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6ES5943-7UA11
Siemens Simatic S5 CPU943 Processor Module

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Simatic S5 CPU943 Processor Module
Description

O tomto produkte

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The 6ES5943-7UA11 is a central processing unit (CPU) designed for the Simatic S5-115U range of programmable logic controllers.  The 6ES5943-7UA11 is sometimes refered to as the CPU943. The 6ES5943-7UA11 features 1 serial interface and can be replaced with the 6ES5943-7UB21 which features 2 serial interface solts.

 

Application

The 6ES5943-7UA11 can be programmed in the STEP 5 programming language. For programming under GRAPH 4 the standard function block of the same name is required.

 

Design

The 6ES5943-7UA11 central processing unit contains:

  • STEP 5 processor for processing the user program
  • Internal prgoram memory (RAM)
  • Integral hardware clock (in CPUs with 2 interfaces)
  • Receptacle for 375 memory submodule (RAM/EPROM/EEPROM)
  • Run/Stop switch with corresponding LEDs
  • Switch for setting retentiveness of bit memories, timers and counters
  • Switch for overal reset (resetting the entire user RAM of the CPU)
  • Built in 20 mA (current loop) interface for connection of a programming device or operator panel or for connection to the Sinec L1 LA

 

Expansion Modules for 6ES5943-7UA11

RAM submodules extend the internal RAM on the 6ES5943-7UA11. When the RAM submodules are removed from their receptacles in the CPU, the data is erased. Programs and data can be stored on 375 memory submodules (EPROM or EEPROM) to protect them from power failure. The memory submodule are programmed on the programming device using the receptacle provided for this purpose and are then plugged into the CPU. Direct Industrail offer a wide range of RAM submodule and can offer assitance programming these units.

 

Functions
Program Execution on 6ES5943-7UA11
  • Cyclic (OB 1): Read-in of input statuses, execution of the control program and output of the output statuses
  • Time Controllerd (OB 10 to OB 13). Four independent levels for which the time of processing can be individually defined (times from 10 ms to 1 min)
  • Interrupt Controlled (OB 2 to OB 5). Activation of four independent execution levels by process interrupts
  • Time interrupt controlled (OB 6) This level is activated after expiry of a programmed time (times from 3 ms to 1 min
Execution levels of higher priority can interrupt those of lower priorityafter any STEP 5 operation (order of priority starting with the highest: time interrupt controlled, interrupt controlled, time controlled, cycclic.
 
Monitoring
 
The CPUs monitor scan time, battery failure or acknowledment delay for example
 
Software Protection for RAM Operation
 
The software protection feature prevents inadvertent overwriting or read out of programs by unauthorized persons
 
Scan time measurements
 
The current maxiumum and minimum scan times are measured.
 
Clock

The clock can be set and read. It can also be used for counting operating hours or interrupt functions

Integral Function Blocks

The operation system incorporates a number of functions block programmed in machine language, which can execute at extremely high speeds and do not occupy any space in the integral function blocks. These integral function blocks are called in the same way as any other blocks in the user program and can only be interrupted by process interrupts.

  • Conversion blocks (BCD code converters)
  • Arithmetic Blocks (multiplication division)
  • Analog Value Processing
  • Data handling blocks (these enable communications proceesors and intelligent I/O modules to be used and control the exchange of data with the CPU)
  • COMP function block for compressing the content of the internal RAM
  • DELETE funcion blocl
Integral Organization Block
  • Scan time tiggering
  • Variable time loop 
  • PID control algorithm
  • Scan cycle independent read in of digital input and output of the process I/O image
Restart Modes
  • Manual cold restart using mode selector or programming device
  • Cold restart following power failure
 
Technical Specifications of 6ES5943-7UA11
 
Total Memory Capacity    (Kbytes)         48
Internal RAM  (Kbytes)48
Submodule RAM/EPROM/EEPROM  (Kbytes)      :- / 64 / 16
Submodule Flash EPROM  (Kbytes) 
Memory Extension with CP516/581   8/120 Mbytes
Programming LanguageSTEP 5
Max Number of Blocks256
Block Nesting Depth32
Programming ExecutionInterrupt possible after any STEP 5 operation
Time Controlled4 Execution levels OB 10 to OB 13
Call Interval1 ms to 1 min - 10 ms to 10 min
Interrupt Controlled4 execution levels OB 2 to OB 5
Time Interrupt Controlled1 execution level OB 6
Execution time for Bit Operation0.8 us
Execution time for Load and Transfer1.5 us
Execution time for Timer Counter Operation1.8 us
Execution time for Subsitution Operations160 us
Execution time for Block Call Operation0.7/3.6 us
Interrrupt Response time2 ms
Nesting levels6 (for Binary logic operations)
Timers Numbers128
Timer Range0.01 to 9990s all 64 or none of which retentive
Counter Number128
Counter Range0 to 999 (up/down) 64 or none of which retentive
Digitial Inputs/Outputs4096/4096
No with process I/O image1024 each
Analog Inputs / Outputs256/256
Current Consumption with 1 interface0.16A
Current Consumption with 2 interface 
PDFs

špecifikácia

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ManufacturerSiemens
Alternative Partnumber6ES5 943-7UA11
Range typeProcessor Module
RangeSimatic S5
PDFs

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