Siemens 6ES7635-2SB02-0AC0 SIMATIC C7-635

Name: Siemens 6ES7635-2SB02-0AC0 SIMATIC C7-635
Brand: Siemens
SKU: 6ES7635-2SB02-0AC0
Price: 2320.00 EUR
Availability: InStock

€ 2.320,00

Condition

Clear

SKU: 6ES7635-2SB02-0AC0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens SIMATIC C7-635, part number 6ES7635-2SB02-0AC0, is a compact combined controller and operator panel from the SIMATIC C7 product family. It integrates a SIMATIC S7-300 PLC CPU with an operator panel in a single housing, eliminating the need for separate control and display units. This unit belongs to the C7-635 series, which represents one of the more capable variants in the C7 range, offering enhanced processing power and communication options.

The C7-635 features an integrated STN monochrome or color display with touch and/or key-based operation, depending on the specific variant, and runs the SIMATIC ProTool HMI runtime environment. It includes an MPI/PROFIBUS DP interface for PLC-to-PLC and HMI communication, as well as a PROFIBUS DP master/slave interface for connecting field devices. The integrated CPU is functionally equivalent to a CPU 315-2 DP, providing 128 KB of work memory, support for up to 32 DP slaves, and compatibility with standard S7-300 signal modules. The unit is configured and programmed using STEP 7 for the PLC portion and ProTool for the HMI portion.

The SIMATIC C7-635 is widely used in machine-level automation applications where panel space is limited and a combined HMI and control solution is preferred. Typical industries include packaging machinery, printing, plastics processing, and general-purpose machine building. Its integrated design reduces wiring complexity and cabinet footprint, making it suitable for OEM machine builders seeking a compact and cost-effective automation solution.

Technical Specifications

Series/Product Family	SIMATIC C7-635
Integrated CPU	Equivalent to CPU 315-2 DP
Work Memory	128 KB
Display Type	STN LCD
Display Size	5.7 inch
Input/Operating Voltage	24 V DC
Communication Interface	MPI, PROFIBUS DP (master/slave)
Max. DP Slaves	32
Operating Temperature	0 °C to 55 °C
Storage Temperature	-20 °C to 70 °C
Relative Humidity	10 % to 90 % (non-condensing)
IP/Protection Rating	IP 65 (front panel)
Mounting	Panel mounting
Certifications	CE, UL, cULus

Common Error Codes and System Events

Event ID: 10000: Loss of communication on MPI/PROFIBUS DP interface. The C7 unit cannot establish or maintain connection with a configured network partner.
Check MPI/PROFIBUS cable connections and termination resistors. Verify bus address settings and baud rate configuration in STEP 7. Ensure no address conflicts exist on the bus.
Event ID: 10001: PROFIBUS DP slave failure. One or more configured DP slaves are not responding on the PROFIBUS DP network.
Check power supply and cable connections to the affected DP slave. Verify slave address and configuration in STEP 7 hardware configuration. Replace faulty slave module if necessary.
Event ID: 40000: HMI project download error. The ProTool project could not be transferred to the C7 panel successfully.
Verify the correct COM port or MPI adapter is selected in ProTool transfer settings. Check that the C7 is in transfer mode. Ensure the project is compiled without errors before downloading.
Event ID: 40010: Tag communication error. The HMI runtime cannot read or write a configured PLC tag.
Verify the PLC is in RUN mode and the MPI connection is active. Check that the tag address in ProTool matches the actual data block or memory address in the STEP 7 program.
STOP mode: CPU has entered STOP mode due to a programming error, hardware fault, or configuration mismatch.
Connect STEP 7 via MPI and read the diagnostic buffer (STEP 7 > PLC > Module Information > Diagnostic Buffer) to identify the cause. Correct the program error or hardware configuration and perform a memory reset if required.
SF LED (System Fault): The red SF LED on the C7 unit is illuminated, indicating a system or hardware fault within the integrated CPU.
Read the diagnostic buffer using STEP 7. Common causes include I/O module faults, configuration errors, or CPU hardware failures. Replace faulty I/O modules or the C7 unit if the CPU hardware is defective.
BF LED (Bus Fault): The red BF LED is illuminated, indicating a PROFIBUS DP communication fault. The CPU cannot communicate with one or more DP slaves.
Check PROFIBUS DP wiring, connectors, and bus termination. Verify that all configured DP slaves are powered and addressed correctly. Use STEP 7 hardware diagnostics to identify the specific failing slave.

Frequently Asked Questions

What PLC CPU is integrated into the SIMATIC C7-635?

The C7-635 integrates a CPU functionally equivalent to the SIMATIC S7-300 CPU 315-2 DP, providing 128 KB of work memory and a PROFIBUS DP master/slave interface.

What software is required to program and configure the C7-635?

The PLC portion is programmed using Siemens STEP 7, while the HMI screens are configured using ProTool. Both software packages must be used together for a complete project.

Can the C7-635 be used with standard S7-300 expansion modules?

Yes, the C7-635 supports standard SIMATIC S7-300 signal modules connected via the integrated backplane bus, allowing digital and analog I/O expansion.

What communication interfaces are available on the C7-635?

The unit provides an MPI interface for programming and HMI communication, and a PROFIBUS DP interface that can operate as both master and slave for field device connectivity.

What is the front panel protection rating of the C7-635?

The front panel of the C7-635 carries an IP 65 protection rating, making it suitable for installation in control panels where dust and water spray protection is required.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the power connector of the C7 unit. Check for blown internal fuses. Verify that the supply voltage is within the specified tolerance range.

Ensure the 24 V DC supply is stable and within specification. Replace any blown fuses. If the supply is correct and the display remains blank, the internal power supply or display backlight may be faulty and the unit should be sent for repair or replacement.

CPU remains in STOP mode and will not enter RUN

Connect STEP 7 via MPI adapter and open the diagnostic buffer under PLC > Module Information. Identify the specific fault event causing the STOP condition.

Address the root cause identified in the diagnostic buffer, such as correcting a program block error, resolving an I/O configuration mismatch, or replacing a faulty signal module. Perform a CPU memory reset (MRES) if the configuration is corrupted, then reload the STEP 7 project.

PROFIBUS DP slaves shown as faulty in STEP 7 diagnostics

Check the BF LED on the C7 unit. Use STEP 7 hardware diagnostics to identify which specific DP slave addresses are failing. Inspect PROFIBUS cabling and bus termination at both ends of the segment.

Replace damaged PROFIBUS cables or connectors. Ensure bus termination resistors are enabled only at the physical ends of the bus segment. Verify that each slave is powered and configured with the correct bus address matching the STEP 7 hardware configuration.

HMI screens do not update or show communication errors at runtime

Check the MPI connection between the HMI runtime and the CPU. Verify that the PLC is in RUN mode. Confirm that the tag addresses configured in ProTool match the actual addresses in the STEP 7 program.

Re-establish the MPI connection by checking cable and adapter settings. Correct any mismatched tag addresses in the ProTool project and re-download the HMI project to the C7 panel. Ensure the CPU program is running and the relevant data areas are being written correctly.

C7 unit does not accept project download from ProTool

Verify that the C7 is set to transfer mode (accessible via the Start Center or by holding the appropriate key combination during boot). Check the MPI adapter connection and COM port settings in ProTool transfer configuration.

Set the C7 to transfer mode before initiating the download. Confirm the correct MPI adapter driver is installed on the programming PC and the baud rate matches. If using a PC adapter USB, ensure the driver is correctly installed and the MPI address of the C7 is correctly set in ProTool.

Condition	Repair, Used, Refurbished, New in box (sealed)