Siemens 6ES7623-1AE00-0AE3 SIMATIC C7-623

Name: Siemens 6ES7623-1AE00-0AE3 SIMATIC C7-623
Brand: Siemens
SKU: 6ES7623-1AE00-0AE3
Availability: InStock

Price range: € 749,00 through € 1.519,88

Condition

Clear

SKU: 6ES7623-1AE00-0AE3 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens SIMATIC C7-623, part number 6ES7623-1AE00-0AE3, is a compact combined controller and operator panel unit belonging to the SIMATIC C7 product family. It integrates a SIMATIC S7-300 compatible CPU with an operator panel into a single housing, eliminating the need for separate PLC and HMI components. This all-in-one design is intended for space-constrained control cabinet installations where both control logic and local operator interaction are required.

The C7-623 features an integrated monochrome display with touch or membrane keypad input, onboard digital I/O, and MPI (Multi-Point Interface) communication for integration into SIMATIC networks. It supports STEP 7 programming software for the PLC portion and ProTool or WinCC flexible for the HMI configuration, allowing both control and visualization to be engineered from standard Siemens toolchains. The unit includes integrated EEPROM and RAM for program and data storage, and supports expansion via standard S7-300 signal modules through the integrated backplane bus interface.

The SIMATIC C7-623 is typically deployed in machine-level automation tasks in industries such as packaging, material handling, textile machinery, and general manufacturing. Its compact integrated form factor makes it well suited for OEM machine builders who require a cost-effective, space-saving solution combining local HMI and PLC functionality without the complexity of separate interconnected devices.

Technical Specifications

Series/Product Family	SIMATIC C7
Display Type	Monochrome LCD
Input/Operating Voltage	24 V DC
Communication Interface	MPI (Multi-Point Interface)
Integrated Digital Inputs	16
Integrated Digital Outputs	16
Programming Software	STEP 7 (PLC), ProTool / WinCC flexible (HMI)
Operating Temperature	0 °C to +55 °C
Storage Temperature	-20 °C to +70 °C
Relative Humidity	10 % to 95 % (non-condensing)
IP/Protection Rating	IP 65 (front panel)
Mounting	Panel mounting
Certifications	CE, UL, cULus

Common Error Codes & System Events

Event ID: 10000: General PLC stop event — the CPU has transitioned to STOP mode due to a programming or configuration error.
Connect STEP 7 programmer, read the diagnostic buffer, identify the cause of the STOP, correct the program or configuration, and restart the CPU.
Event ID: 10006: Watchdog timeout — the cyclic program execution exceeded the configured maximum cycle time.
Increase the maximum cycle time in the CPU properties in STEP 7, or optimize the user program to reduce scan cycle duration.
Event ID: 13000: I/O access error — the CPU attempted to access a peripheral I/O address that is not available or not configured.
Check the hardware configuration in STEP 7, verify that all configured modules are physically present and correctly addressed.
Event ID: 25000: Battery or backup power failure — the internal backup battery is low or missing, risking loss of retentive data.
Replace the backup battery with the correct Siemens replacement type. Reload the user program and data if retentive memory was lost.
Event ID: 28000: MPI communication error — loss of communication on the MPI network.
Check MPI cable connections, verify network termination resistors are correctly placed at both ends of the bus, and confirm matching MPI addresses and baud rates.
Event ID: 40000: HMI configuration mismatch — the loaded HMI project does not match the connected PLC configuration or tag addresses.
Re-transfer the correct HMI project using ProTool or WinCC flexible, ensuring tag addresses match the current STEP 7 hardware and software configuration.
Event ID: 3000F: STOP caused by programming error — illegal instruction or access to an invalid memory area detected during program execution.
Review the diagnostic buffer in STEP 7 for the exact OB or block causing the fault, correct the program logic, and perform a memory reset followed by a fresh download.

Frequently Asked Questions

Is the SIMATIC C7-623 compatible with STEP 7 programming software?

Yes, the PLC portion of the C7-623 is programmed using Siemens STEP 7 (version 5.x), which supports the integrated S7-300 compatible CPU. The HMI portion is configured separately using ProTool or WinCC flexible.

What communication interface does the C7-623 support?

The C7-623 supports MPI (Multi-Point Interface) for communication with STEP 7 programming tools, other SIMATIC S7 controllers, and HMI devices on the same MPI network.

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

Yes, the C7-623 supports expansion with standard SIMATIC S7-300 signal modules via its integrated backplane bus, allowing additional digital or analog I/O to be added as required by the application.

What is the supply voltage for the C7-623?

The C7-623 operates on a 24 V DC supply voltage, which must be provided externally from a suitable regulated power supply.

What is the front panel protection rating of the C7-623?

The front panel of the C7-623 carries an IP 65 protection rating, making it suitable for installation in environments where dust and water spray may be present.

Troubleshooting

CPU remains in STOP mode after power on

Connect a STEP 7 programmer via MPI and read the diagnostic buffer to identify the specific event causing the STOP. Check for configuration errors, missing modules, or program faults.

Correct the identified fault in the STEP 7 project, perform a memory reset on the CPU if necessary, and reload the user program. Verify hardware configuration matches the physical setup.

HMI display shows no communication to PLC

Check the MPI connection between the HMI and PLC portions. Verify that the MPI address configured in the HMI project matches the CPU MPI address set in STEP 7 hardware configuration.

Correct the MPI address in the HMI project or in the CPU properties, re-transfer the HMI project, and cycle power. Ensure MPI bus termination is correctly applied.

Display remains blank after power on

Measure the 24 V DC supply voltage at the power input terminals. Check for blown internal fuses. Verify the power supply unit is capable of providing sufficient current for the C7 unit.

Restore correct 24 V DC supply voltage. Replace any blown fuses with the correct rated type. If the internal power supply module is faulty, the unit will require workshop-level repair or replacement.

Retentive data lost after power cycle

Check the status of the internal backup battery. A low or missing battery will cause loss of retentive memory areas (M, DB, T, C) when the 24 V DC supply is removed.

Replace the backup battery with the correct Siemens replacement. After battery replacement, reload the user program and reinitialize any retentive data areas as required by the application.

I/O modules not recognized after expansion

Verify that the newly added S7-300 signal modules are correctly seated on the backplane rail and that the hardware configuration in STEP 7 has been updated to include the new modules at the correct slot addresses.

Update the STEP 7 hardware configuration to match the physical module arrangement, compile and download the updated configuration to the CPU, and perform a power cycle to reinitialize the I/O bus.

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