SIEMENS 6AV6542-0BB15-2AX0

What is the 6AV6542-0BB15-2AX0 and where is it used?

The 6AV6542-0BB15-2AX0 is a SIEMENS SIMATIC OP170B with keypad operation, designed for classic HMI tasks in machine and industrial automation. The device features a 5.7-inch Blue Mode STN display, communicates via MPI/PROFIBUS-DP, and also provides a printer interface and a CF card slot. Typical applications include existing installations with SIMATIC S5, S7-200 or S7-300/400 controllers, where operator screens, alarms, recipes and basic diagnostic functions are required. For maintenance and purchasing departments, the panel is particularly relevant when an existing unit must be replaced on a like-for-like basis, repaired, or kept available for the remaining service life of a legacy system without completely redesigning the visualisation.

Technical specifications at a glance and what they mean

The OP170B is powered by 24 V DC, typically consumes only 6 W, and has a nominal current draw of 0.25 A. The 320 × 240 pixel monochrome display is robust and well suited to traditional operating and alarm functions, although it is not intended for modern graphics-intensive user interfaces. The 24 function keys, including 18 LED-equipped keys, are important for reliable and repeatable operation in production environments.

The panel is rated IP65 on the front and IP20 on the rear. Usable memory for user data is 768 KB, which limits the overall project size. Communication interfaces include optional TTY, 2 × RS232, 1 × RS422 and 1 × RS485 with speeds up to 12 Mbit/s. A CF card slot is also provided for backup and restore functions.

Product status, life-cycle status and obsolescence

For the 6AV6542-0BB15-2AX0, Siemens lists the product status as EOP (End of Product) as of 1 April 2008. Siemens documentation identifies the OP177B Blue Mode and OP177B Colour as successor options. At the same time, Siemens documentation also indicates that there is no direct one-to-one replacement.

In practice, this means that a replacement decision should not be based solely on the product family. Before replacing the panel, the engineering software, communication interfaces, key layout, installation dimensions and the existing machine communication architecture should all be reviewed. For operators of older machines, this makes not only spare-parts procurement important, but also a strategy covering repairs, replacement units and protection of the installed base against unplanned failures.

EICHLER services for the 6AV6542-0BB15-2AX0 in practice

For this panel, repair, exchange and used equipment are particularly relevant because the product has been discontinued while many legacy systems still need to remain operational. Repair is often the preferred option when the original panel already matches the machine mechanically and project-wise, and where the costs and risks of re-engineering should be avoided.

EICHLER specifies short turnaround or delivery times for repair, exchange and used units. Repairs include technical cleaning, preventive maintenance, comprehensive functional testing and a minimum 24-month warranty. An exchange unit is particularly valuable when production must resume as quickly as possible. A used unit can be a practical solution when a compatible panel is urgently required to keep a legacy system running. New units are listed as available on request only.

Is the 6AV6542-0BB15-2AX0 still available directly from the manufacturer?

No. Siemens classifies the device as EOP (End of Product). Consequently, it is not generally offered as a standard new stock item and is typically supported through repair, exchange, used units and new units on request. For operators of legacy systems, this is important because procurement today is less about purchasing new equipment and more about maintaining availability through service, spare-parts strategies and short-term replacement options within the same device class.

Which successor is suitable for the OP170B?

The Siemens documentation lists the OP177B Blue Mode and OP177B Colour as successor options. At the same time, Siemens documentation also indicates that there is no direct one-to-one replacement. In practice, the successor designation alone is not decisive. The key question is whether the engineering environment, communication interfaces, key functions, mechanical dimensions and the behaviour within the existing machine application are compatible. For legacy systems, any replacement device should therefore be technically evaluated before implementation.

Which software can be used to configure the 6AV6542-0BB15-2AX0?

For the OP170B, Siemens specifies ProTool/Lite from Version 5.2 SP2 and WinCC flexible Compact from Version 2004. This is particularly important for maintenance and retrofit projects because the available engineering environment often determines whether a project can be modified, backed up or transferred to a replacement device quickly. Before carrying out service work, it is therefore advisable to identify the available project files and the software version with which they were last maintained.

Which controllers and communication interfaces are supported?

According to Siemens, the device supports communication with S5, S7-200, S7-300/400, TI 505, SINUMERIK, SIMOTION, as well as systems such as Allen Bradley (DF1), Mitsubishi (FX/MP4), Telemecanique and Modicon (Modbus). From a communications perspective, the primary interfaces are MPI and PROFIBUS DP. PROFINET is not supported on this model. For procurement and replacement projects, this means the panel is particularly well suited to legacy installations using serial or fieldbus-based communication rather than modern Ethernet-based HMI architectures without additional modifications.

Can an existing project be transferred to a replacement device without complete re-engineering?

Yes. Provided that a compatible device platform is used, this can generally be achieved through Backup/Restore via CF card or by using ProSave. Siemens describes both methods for this device class. A restore process not only reloads the project data but also resets the panel's internal memory and restores the previously saved configuration. This is particularly valuable in service situations where production needs to resume quickly and the existing visualisation should remain unchanged wherever possible. Before performing a restore, however, it should be verified whether recipes or device-specific settings will also be overwritten.

When is repair more appropriate than exchange or purchasing a used unit?

Repair is usually the preferred option when the original device fits the machine perfectly, the panel is still able to start up or communicate, and project migration or mechanical modifications are to be avoided. Exchange is often the better option when production must be restored as quickly as possible and a compatible replacement device is immediately required. Used units can be attractive when a legacy installation needs to remain operational without investing in a complete visualisation upgrade. With discontinued HMIs, the decision is therefore influenced not only by the purchase price but also by how quickly the machine can be returned to safe and reliable operation.