Siemens 6AV6355-1CA47-7CH0 OP 77B

€ 2.070,40

SKU: 6AV6355-1CA47-7CH0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7CH0 is an operator panel belonging to the OP 77B series, part of the SIMATIC HMI Basic Panels product family manufactured by Siemens. This unit is a compact, key-operated operator panel designed for machine-level human-machine interface applications, providing a straightforward interface for process monitoring and control. It is intended for use in conjunction with Siemens SIMATIC PLCs and integrates into the broader SIMATIC automation environment.

The OP 77B features a monochrome STN LCD display with a resolution of 160 x 80 pixels and a backlit screen for clear readability in various lighting conditions. It supports MPI and PROFIBUS DP communication interfaces, enabling direct connection to SIMATIC S7-200, S7-300, and S7-400 PLCs without the need for additional gateways. The panel is configured using WinCC flexible software and offers function keys for operator input, along with LED indicators for status feedback. It operates on a 24 V DC supply and is rated IP65 on the front face for protection against dust and water ingress.

The OP 77B is widely deployed in manufacturing, process automation, and machine building applications where a cost-effective, reliable operator interface is required at the machine level. It is suitable for industries such as automotive, food and beverage, packaging, and general factory automation. Its compact form factor and robust construction make it appropriate for panel mounting in control cabinets and machine enclosures where space is limited.

Technical Specifications

Display Type	Monochrome STN LCD
Display Resolution	160 x 80 pixels
Display Size	4 inch
Input 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 mounting
Configuration Software	WinCC flexible
PLC Compatibility	SIMATIC S7-200, S7-300, S7-400
Certifications	CE, UL

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 PLC interrupted during operation. The panel lost communication with the controller after an initial successful connection.
Inspect cable integrity and connector seating. Check for electromagnetic interference sources near the communication cable. Verify bus termination is correct at both ends of the network.
Event ID: 20000: Configuration download error. The project data could not be successfully transferred to the panel.
Verify the USB or MPI connection between the engineering PC and the panel. Ensure the WinCC flexible project is compiled without errors before downloading. Check available memory on the panel.
Event ID: 20001: Project data on the panel is corrupted or incompatible with the current firmware version.
Re-download the project using WinCC flexible. If the issue persists, perform a factory reset and update the panel firmware before re-downloading the project.
Event ID: 30000: Panel internal temperature has exceeded the permissible operating range.
Check the ambient temperature around the panel and ensure adequate ventilation. Verify that the panel cutout dimensions and installation clearances comply with the specifications in the operating manual.
Event ID: 40000: Power supply voltage is outside the permissible range. The 24 V DC supply is too low or too high.
Measure the supply voltage at the panel power connector. Ensure the supply is within the specified 24 V DC range (typically 19.2 V to 28.8 V). Check for loose wiring or an undersized power supply unit.
Event ID: 50000: Firmware update failed or firmware is corrupted on the panel.
Repeat the firmware update procedure using the correct firmware version for the OP 77B from the Siemens support portal. Ensure the power supply is stable during the update process.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B (6AV6355-1CA47-7CH0)?

The OP 77B is compatible with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It can also communicate with other SIMATIC controllers that support these protocols.

What software is used to configure the OP 77B?

The OP 77B is configured using Siemens WinCC flexible software. The project is created on an engineering PC and then downloaded to the panel via MPI or USB connection.

What is the supply voltage for the 6AV6355-1CA47-7CH0?

The panel requires a 24 V DC power supply. The permissible voltage range is typically 19.2 V DC to 28.8 V DC.

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 be used with PROFIBUS DP networks?

Yes, the OP 77B supports PROFIBUS DP communication, allowing it to be integrated into existing PROFIBUS networks alongside other SIMATIC devices.

Troubleshooting

Display remains blank after power is applied

Check the 24 V DC supply voltage at the power connector using a multimeter. Verify that the supply is within the specified range and that the wiring polarity is correct.

Correct any wiring faults or replace the power supply if the voltage is out of range. If the supply is correct and the display remains blank, the internal power supply or backlight of the panel may be faulty and the unit may require repair or replacement.

Panel displays a communication error and cannot connect to the PLC

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

Correct any cable faults, ensure proper termination, and verify address settings in the WinCC flexible project. Re-download the project if configuration changes are made.

Touchscreen or function keys are unresponsive

Check whether the panel is in download mode or displaying a system error. Inspect the front membrane keypad for physical damage or contamination.

Restart the panel by cycling the 24 V DC power supply. If keys remain unresponsive, the membrane keypad or internal electronics may be damaged and the unit should be sent for repair.

Project download fails from the engineering PC

Verify the communication cable between the PC and the panel is correctly connected. Check that WinCC flexible reports no compilation errors in the project and that the correct panel type is selected in the project settings.

Resolve any project compilation errors in WinCC flexible, ensure the correct communication interface is selected, and retry the download. If the issue persists, perform a panel reset and attempt the download again.

Panel display shows distorted or unreadable characters

Check the display contrast setting within the panel's operating system menu. Inspect the panel for signs of physical damage to the display area.

Adjust the display contrast using the panel's system settings. If the display remains distorted after adjustment, the LCD module may be faulty and the unit should be inspected for repair.

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