Siemens 6AV6355-3DA00-0BF2 OP 77B

€ 911,00

SKU: 6AV6355-3DA00-0BF2 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-3DA00-0BF2 is an operator panel belonging to the SIMATIC HMI OP 77B series, manufactured by Siemens. It is a compact, key-operated panel designed for machine-level human-machine interface applications, providing operators with a straightforward means of monitoring and controlling automated processes. This unit is part of the SIMATIC HMI Basic Panels generation and is intended for use with Siemens SIMATIC S7 PLCs and other compatible controllers.

The OP 77B features a monochrome LCD display with a resolution of 160 x 80 pixels and a backlit screen for clear readability in various lighting conditions. It supports communication via MPI and PROFIBUS-DP interfaces, enabling direct integration into Siemens automation networks. The panel is configured using WinCC flexible software and supports a range of function keys for direct operator input without requiring a touchscreen. The unit operates on a 24 V DC supply and is rated to IP65 on the front face, providing protection against dust and water ingress in industrial environments.

The OP 77B is widely deployed in manufacturing, machine building, and process automation applications where a compact, robust, and cost-effective operator interface is required. It is particularly suited for integration into control cabinets and machine panels where space is limited and basic process visualization and parameter entry are the primary requirements. Industries such as automotive, food and beverage, packaging, and general factory automation commonly use this panel for local machine control tasks.

Technical Specifications

Display Type	Monochrome LCD with backlight
Display Resolution	160 x 80 pixels
Number of Lines	4 lines of text
Input/Operating Voltage	24 V DC
Power Consumption	Max. 4.5 W
Communication Interface	MPI, PROFIBUS-DP
IP Protection Rating (Front)	IP65
IP Protection Rating (Rear)	IP20
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90%, non-condensing
Mounting	Panel mounting
Configuration Software	WinCC flexible 2005 or higher
Certifications	CE, UL, cULus

Common Error Codes and System Events

Event ID: 10000: Communication error between the OP 77B and the connected PLC. The panel cannot establish or maintain a connection to the controller.
Check MPI or PROFIBUS-DP cable connections and termination resistors. Verify the PLC address settings match the panel configuration in WinCC flexible. Ensure the PLC is powered and in RUN mode.
Event ID: 10001: Connection to the PLC was interrupted during operation.
Inspect the communication cable for damage or loose connectors. Check network topology and bus termination. Restart the panel and PLC if the connection is not restored automatically.
Event ID: 20000: Configuration or project download error. The project loaded on the panel is incompatible or corrupt.
Re-download the project from WinCC flexible to the panel. Verify the WinCC flexible version is compatible with the panel firmware version.
Event ID: 40000: System memory low or memory overflow on the panel.
Reduce the number of active alarms or data records stored on the device. Simplify the project if memory usage is consistently high.
Event ID: 50000: Internal device error or hardware fault detected.
Perform a panel restart. If the fault persists, check the 24 V DC supply voltage for stability. Contact Siemens technical support or arrange for repair if the error recurs.
Event ID: 60000: Alarm buffer overflow. The number of pending alarms exceeds the panel's alarm buffer capacity.
Acknowledge and clear existing alarms. Review the alarm configuration in WinCC flexible to reduce the frequency or number of simultaneously active alarms.

Frequently Asked Questions

What communication interfaces does the OP 77B (6AV6355-3DA00-0BF2) support?

The OP 77B supports MPI and PROFIBUS-DP communication interfaces, allowing direct connection to Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs as well as other PROFIBUS-compatible controllers.

What software is required to configure the OP 77B?

The OP 77B is configured using Siemens WinCC flexible 2005 or a later version. Projects are created on a PC and downloaded to the panel via the MPI or PROFIBUS-DP interface.

What is the supply voltage for the 6AV6355-3DA00-0BF2?

The panel requires a 24 V DC supply voltage for operation.

What is the front panel protection rating of the OP 77B?

The front face of the OP 77B is rated to IP65, providing protection against dust and low-pressure water jets, making it suitable for installation in industrial machine panels.

Can the OP 77B be used with S7-1200 or S7-1500 PLCs?

The OP 77B is primarily designed for use with S7-200, S7-300, and S7-400 PLCs via MPI and PROFIBUS-DP. Compatibility with S7-1200 and S7-1500 is limited, as those controllers are optimized for use with TIA Portal-based HMI panels such as the Basic Panels KTP series.

Troubleshooting

Display remains blank after power on

Check that the 24 V DC supply voltage is present and within tolerance at the panel power connector. Measure the supply with a multimeter to confirm stable voltage.

Ensure the power supply is rated for at least 4.5 W and is functioning correctly. Replace the power supply if voltage is absent or unstable. If supply is confirmed good, the internal backlight or power board may require repair or replacement.

Panel cannot communicate with the PLC

Verify the MPI or PROFIBUS-DP cable is correctly connected and that bus termination resistors are properly set at both ends of the network. Check that the PLC address configured in WinCC flexible matches the actual PLC station address.

Replace or reseat the communication cable. Correct any address mismatches in the WinCC flexible project and re-download to the panel. Ensure no duplicate station addresses exist on the bus.

Project download from WinCC flexible fails

Confirm the WinCC flexible version is compatible with the panel firmware. Check the communication cable between the PC and the panel, and verify the correct interface and baud rate are selected in the transfer settings.

Update WinCC flexible to a compatible version if necessary. Use a known-good MPI or PROFIBUS cable for the download. Reset the panel to transfer mode manually if it does not respond to the download request.

Function keys do not respond or produce incorrect actions

Check the project configuration in WinCC flexible to confirm that the function keys are correctly assigned. Inspect the keypad membrane for physical damage or contamination.

Re-download the project with corrected key assignments. If the keypad membrane is damaged, arrange for panel repair or replacement of the keypad assembly.

Alarm messages are not displayed or are missing

Check the alarm configuration in WinCC flexible to ensure alarm tags are correctly linked to PLC data addresses. Verify the PLC is writing the expected values to the alarm trigger bits.

Correct any misconfigured alarm tag addresses in the project and re-download. Confirm PLC logic is functioning correctly and setting the appropriate alarm bits when fault conditions occur.

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