Siemens 6AV6234-1BR00-0BX1 SIMATIC OP 27

SKU: 6AV6234-1BR00-0BX1 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6234-1BR00-0BX1 is an Operator Panel (OP 27) belonging to the SIMATIC HMI family, designed for operator control and monitoring tasks in industrial automation environments. This unit provides a monochrome graphical display interface and is intended for use with Siemens SIMATIC S5 and S7 PLC families. It is a panel-mount device offering a compact and robust solution for machine-level HMI applications.

The OP 27 features a 5.7-inch STN monochrome LCD display with a resolution of 240 x 128 pixels, providing clear visualization of process data, alarms, and operator prompts. It supports communication via MPI (Multi-Point Interface) and PROFIBUS-DP, enabling direct integration with SIMATIC S7-300 and S7-400 controllers. The unit is configured using SIMATIC ProTool software and includes membrane keypad input with function keys, numeric keys, and system keys for operator interaction. It operates on a 24 V DC supply and is rated to IP65 on the front panel.

The OP 27 is widely deployed in machine building, manufacturing automation, and process control applications where a reliable and straightforward operator interface is required. It is particularly suited for controlling conveyor systems, packaging machinery, press lines, and general-purpose industrial machines. Its compatibility with the SIMATIC S5 and S7 controller families makes it a common retrofit and replacement choice in existing Siemens-based automation installations.

Technical Specifications

Display Size	5.7 inch
Display Type	STN LCD, Monochrome
Display Resolution	240 x 128 pixels
Input Type	Membrane keypad (function keys, numeric keys, system keys)
Input/Operating Voltage	24 V DC
Power Consumption	Max. 15 W
Communication Interface	MPI, PROFIBUS-DP
IP/Protection Rating	IP65 (front panel)
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90%, non-condensing
Mounting	Panel mount
Configuration Software	SIMATIC ProTool
PLC Compatibility	SIMATIC S5, S7-300, S7-400

Common Error Codes and System Events

Event ID: 10000: Communication error between OP and PLC. The operator panel cannot establish or maintain a connection to the configured controller.
Check MPI or PROFIBUS-DP cable connections and termination resistors. Verify the PLC address settings match the OP configuration. Ensure the PLC is in RUN mode.
Event ID: 10001: Timeout on the communication link. The OP did not receive a response from the PLC within the expected time frame.
Check network cabling and bus termination. Verify baud rate settings on both the OP and PLC. Reduce bus load if multiple nodes are present.
Event ID: 20000: Configuration data error. The project data loaded on the OP is inconsistent or corrupted.
Reload the project from SIMATIC ProTool to the OP. Ensure the correct project version is transferred and that the transfer completed without errors.
Event ID: 40000: Operating system error or internal device fault detected during self-test.
Perform a power cycle. If the fault persists, reload the operating system firmware via the transfer mode. Contact Siemens support if the issue continues.
Event ID: 50000: Memory error. Insufficient memory available to load or display the configured project.
Reduce the size of the project (number of screens, variables, or messages) and reload. Check that the project does not exceed the OP 27 memory limits.
Alarm Buffer Overflow: The alarm buffer is full and new alarms cannot be logged. Older alarm entries are being overwritten.
Acknowledge and clear pending alarms. Review the alarm configuration in ProTool to reduce the number of simultaneous active alarms or increase buffer handling logic.
Transfer Mode Active: The OP is in data transfer mode and is waiting for a project download from the configuration PC.
Initiate the project transfer from SIMATIC ProTool on the connected PC, or restart the OP to exit transfer mode if a transfer is not intended.

Frequently Asked Questions

Which PLCs are compatible with the OP 27 (6AV6234-1BR00-0BX1)?

The OP 27 is compatible with SIMATIC S5 and S7 PLC families, including S7-300 and S7-400 controllers, via MPI or PROFIBUS-DP communication interfaces.

What software is used to configure and program the OP 27?

The OP 27 is configured using SIMATIC ProTool software. Projects are created on a PC and downloaded to the panel via the MPI or serial interface.

What is the display type and resolution of the OP 27?

The OP 27 features a 5.7-inch STN monochrome LCD display with a resolution of 240 x 128 pixels.

What is the supply voltage required for the OP 27?

The OP 27 operates on a 24 V DC supply voltage.

What is the front panel protection rating of the OP 27?

The front panel of the OP 27 is rated to IP65, providing protection against dust ingress and low-pressure water jets.

Troubleshooting

Display remains blank after power on

Check that 24 V DC is present at the power supply terminals. Inspect the internal fuse if accessible. Verify that the power supply can deliver sufficient current.

Ensure the 24 V DC supply is within tolerance and capable of supplying the required current. Replace the internal fuse if blown. If the display remains blank, the internal power supply board or backlight may require replacement.

OP 27 cannot communicate with the SIMATIC PLC

Verify MPI or PROFIBUS-DP cable connections at both the OP and PLC ends. Check bus termination at both ends of the network. Confirm that the MPI address and baud rate configured in the OP project match the PLC settings.

Correct any wiring faults and ensure proper bus termination resistors are enabled. Align the MPI address and baud rate settings in the ProTool project with the PLC configuration and reload the project to the OP.

Project transfer from ProTool PC fails or does not complete

Check the PC-to-OP communication cable (MPI or serial). Confirm the OP is in transfer mode. Verify the COM port or MPI adapter settings in ProTool match the connected interface.

Place the OP in transfer mode manually via the system menu. Use a known-good MPI adapter or serial cable. Ensure the correct interface and baud rate are selected in ProTool before initiating the transfer.

Operator keys are unresponsive or intermittently failing

Inspect the membrane keypad for physical damage, contamination, or wear. Check the internal ribbon cable connection between the keypad and the main board.

Clean the keypad surface with a dry cloth. If individual keys are permanently unresponsive, the membrane keypad assembly requires replacement. Reseat the ribbon cable connector if accessible during repair.

Alarm messages are displayed in incorrect language or with garbled text

The project loaded on the OP may have been compiled with incorrect language settings, or the project transfer may have been incomplete.

Reload the correct project version from SIMATIC ProTool, ensuring the correct language is selected in the project settings before transfer. Perform a complete transfer rather than a partial update.

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