SIEMENS 6AV6642-0DC01-1AX0

What is 6AV6642-0DC01-1AX0 and where is it used?

6AV6642-0DC01-1AX0 is a SIEMENS SIMATIC OP177B DP Blue Mode from the range of HMI operator panels featuring touch and key operation. The panel is designed for machine and system operation where process values need to be visualised, operator commands must be executed reliably, and machine statuses displayed directly at the point of operation. Typical applications include older SIMATIC S7, MPI and PROFIBUS-DP environments, retrofit projects, existing installations using WinCC flexible, and applications where robust local operation with dedicated function keys is more important than modern colour visualisation. With its combination of display, keypad, MMC slot and serial interfaces, the device is particularly suitable for maintenance engineers and purchasing departments that need to identify, replace or repair an existing panel.

Overview of the key technical specifications and what they mean

The panel features a 5.7-inch LCD STN display with a resolution of 320 × 240 pixels and 4 Blue Mode colour levels, combined with a resistive touchscreen and membrane keyboard. For service applications, the F1 to F14 and K1 to K18 keys are especially important, as they allow operating functions to be triggered reliably even when wearing gloves or working in harsh industrial environments. The device is powered by 24 V DC with an allowable range of 20.4 to 28.8 V DC. Communication interfaces on the OP177B DP include RS-422/RS-485 and USB, while supported MultiMediaCards can also be used. When correctly installed with the appropriate gasket and mounting clamps, the front of the panel achieves IP65 / NEMA 4X / NEMA 12 protection. In practice, this means reliable integration into existing control cabinets, while maintaining strict requirements for installation quality and spare-part compatibility.

Product status, life-cycle status and obsolescence

For 6AV6642-0DC01-1AX0, EICHLER lists the product status as EOP: 11 July 2008. Siemens also classifies this material number as phased out / discontinued. For operators of older installations, this is a key consideration: new units are generally no longer readily available, making repair, exchange units, refurbished devices and spare-parts management increasingly important. Siemens documents a migration path for the OP177B Mono family in its migration guide, where the KP700 Comfort (6AV2124-1GC01-0AX0) is identified as the replacement for OP177B Mono 6AV6642-0DC01-1AX1. For the AX0 variant discussed here, actual interchangeability should always be verified based on the project configuration, communication interfaces and installation conditions.

Available EICHLER services and their practical benefits

For this panel, EICHLER offers repair, exchange and refurbished units. Repairs are specified with a turnaround time of 1–3 days and include technical cleaning, preventive maintenance, comprehensive functional testing, and a minimum 24-month warranty. This combination is particularly valuable when an installed panel fails but the machine cannot easily be upgraded to a new HMI platform due to existing project files, communication interfaces or validation requirements. For maintenance teams, this helps minimise downtime. For purchasing departments, it reduces the risk of having no immediate solution available for a discontinued panel. For decision-makers, it provides a practical way to maintain system availability despite obsolescence, without immediately triggering a complete HMI redesign.

Is 6AV6642-0DC01-1AX0 still available as a new product?

6AV6642-0DC01-1AX0 is no longer a current standard product. Siemens lists this material number as discontinued, and EICHLER additionally specifies an EOP (End of Production) status dated 11 July 2008. For purchasing and maintenance departments, this means that the realistic options today are usually repair, exchange units, tested refurbished devices, or a planned migration strategy. Anyone looking to minimise downtime risks should therefore consider not only the availability of replacement hardware, but also serviceability, backup strategy, and project availability.

Which software is required for engineering, transfer and service?

According to the product documentation, the panel is engineered using WinCC flexible 2005. For service activities such as backup, restore, or operating system updates, ProSave is also required. Siemens describes the use of ProSave for OS updates and restoring factory settings and notes that a touchscreen recalibration is often necessary afterwards. For operators of older installations, it is therefore important to ensure that not only the replacement panel but also the appropriate engineering environment remains available.

Can I simply replace an OP177B DP with an OP177B PN/DP on a one-to-one basis?

A direct backup/restore replacement is not always possible. Practical cases involving OP177B and TP177B devices have shown that different device types may be recognised as incompatible during the restore process. Siemens does provide a migration path from the OP177B Mono family towards the KP700 Comfort, but this is not a direct plug-and-play replacement. As soon as communication interfaces, bootloader version, device type, or project version differ, the original WinCC flexible project is generally required to adapt the device type and download the project correctly.

Which interfaces and operating options does the panel provide?

The OP177B DP combines a touchscreen with a membrane keyboard. Available keys include F1 to F14 and K1 to K18, which is particularly advantageous for repetitive operating sequences, glove operation, or environments with dirt and contamination. On the hardware side, the panel provides RS-422/RS-485 and USB interfaces. Via USB, devices such as a mouse, keyboard, printer, or USB memory stick can be connected. The panel also features an MMC slot. For existing installations, this combination is valuable because many established communication and service concepts can continue to be used without major modifications.

Why is repair often more practical than an immediate retrofit?

For a discontinued HMI such as the OP177B DP Blue Mode, a complete retrofit is often considerably more complex than replacing or repairing the existing device. In addition to the panel itself, factors such as project engineering, communication interfaces, panel cut-out dimensions, key assignments, documentation, and validation status frequently need to be addressed. EICHLER offers repairs for this model with a turnaround time of 1–3 days, including technical cleaning, preventive maintenance, functional testing, and a minimum 24-month warranty. For many operators, this is the fastest way to reduce downtime costs and return an existing machine to productive operation without immediately undertaking a full project migration.

What should I pay particular attention to regarding memory cards, backup and restore?

Only approved HMI MultiMediaCards (MMCs) should be used with the OP177B. An S7 MMC is not the correct type of card and may cause problems when used in the panel. In addition, backup and restore functions operate reliably only when the target device is identical or genuinely compatible. When restore issues occur, three key checks should be performed in this order: correct memory card type, exact device type, and matching project and operating system version. Only when these factors match correctly is a fast replacement without a complete project re-download realistically possible.