Siemens 6AV6355-1AA47-7CB2 OP 77B

€ 3.495,00

SKU: 6AV6355-1AA47-7CB2 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1AA47-7CB2 is an operator panel belonging to the OP 77B series within the Siemens SIMATIC HMI product family. This compact panel operator unit is designed for machine-level human-machine interface applications, providing a text-based display for process visualization and operator control. It is a key component in Siemens' range of basic HMI devices, intended for straightforward monitoring and control tasks in industrial environments.

The OP 77B features a multi-line text display capable of showing alphanumeric characters, function keys, and system messages, enabling operators to interact with connected controllers efficiently. It supports MPI and PROFIBUS DP communication interfaces for direct integration with Siemens S7-200, S7-300, and S7-400 PLCs. The unit operates on a 24 V DC supply and is built to withstand industrial conditions, with a front panel protection rating of IP65, making it resistant to dust and water ingress from the front.

The OP 77B is widely deployed in manufacturing, packaging, and process automation environments where a cost-effective, reliable operator interface is required at the machine level. Its compact form factor makes it suitable for installation in control cabinets and machine panels with limited space. Industries such as food and beverage, automotive assembly, and general factory automation commonly use this panel for local operator interaction with PLC-controlled machinery.

Technical Specifications

Display Type	STN LCD, text-based
Display Lines	4 lines
Characters per Line	20 characters
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
Certifications	CE, UL
Series/Product Family	SIMATIC HMI OP 77B

Common Error Codes & System Events

Event ID: 10000: Communication error between the HMI panel and the connected PLC. The connection to the controller has been interrupted or cannot be established.
Check MPI/PROFIBUS DP cable connections and termination resistors. Verify the PLC is powered and running. Confirm the station address and baud rate settings match on both devices.
Event ID: 10001: Timeout error on the communication link. The HMI did not receive a response from the PLC within the expected time frame.
Check network cabling for damage or loose connectors. Verify PLC program is not in a halted state. Reduce network load or increase the communication timeout setting in the HMI configuration.
Event ID: 20000: Configuration error detected. The project loaded on the HMI panel is incompatible with the connected controller or the panel hardware.
Reload the correct project using Siemens ProTool or WinCC flexible. Ensure the PLC type and address configured in the project match the actual hardware.
Event ID: 40000: Internal device error. A hardware fault has been detected within the HMI panel.
Cycle power to the panel. If the error persists, perform a factory reset. If the fault remains, the unit may require repair or replacement.
Event ID: 50000: Memory error. The panel has detected a fault in its internal memory or the project data is corrupted.
Re-transfer the project to the panel using ProTool or WinCC flexible. If the error persists, perform a memory reset and re-download the project.
Event ID: 60000: Tag update error. One or more process tags cannot be read from or written to the connected PLC.
Verify the PLC data block addresses referenced in the HMI project exist and are accessible. Check PLC program for address conflicts or protected memory areas.

Frequently Asked Questions

Which PLCs are compatible with the Siemens 6AV6355-1AA47-7CB2 OP 77B?

The OP 77B is compatible with Siemens S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It can also be connected to Siemens S5 controllers using appropriate adapters.

What software is used to configure and program the OP 77B?

The OP 77B is configured using Siemens ProTool or WinCC flexible engineering software. Projects are transferred to the panel via the MPI interface or a PC adapter cable.

What is the supply voltage for the 6AV6355-1AA47-7CB2?

The panel operates on a 24 V DC supply voltage, which is standard for Siemens SIMATIC HMI devices in this class.

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 environments where dust and water spray may be present.

Can the OP 77B display graphics or only text?

The OP 77B is a text-based operator panel and does not support graphical displays. It is capable of displaying alphanumeric characters, function key labels, and system messages on its multi-line LCD screen.

Troubleshooting

Display remains blank after power on

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

Ensure the 24 V DC supply is within tolerance. If supply voltage is correct and the display remains blank, the internal power supply or display unit may be faulty and the panel should be sent for repair.

HMI shows communication error or 'No connection to PLC' message

Verify the MPI or PROFIBUS DP cable is securely connected at both the HMI and PLC ends. Check that bus termination resistors are correctly installed at both ends of the network segment.

Replace or reseat the communication cable. Confirm that the station address and baud rate in the HMI project match the PLC configuration. Ensure the PLC is in RUN mode and the network is not overloaded.

Project transfer from PC to OP 77B fails

Check the PC adapter cable connection to the MPI port on the panel. Verify the correct COM port and transfer settings are selected in ProTool or WinCC flexible.

Try a different PC adapter cable or USB-to-MPI adapter. Ensure the panel is in transfer mode before initiating the download. Confirm the engineering software version is compatible with the panel firmware version.

Function keys do not respond or produce incorrect actions

Check the project configuration in ProTool or WinCC flexible to verify that function key assignments are correctly defined. Inspect the keypad membrane for physical damage or contamination.

Re-transfer the project to the panel to rule out configuration corruption. If keys are physically damaged, the keypad membrane or front panel assembly may need to be replaced.

Panel repeatedly restarts or enters a boot loop

This may indicate corrupted firmware or project data on the panel. Check if the panel displays any error message during the boot sequence before restarting.

Perform a factory reset by holding the appropriate key combination during power-on as described in the OP 77B operating instructions. Re-transfer the firmware and project using WinCC flexible or ProTool after the reset.

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