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        • Lifecycle status

          Discontinued / Obsolete by OEM
          Apter Power provides 6ES5941-7UA12 quotations, manuals, program review, and exact-CPU matching.

        6ES5941-7UA12

        / 4.9
        1001 reviews ｜ Need a Specific Revision?
        Siemens 6ES5941-7UA12 is a SIMATIC S5-115U CPU 941 processor that executes the control program and coordinates the controller I/O.
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        Ships by Wednesday, October 28
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        Warranty Policy
        We provide 1 year warranty for all remaining parts.
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        Return Notice
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
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        Technical specifications for 6ES5941-7UA12

        • Manufacturer:
          Siemens
        • Part Number:
          6ES5941-7UA12
        • Product Family:
          Siemens Simatic S5
        • Product Type:
          SIMATIC S5-115U CPU 941 Processor Module
        • Stock:
          1
        • Processor Type:
          CPU 941
        • Control System:
          SIMATIC S5-115U
        • Internal Program Memory:
          2 KB RAM
        • Maximum Program Capacity:
          18 KB
        • Typical Execution Time:
          Approximately 10 ms per 1000 statements
        • Default Cycle Monitoring:
          Approximately 500 ms
        • Program Scanning:
          Cyclic, interrupt-driven and time-controlled
        • Digital Input Address Capacity:
          1024 inputs
        • Digital Output Address Capacity:
          1024 outputs
        • Analog Input Address Capacity:
          64 words
        • Analog Output Address Capacity:
          64 words
        • Flag Memory:
          1024 flags
        • Timers:
          128
        • Counters:
          128
        • Timer Range:
          0.01 to 9990 s
        • Counter Range:
          0 to 999
        • Instruction Set:
          Approximately 170 operations
        • Weight:
          1.7637 lbs (0.8 kg)
        • Tariff Code:
          8537101190
        • Country of origin:
          Germany
        • Place of shipment:
          Xiamen,Fujian,China
        By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

        More Information

        Overview Manuals Program Scan Memory Resources Event Processing Program Transfer

        Features:

        • The CPU 941 scans the S5-115U user program and maintains the process image.
        • Flags, timers, counters, and analog or digital addresses support program execution.
        • Cycle, interrupt, and time-controlled processing serve different event paths.
        Input states enter the process image before the cyclic logic runs.

        Program results update the output image after the assigned operations complete.

        A replacement requires both the correct CPU execution and the retained project data.

        The Siemens 6ES5941-7UA12 SIMATIC S5-115U CPU 941 Processor may remain available for quotation and support beyond End-Of-Life (EOL) by the manufacturer (OEM).
        Siemens 6ES5941-7UA12 SIMATIC S5-115U CPU 941 Processor Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

        Moving process values through one controller cycle

        • Input image: The CPU copies field input states into the process image.
        • Logic execution: The user program evaluates those states with the configured operations.
        • Output image: Calculated results are transferred to the addressed outputs.
        • Cycle monitor: Execution time is checked against the configured limit.

        Relating stored logic to working controller data

        • Program RAM: Internal memory holds the active portion of the user logic.
        • Flags: Bit memory carries intermediate states between program operations.
        • Timers: Configured time values govern delayed or duration-based actions.
        • Counters: Event counts are retained and evaluated within their assigned range.

        Separating cyclic logic from scheduled or interrupt tasks

        • Cyclic blocks: Normal control logic runs in the repeating program scan.
        • Interrupt blocks: Configured events call the assigned higher-priority processing.
        • Time blocks: Scheduled tasks execute at their defined intervals.
        • Return path: The CPU resumes the interrupted program after the event block completes.

        Restoring controller behavior with the replacement CPU

        • Project copy: The approved S5 program provides the logic and block structure.
        • Address match: Rack and I/O assignments must correspond to the installed modules.
        • Retentive data: Required flags, timers, counters, and startup values are preserved.
        • Commissioning: Inputs are verified before the restored program is allowed to drive outputs.
        Description
        Siemens 6ES5941-7UA12 is a CPU 941 processor module for the SIMATIC S5-115U programmable controller. It scans the stored user program, updates process I/O, and coordinates the timers, counters, flags, and interrupt tasks used by the control system.

        During a cyclic scan, 6ES5941-7UA12 reads the process input image, executes the control instructions, and transfers the resulting states to the output image. Interrupt-driven and time-controlled blocks can alter that sequence when a configured event requires processing outside the normal cycle.

        The memory organization of 6ES5941-7UA12 links program capacity with the addressing available for digital and analog I/O, flags, timers, and counters. A replacement therefore needs the complete user program and memory arrangement, not only the physical CPU module.

        Cycle monitoring on 6ES5941-7UA12 detects execution that exceeds the configured time boundary. When restoring an S5-115U system, rack position, I/O addresses, startup blocks, retentive data, and program version must agree before outputs are returned to service.
        Alternative Names
        6ES59417UA12 6ES5 941-7UA12 6ES5941 7UA12 Siemens 6ES5941-7UA12 CPU 941 6ES5941-7UA12 S5-115U 6ES5941-7UA12 6ES 5941 7UA12 6ES5941/7UA12
        Technical notes
        Preserve the user program, memory configuration, rack assignment, I/O addresses, timers, counters, and startup conditions before replacing Siemens 6ES5941-7UA12.
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        FAQS

        The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
        VIEW ALL FAQS
        What must be saved before replacing Siemens 6ES5941-7UA12?
        Save the Siemens 6ES5941-7UA12 user program, block list, memory arrangement, I/O addresses, startup blocks, retentive flags, timers, counters, and current project version.
        Why can 6ES5941-7UA12 enter a cycle-time fault after a program change?
        The 6ES5941-7UA12 logic may exceed its cycle-monitoring limit because of added instructions, repeated loops, interrupt load, or a changed timing configuration.
        How does Siemens 6ES5941-7UA12 use the process image?
        Siemens 6ES5941-7UA12 reads inputs into the process image before cyclic logic and transfers the calculated output image to field outputs after program execution.
        Can the user program alone confirm that 6ES5941-7UA12 is ready to run?
        No. 6ES5941-7UA12 also requires the matching rack, I/O addresses, memory arrangement, power, startup state, and verified field signals.
        What should be compared when outputs differ after changing Siemens 6ES5941-7UA12?
        Compare the Siemens 6ES5941-7UA12 program checksum, startup blocks, I/O mapping, retentive data, force states, cycle diagnostics, and physical module addressing.

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