Siemens 6AV6355-1AA47-7DL7 OP 77B

€ 3.495,00

SKU: 6AV6355-1AA47-7DL7 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1AA47-7DL7 is an operator panel belonging to the SIMATIC HMI OP 77B series, manufactured by Siemens as part of the SIMATIC HMI Basic Panels product line. This unit is a compact, key-operated operator panel designed for machine-level human-machine interface applications, providing alphanumeric display and control functionality. It is intended for use with Siemens SIMATIC S7 PLCs and other compatible controllers via standard communication interfaces.

The OP 77B features a monochrome STN LCD display with a resolution of 160 x 32 pixels, capable of displaying up to 4 lines of text and basic graphics. The panel is equipped with a membrane keypad including function keys, system keys, and alphanumeric input keys, enabling direct operator interaction without a touchscreen. It supports MPI and PROFIBUS DP communication interfaces for integration into SIMATIC automation networks, and is configured using WinCC flexible software. The unit operates on a 24 V DC supply and is rated to IP65 on the front face, making it suitable for panel-mount installations in industrial environments.

The OP 77B is widely used in manufacturing, machine building, and process automation applications where a cost-effective, robust operator interface is required at the machine level. Its compact form factor and keypad-based operation make it suitable for environments where touchscreen panels are impractical, such as in high-vibration or gloved-hand operation scenarios. Typical installations include packaging machinery, conveyor systems, injection molding machines, and general-purpose industrial control panels.

Technical Specifications

Display Type	Monochrome STN LCD
Display Resolution	160 x 32 pixels
Display Lines	4 lines of text
Input/Operating Voltage	24 V DC
Communication Interface	MPI, PROFIBUS DP
IP Rating (Front)	IP65
IP 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 mount
Configuration Software	WinCC flexible
Certifications	CE, UL
Control Type	Membrane keypad (alphanumeric + function keys)

Common Error Codes and System Events

Event ID: 10000: Configuration error: The project loaded on the panel is incompatible or corrupt.
Reload the correct project file using WinCC flexible. Verify the project version matches the panel firmware version.
Event ID: 10001: Communication error: No connection to the configured PLC controller.
Check MPI or PROFIBUS DP cable connections and termination resistors. Verify PLC address settings match the HMI project configuration.
Event ID: 10002: Tag read error: A configured tag cannot be read from the PLC.
Verify the tag address in the WinCC flexible project matches the actual PLC data block or memory address. Check PLC program is running.
Event ID: 10003: Tag write error: A value cannot be written to the configured PLC tag.
Check PLC tag address and data type in the HMI project. Ensure the PLC is in RUN mode and the memory area is not write-protected.
Event ID: 10006: Overflow of alarm buffer: The alarm log buffer is full.
Acknowledge and clear pending alarms. Increase the alarm buffer size in the WinCC flexible project configuration if recurring.
Event ID: 10010: System startup error: Panel failed to complete startup sequence.
Perform a power cycle. If the fault persists, reload the project via WinCC flexible or perform a factory reset using the panel's transfer mode.
Event ID: 10012: Transfer mode active: Panel is waiting for a project download.
Transfer the project from the engineering PC using WinCC flexible, or press ESC to cancel transfer mode and resume normal operation.
Event ID: 10020: Firmware update error: Firmware update process was interrupted or failed.
Restart the firmware update procedure using the ProSave tool. Ensure stable power supply and communication connection during the update process.

Frequently Asked Questions

What communication interfaces does the OP 77B support?

The OP 77B supports MPI and PROFIBUS DP communication interfaces, allowing direct integration with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs.

What software is used to configure the Siemens 6AV6355-1AA47-7DL7?

The panel is configured using Siemens WinCC flexible software. The project is then transferred to the panel via MPI or PROFIBUS DP connection from an engineering PC.

What is the supply voltage for this operator panel?

The OP 77B operates on a 24 V DC supply voltage, which is the standard supply voltage for SIMATIC HMI Basic Panels.

Is the OP 77B suitable for outdoor or washdown environments?

The front face of the panel is rated IP65, providing protection against dust and water jets, making it suitable for panel-mount installations in industrial environments. The rear of the unit is rated IP20 and must be protected accordingly.

Does the OP 77B support touchscreen input?

No, the OP 77B uses a membrane keypad for operator input and does not have a touchscreen. It includes alphanumeric keys, function keys, and system keys for navigation and data entry.

Troubleshooting

Display remains blank after power on

Measure the 24 V DC supply voltage at the panel's power connector. Check for blown internal fuse or wiring fault on the supply line.

Restore correct 24 V DC supply. If supply is confirmed correct and display remains blank, the internal power supply or display backlight may have failed and the unit should be sent for repair or replacement.

Panel shows 'No connection to PLC' or communication error on startup

Check MPI or PROFIBUS DP cable connections, bus termination resistors at both ends of the network, and verify the PLC station address configured in the HMI project matches the actual PLC address.

Correct any wiring faults, ensure proper bus termination is applied, and confirm address settings in WinCC flexible match the PLC configuration. Reload the project if settings were changed.

Panel is stuck in transfer mode and will not start normally

The panel enters transfer mode automatically if no valid project is loaded or if the transfer mode was manually activated. Check if a valid project has been downloaded to the panel.

Transfer a valid WinCC flexible project to the panel using an MPI or PROFIBUS DP connection from the engineering PC. Once the transfer is complete, the panel will restart in normal operating mode.

Function keys do not respond or produce incorrect actions

Check the key assignment configuration in the WinCC flexible project. Inspect the membrane keypad for physical damage or contamination beneath the keypad overlay.

Verify and correct function key assignments in the WinCC flexible project and reload the project to the panel. If the keypad is physically damaged, the panel should be repaired or the keypad membrane replaced.

Alarms are not displayed or acknowledged correctly

Check the alarm configuration in the WinCC flexible project, including alarm class settings, trigger tags, and acknowledgment group assignments. Verify the PLC alarm trigger bits are functioning correctly.

Correct the alarm configuration in WinCC flexible and reload the project. Ensure the PLC program is correctly setting and resetting alarm trigger bits as intended.

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