-starting timer that resets itself. See Figure Notice the instruction tree and the program editor. You use the instruction tree to insert the LAD instructions into the networks of the program editor by dragging and dropping the instructions from the instruction tree to the networks. To enter the Compare instruction: Double-click the Compare icon to display the compare instructions.
When you save the program, you create a project that includes the S CPU type and other parameters. You can use the mounting holes to attach the modules to a panel, or you can use the built-in clips to mount the modules onto a standard DIN rail.
The small size of the S allows you to make efficient use of space. Separate the S Devices from Heat, High Voltage, and Electrical Noise As a general rule for laying out the devices of your system, always separate the devices that generate high voltage and high electrical noise from the low-voltage, logic-type devices such as the S Pay careful attention to your system configuration to ensure that your CPU can supply the 5V power required by your selected expansion modules.
Refer to Table for the mounting dimensions. Page 29 Installing the S Chapter 3 Using DIN rail stops could be helpful if your S is in an environment with high vibration potential or if the S has been installed vertically. If your system is in a high-vibration environment, then panel-mounting the S will provide a greater level of vibration protection. Page Guidelines For Grounding And Wiring S Programmable Controller System Manual Guidelines for Grounding and Wiring Proper grounding and wiring of all electrical equipment is important to help ensure the optimum operation of your system and to provide additional electrical noise protection for your application and the S Prerequisites Before you ground or install wiring to any electrical device, ensure that the power to that equipment has been turned off.
Page 31 Installing the S Chapter 3 Guidelines for Grounding the S The best way to ground your application is to ensure that all the common connections of your S and related equipment are grounded to a single point. This single point should be connected directly to the earth ground for your system. Page 32 S Programmable Controller System Manual Guidelines for Suppression Circuits You should equip inductive loads with suppression circuits to limit voltage rise when the control output turns off.
Suppression circuits protect your outputs from premature failure due to high inductive switching currents. Page Plc Concepts PLC Concepts The basic function of the S is to monitor field inputs and, based on your control logic, turn on or off field output devices. This chapter explains the concepts used to execute your program, the various types of memory used, and how that memory is retained.
Page 35 PLC Concepts Chapter 4 Reading the Inputs Digital inputs: Each scan cycle begins by reading the current value of the digital inputs and then writing these values to the process-image input register. Analog inputs: The S does not update analog inputs as part of the normal scan cycle unless filtering of analog inputs is enabled.
You can explicitly identify the memory address that you want to access. This allows your program to have direct access to the information. Two variables are associated with a timer: Current value: this bit signed integer stores the amount of time counted by the timer. Timer bit: this bit is set or cleared as a result of comparing the current and the preset value. High-speed counters have a signed, bit integer counting value or current value.
To access the count value for the high-speed counter, you specify the address of the high-speed counter, using the memory type HC and the counter number such as HC0. You can use these bits to select and control some of the special functions of the S CPU, such as: a bit that turns on for the first scan cycle, a bit that toggles at a fixed rate, or a bit that shows the status of math or operational instructions.
You access these values by the area identifier AI , size of the data W , and the starting byte address. Page 42 S Programmable Controller System Manual Format for Strings A string is a sequence of characters, with each character being stored as a byte. The first byte of the string defines the length of the string, which is the number of characters. Figure shows the format for a string. Pointers are double word memory locations that contain the address of another memory location.
You then increment the pointer by an offset stored in VD The S stores the following elements on the memory cartridge: the program block, the data block, the system block, and the forced values.
As you increase the percentage of time that is dedicated to processing communications requests, you increase the scan time, which makes your control process run more slowly. You can define ranges of addresses in the following memory areas to be retentive: V, M, C, and T. For timers, only the retentive timers TONR can be retained. The filtered value is the average value of a preselected number of samples of the analog input.
The filter specification number of samples and deadband is the same for all analog inputs for which filtering is enabled. Scan cycle Next scan cycle Input update Input update Physical Input The S misses this pulse because the input turned Output from pulse catch on and off before the S updated the process-image input register Disabled Read and write user data Access Access Access Clearing the memory puts the S in STOP mode and resets the S to the factory-set defaults, except for the network address, baud rate, and the time-of-day clock.
The following general guidelines can apply to many design projects. Page 62 S Programmable Controller System Manual Main Program The main body of the program contains the instructions that control your application.
The S executes these instructions sequentially, once per scan cycle. The main program is also referred to as OB1. Subroutines These optional elements of your program are executed only when called: by the main program, by an interrupt routine, or by another subroutine.
Ladder programs allow the program to emulate the flow of electric current from a power source through a series of logical input conditions that in turn enable logical output conditions.
Over the last several years, the International Electrotechnical Commission IEC has developed an emerging global standard that specifically relates to many aspects of PLC programming. Power flow must be present at this input for the box instruction to be executed. In Chapter 6, instructions that have an associated wizard are identified by the following Instruction Wizard icon: Instruction Wizard During normal operation, the S periodically checks the status of each module and compares it against the configuration obtained during startup.
You can make assignments to bytes, words, or double words of V memory. Comments are optional. Data The data block editor is a free-form text editor; Page Using Local Variables Programming Concepts, Conventions, and Features Chapter 5 Using Local Variables You can use the local variable table of the program editor to assign variables that are unique to an individual subroutine or interrupt routine.
Local variables can be used as parameters that are passed in to a subroutine and they increase the portability or reuse of a subroutine. S Memory Ranges and Features. Conditional End. Page Conventions Used To Describe The Instructions S Instruction Set Chapter 6 Conventions Used to Describe the Instructions Figure shows a typical description for an instruction and points to the different areas used to describe the instruction and its operation.
The operand table lists the operands for the instruction and shows the valid data types, memory areas and sizes for each operand. The standard contact instructions obtain the referenced value from the memory or process-image register if the data type is I or Q.
Page 79 S Instruction Set Chapter 6 Because the Positive Transition and Negative Transition instructions require an on-to-off or an off-to-on transition, you cannot detect an edge-up or edge-down transition on the first scan. During the first scan, the S sets the state of the bit specified by these instructions. On subsequent scans, these instructions can then detect transitions for the specified bit. When the Output instruction is executed, the S turns the output bit in the process-image register on or off.
The result is loaded in the top of stack. After the ALD is executed, the stack depth is decreased by one. The Reset Dominant Bistable is a latch where the reset dominates. Load the station address of case packer 1. Load a pointer to the data in the remote station.
The Receive instruction RCV initiates or terminates the receive message function. You must specify a start and an end condition for the Receive box to operate.
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