Siemens 6ES7623-1SB01-0AC0 SIMATIC C7-623

Name: Siemens 6ES7623-1SB01-0AC0 SIMATIC C7-623
Brand: Siemens
SKU: 6ES7623-1SB01-0AC0
Availability: InStock

Price range: € 1.347,00 through € 1.899,00

Condition

Clear

SKU: 6ES7623-1SB01-0AC0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens SIMATIC C7-623, part number 6ES7623-1SB01-0AC0, is a compact combined controller and operator panel unit belonging to the SIMATIC C7 product family. It integrates a programmable logic controller based on the S7-300 CPU architecture with an operator panel in a single housing, eliminating the need for separate HMI and PLC hardware. This all-in-one design is part of Siemens' strategy to provide space-saving automation solutions for machine-level control.

The C7-623 features an integrated operator panel with a monochrome display and touch-sensitive or membrane keypad interface for direct operator interaction. It supports MPI (Multi-Point Interface) communication for integration into SIMATIC networks and can be programmed using STEP 7 for the PLC portion and ProTool or WinCC flexible for the HMI configuration. The unit provides onboard digital I/O, integrated CPU functionality compatible with the S7-300 instruction set, and supports expansion via standard S7-300 signal modules. Memory is provided via integrated RAM and load memory, with optional memory card support for program backup and transfer.

The SIMATIC C7-623 is designed for use in machine-level automation where panel space is limited and a combined HMI and control solution is preferred. Typical applications include packaging machinery, conveyor systems, small to mid-scale production equipment, and standalone machine tools. Its S7-300 compatibility ensures straightforward integration into existing SIMATIC automation environments across manufacturing and process industries.

Technical Specifications

Series/Product Family	SIMATIC C7
Display Type	Monochrome LCD
Operator Interface	Membrane keypad with function keys
Integrated CPU	S7-300 compatible
Communication Interface	MPI (Multi-Point Interface)
Onboard Digital Inputs	16
Onboard Digital Outputs	16
Input/Operating Voltage	24 V DC
Operating Temperature	0 °C to +55 °C
Storage Temperature	-20 °C to +70 °C
Relative Humidity	10 % to 95 % (non-condensing)
Mounting	Panel mounting
Certifications	CE, UL
Programming Software	STEP 7, ProTool / WinCC flexible

Common System Event Codes

Event ID: 1: General CPU hardware fault detected during startup self-test
Perform a memory reset (MRES) on the CPU. If the fault persists, check for defective memory cards or replace the unit.
Event ID: 16#4520: I/O access error on a configured module address
Verify that all configured I/O modules are correctly seated and powered. Check the hardware configuration in STEP 7 matches the physical setup.
Event ID: 16#2521: Cyclic interrupt OB (e.g. OB35) not loaded but required by configuration
Load the missing organization block into the CPU using STEP 7. Ensure all required OBs are included in the program download.
Event ID: 16#2522: Asynchronous error OB missing (e.g. OB85 for I/O access errors)
Create and download the missing OB to the CPU. OB85 should be added to prevent the CPU from going to STOP on I/O access faults.
Event ID: 16#3501: Cyclic program scan time exceeded (watchdog timeout)
Optimize the user program to reduce scan cycle time. Increase the maximum cycle time setting in the CPU properties within STEP 7 if appropriate.
Event ID: 16#1215: MPI communication error or loss of connection to a configured network node
Check MPI cable connections and terminating resistors. Verify MPI addresses and baud rate settings are consistent across all connected devices.
Event ID: 16#2D00: Battery voltage low or backup battery failure
Replace the backup battery in the C7 unit. Perform a memory reset and reload the user program after battery replacement.

Frequently Asked Questions

What programming software is required for the SIMATIC C7-623?

The PLC portion is programmed using Siemens STEP 7, while the HMI screens are configured using ProTool or WinCC flexible. Both software packages must be used together for a complete C7 project.

Can the C7-623 be expanded with additional I/O modules?

Yes, the C7-623 supports expansion using standard SIMATIC S7-300 signal modules connected via the integrated backplane bus, allowing additional digital and analog I/O to be added as required.

What communication interfaces does the C7-623 support?

The C7-623 includes an MPI interface for connection to SIMATIC networks, programming devices (PGs), and other S7 controllers or HMI devices.

Is the C7-623 compatible with S7-300 program code?

Yes, the integrated CPU in the C7-623 is based on the S7-300 architecture and is compatible with standard S7-300 instruction sets and organization blocks programmed in STEP 7.

What supply voltage does the C7-623 require?

The C7-623 operates on a 24 V DC supply voltage, which must be provided externally via the appropriate power connector.

Troubleshooting

CPU remains in STOP mode after power on

Check the diagnostic buffer in STEP 7 (accessible via PLC > Module Information > Diagnostic Buffer) to identify the specific event causing the STOP state.

Address the fault indicated in the diagnostic buffer, such as loading missing OBs, correcting hardware configuration mismatches, or performing a memory reset (MRES) followed by a full program download.

HMI display is blank or shows no image after power on

Measure the 24 V DC supply voltage at the power input terminals. Check for blown internal fuses and inspect the ribbon cable connection between the display and the main board if accessible.

Restore correct supply voltage within specified tolerances. Replace any blown fuses with the correct rating. If the display hardware is faulty, the unit will require repair or replacement of the display assembly.

MPI communication cannot be established with a programming device

Verify the MPI cable is correctly connected and that bus termination resistors are active at both ends of the MPI segment. Check that the MPI address of the C7 unit matches the address configured in STEP 7.

Correct any address conflicts, ensure proper bus termination, and use a known-good MPI cable. Reset the MPI address via the CPU properties in STEP 7 and perform a new download if necessary.

Digital outputs do not switch despite correct program logic

Check the CPU operating mode (must be in RUN). Verify the output module supply voltage (load voltage) is present. Use the STEP 7 variable table to monitor the output status bits online.

Ensure the load voltage for the output group is correctly wired and within specification. If output bits are set in the program but the physical output does not respond, the output module or output driver circuit may be faulty and require repair.

Program is lost after power cycle

Check the backup battery status via the diagnostic buffer or battery LED indicator. Determine whether a memory card is installed and configured as the load memory source.

Replace the backup battery to maintain RAM contents during power loss. Alternatively, store the program on a memory card so it is automatically loaded on power-up without relying on battery-backed RAM.

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