Siemens 6AV6355-1AA47-7DC6 OP 77B

€ 1.995,00

SKU: 6AV6355-1AA47-7DC6 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1AA47-7DC6 is an operator panel belonging to the OP 77B series, part of the SIMATIC HMI Basic Panels product family manufactured by Siemens. This unit functions as a compact human-machine interface device designed for machine-level operator control and monitoring tasks. It provides a monochrome display with keypad-based navigation, making it suitable for straightforward process visualization and parameter input in industrial environments.

The OP 77B features a 4-inch STN monochrome LCD display and supports communication via MPI, PROFIBUS DP, and RS-422/RS-485 interfaces, enabling integration with SIMATIC S7 PLCs and other compatible controllers. The panel is configured using Siemens WinCC flexible software, which allows the creation of screens, alarms, recipes, and trend displays. It operates on a 24 V DC supply and is rated IP65 on the front face, providing protection against dust and water ingress in demanding installation environments.

The OP 77B is widely deployed in manufacturing, packaging, and process automation applications where a cost-effective, robust operator interface is required at the machine level. Its compatibility with the SIMATIC S7-200, S7-300, and S7-400 controller families makes it a versatile choice for both new installations and system upgrades. The panel is commonly found in conveyor systems, pumping stations, and general-purpose machine control cabinets.

Technical Specifications

Display Size	4 inch
Display Type	STN monochrome LCD
Display Colors	Monochrome (blue/white)
Input/Operating Voltage	24 V DC
Communication Interface	MPI, PROFIBUS DP, RS-422/RS-485
IP/Protection Rating	IP65 (front), IP20 (rear)
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10 % to 90 % (non-condensing)
Configuration Software	WinCC flexible 2008 or higher
Mounting	Panel mounting
Series/Product Family	SIMATIC HMI OP 77B
Certifications	CE, UL, cULus

Common Error Codes and System Events

Event ID: 10000: Communication error between the HMI panel and the connected PLC. The connection to the controller has been lost or cannot be established.
Check MPI/PROFIBUS cable connections and termination resistors. Verify the PLC address settings match the HMI project configuration. Restart both the PLC and HMI panel.
Event ID: 10001: Connection to the PLC was interrupted during runtime operation.
Inspect the communication cable for damage. Confirm the PLC is in RUN mode and the network address is correctly configured in the WinCC flexible project.
Event ID: 20000: Configuration error detected. The project loaded on the panel is incompatible with the current firmware version.
Reload the project using a compatible version of WinCC flexible. Update the panel firmware if necessary using ProSave or WinCC flexible.
Event ID: 40000: Operating system error or internal system fault detected on the HMI panel.
Perform a panel restart. If the fault persists, perform a factory reset and reload the project. Check for hardware damage if the issue recurs.
Event ID: 50000: Alarm buffer overflow. The number of pending alarms has exceeded the buffer capacity.
Acknowledge and clear existing alarms. Review the alarm configuration in WinCC flexible to reduce unnecessary alarm triggers or increase the buffer size.
Event ID: 70000: Data record or recipe transfer error. A read or write operation to the recipe memory failed.
Check available memory on the panel. Verify the recipe configuration in the WinCC flexible project and retry the transfer operation.
Event ID: 110000: Tag update error. A configured tag could not be read from or written to the PLC.
Verify the tag address in the WinCC flexible project matches the actual PLC memory address. Check communication link integrity and PLC program status.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B panel?

The OP 77B is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It also supports communication with S7-1200 controllers using appropriate configuration in WinCC flexible.

What software is used to configure the 6AV6355-1AA47-7DC6?

The panel is configured using Siemens WinCC flexible 2008 or a compatible version. Projects are transferred to the panel via MPI, PROFIBUS, or a USB/serial connection using the ProSave utility.

What is the supply voltage for this HMI panel?

The OP 77B operates on a 24 V DC supply voltage. Ensure the power source is stable and within the specified tolerance range to prevent communication or display faults.

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

The front face of the OP 77B is rated IP65, providing protection against dust ingress and low-pressure water jets. The rear of the unit is rated IP20.

Can the OP 77B display graphical elements and trend curves?

The OP 77B supports basic graphical elements, bar graphs, and trend displays within the constraints of its monochrome LCD. These are configured using WinCC flexible and are subject to the display resolution limitations of the panel.

Troubleshooting

Display remains blank after power on

Measure the 24 V DC supply voltage at the power connector on the rear of the panel. Check for blown internal fuses and inspect the power supply wiring for loose connections.

Restore the 24 V DC supply to within specification. Replace any blown fuses with the correct rating. If the display remains blank with correct supply voltage, the internal power supply board or display unit may require replacement.

No communication with the PLC after startup

Verify the MPI or PROFIBUS cable is correctly connected and terminated at both ends. Check that the PLC station address configured in the WinCC flexible project matches the actual PLC address setting.

Replace or reseat the communication cable. Correct any address mismatches in the WinCC flexible project and reload the project to the panel. Ensure termination resistors are installed at both ends of the PROFIBUS segment.

Panel displays 'Offline' or connection lost alarm during operation

Check the communication cable for intermittent contact or physical damage. Monitor the PROFIBUS or MPI network for address conflicts or excessive noise.

Replace damaged cables and ensure all connectors are firmly seated. Add cable shielding or ferrite cores if electrical noise is suspected. Verify no duplicate station addresses exist on the network.

Project transfer fails when loading from WinCC flexible

Confirm the WinCC flexible version is compatible with the panel firmware version. Check the transfer cable connection and verify the panel is set to transfer mode.

Update the panel firmware using ProSave if a version mismatch exists. Switch the panel to transfer mode via the Start Center menu before initiating the download. Try an alternative transfer cable if the connection is unreliable.

Keypad buttons are unresponsive or intermittently fail

Inspect the keypad membrane for physical damage, contamination, or wear. Check for any internal connector issues between the keypad membrane and the main board.

Clean the keypad surface with a dry cloth. If individual keys are permanently unresponsive, the keypad membrane assembly will require replacement. Reseat the internal ribbon connector if accessible during servicing.

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