Siemens 6AV6355-1GA00-0DL7 OP 77B

€ 1.502,32

SKU: 6AV6355-1GA00-0DL7 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1GA00-0DL7 is the OP 77B operator panel, part of the SIMATIC HMI Basic Panels product family from Siemens. This compact operator panel is designed for straightforward machine-level human-machine interface tasks, providing operators with a text-based display for monitoring and controlling industrial processes. It belongs to the generation of SIMATIC HMI panels that bridge the gap between simple pushbutton panels and full graphical touchscreen interfaces.

The OP 77B features a 4-line text display capable of showing alphanumeric characters, along with a membrane keypad for operator input including function keys and navigation keys. It communicates via MPI and PROFIBUS DP interfaces, enabling direct integration with Siemens S7-200, S7-300, and S7-400 PLCs without requiring an additional communication module. Configuration is performed using WinCC flexible Compact or Standard software, and the panel supports alarm management, recipe handling, and simple process value display.

The OP 77B is widely used in manufacturing machinery, conveyor systems, packaging equipment, and general-purpose industrial automation where a cost-effective, robust operator interface is required. Its compact form factor and membrane keypad make it suitable for environments where a touchscreen is not practical, such as applications with gloved operators or high-vibration conditions. The panel is commonly found in automotive assembly lines, food and beverage processing, and material handling systems.

Technical Specifications

Display Type	STN LCD, 4-line text display
Display Characters	4 lines x 20 characters
Input/Operating Voltage	24 V DC
Power Consumption	Max. 5 W
Communication Interface	MPI, PROFIBUS DP
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90%, non-condensing
IP Protection Rating	IP65 (front), IP20 (rear)
Mounting	Panel mounting
Certifications	CE, UL, cULus
Series/Product Family	SIMATIC HMI OP 77B
Configuration Software	WinCC flexible Compact / Standard

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 configured controller.
Check MPI or PROFIBUS DP cable connections and termination resistors. Verify the PLC address settings match the 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 bus termination at both ends of the PROFIBUS or MPI network. Restart the panel and PLC if the connection is not automatically restored.
Event ID: 20000: Configuration download error. The project data could not be transferred to the panel successfully.
Verify the transfer cable is correctly connected. Ensure the panel is in transfer mode before initiating the download. Check that the WinCC flexible project is compatible with the OP 77B firmware version.
Event ID: 40000: System memory low or project data exceeds available panel memory.
Reduce the size of the WinCC flexible project by removing unused tags, alarms, or recipes. Re-download the optimized project to the panel.
Event ID: 50000: Firmware version mismatch between the panel and the WinCC flexible project.
Update the panel firmware using the ProSave tool or WinCC flexible to match the version required by the project. Re-download the project after updating.
Event ID: 60000: Tag read/write error. A configured tag could not be read from or written to the PLC.
Verify the tag address in WinCC flexible matches the actual PLC data block or memory area. Check that the PLC program has the correct data types and address ranges configured.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B?

The OP 77B is compatible with Siemens S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP. It can also communicate with SIMATIC S5 controllers using appropriate protocol settings.

What software is used to configure the OP 77B?

The OP 77B is configured using Siemens WinCC flexible Compact or WinCC flexible Standard software. Projects are downloaded to the panel via a PC adapter cable connected to the MPI interface.

What is the supply voltage for the OP 77B?

The OP 77B operates on 24 V DC. This is typically supplied from a standard SITOP or equivalent 24 V DC power supply unit.

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

The front panel of the OP 77B carries an IP65 protection rating, making it suitable for panel-mount installations where dust and water spray may be present.

Can the OP 77B display graphical content?

No, the OP 77B is a text-based operator panel and does not support graphical displays or bitmap images. It is limited to alphanumeric character display across 4 lines of 20 characters each.

Troubleshooting

Display remains blank after power on

Check that 24 V DC is present at the power supply terminals of the panel using a multimeter. Inspect the supply cable and connector for damage or loose connections.

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

Panel cannot communicate with the PLC

Verify the MPI or PROFIBUS DP address configured in WinCC flexible matches the address set on the PLC. Check the bus cable for correct wiring, termination resistors at both ends, and no short circuits.

Correct any address mismatches in the WinCC flexible project and re-download. Replace damaged cables and ensure proper bus termination. Confirm the PLC is powered and in RUN or STOP mode as required.

Project download fails or transfer does not start

Confirm the panel is set to transfer mode by navigating to the system menu. Check the PC adapter cable connection between the programming device and the panel MPI port.

Place the panel in transfer mode before initiating the download from WinCC flexible. Replace the PC adapter cable if communication is not established. Ensure the correct COM port or USB adapter is selected in the transfer settings.

Alarm messages are not appearing on the panel

Check that alarm tags are correctly configured in WinCC flexible and that the corresponding PLC bit addresses are correct. Verify the PLC program is setting the alarm bits as expected.

Correct any tag address mismatches in the WinCC flexible alarm configuration. Re-download the project and test by manually triggering the alarm condition in the PLC program.

Panel keypad buttons are unresponsive

Check for physical damage to the membrane keypad. Attempt a panel restart by cycling the 24 V DC power supply. Verify the project configuration has the function keys correctly assigned.

If a restart does not restore keypad functionality, the membrane keypad assembly may be worn or damaged and requires replacement. Ensure the WinCC flexible project has the correct key assignments configured before replacing hardware.

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