Siemens 6AV6355-1CA31-8DM5 OP 77B

€ 2.495,00

SKU: 6AV6355-1CA31-8DM5 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA31-8DM5 is an operator panel belonging to the OP 77B series within the Siemens SIMATIC HMI product family. This compact panel is designed for machine-level human-machine interface applications, providing operators with a straightforward means of monitoring and controlling industrial processes. It is a key component in Siemens' range of Basic Panels, intended for use with SIMATIC S7 PLCs and similar controllers.

The OP 77B features a monochrome STN LCD display and a membrane keypad for operator input, offering a robust and reliable interface without the complexity of a full touchscreen. It supports MPI and PROFIBUS DP communication interfaces, enabling direct integration with SIMATIC S7-200, S7-300, and S7-400 PLCs. The panel is configured using WinCC flexible software and provides functionality including alarm management, recipe handling, and trend displays within its onboard memory capacity.

The OP 77B is widely deployed in manufacturing, packaging, and process automation environments where a cost-effective, durable operator interface is required at the machine level. Its compact form factor and panel-mount design make it suitable for integration into control cabinets and machine front panels across industries such as food and beverage, automotive, and general factory automation. The device is well-suited for applications requiring reliable local operator control without the need for advanced graphical capabilities.

Technical Specifications

Display Type	Monochrome STN LCD
Display Size	4 inches
Display Colors	Monochrome (blue/white)
Input Voltage	24 V DC
Power Consumption	Approx. 4 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 Rating (Front)	IP65
IP Rating (Rear)	IP20
Mounting	Panel mounting
Configuration Software	WinCC flexible 2005 or higher
Certifications	CE, UL, cULus

Common Error Codes & System Events

Event ID: 10000: Configuration error detected on the panel, typically caused by an incompatible or corrupted project file.
Reload the project using WinCC flexible. Ensure the project version is compatible with the panel firmware version.
Event ID: 20000: Communication error between the HMI panel and the connected PLC. The connection to the controller has been lost or cannot be established.
Check MPI or PROFIBUS DP cable connections and termination resistors. Verify PLC address settings match the HMI project configuration.
Event ID: 40000: System memory low warning. The panel's available memory for runtime operation is critically low.
Reduce the number of active alarms, recipes, or trend buffers in the project. Transfer an optimized project to the panel.
Event ID: 50000: Firmware update error. The firmware transfer to the panel was interrupted or failed.
Repeat the firmware update procedure using the correct firmware version via the MPI interface or memory card. Ensure stable power supply during update.
Event ID: 60000: Tag read/write error. The HMI panel cannot read from or write to a configured PLC tag.
Verify PLC tag addresses in the WinCC flexible project. Check that the PLC program is running and the relevant data blocks or memory areas are accessible.
Event ID: 70000: Panel operating system error or internal watchdog timeout, causing an unexpected restart.
Check for power supply fluctuations. If the error persists after restart, perform a factory reset and reload the project. Contact Siemens support if the fault recurs.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B (6AV6355-1CA31-8DM5)?

The OP 77B is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It can also communicate with certain third-party controllers supported by WinCC flexible drivers.

What software is used to configure the OP 77B?

The OP 77B is configured using Siemens WinCC flexible 2005 or a later version. Projects are created on a PC and transferred to the panel via MPI cable or memory card.

What is the supply voltage for the 6AV6355-1CA31-8DM5?

The panel requires a 24 V DC power supply. Ensure the supply is within the specified tolerance range to guarantee reliable operation.

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 installation in environments where dust and water spray may be present.

Can the OP 77B handle alarm and recipe management?

Yes, the OP 77B supports alarm logging, alarm management, and recipe handling as part of its standard runtime functionality within the limits of its onboard memory.

Troubleshooting

Display remains blank after power on

Check the 24 V DC supply voltage at the power connector. Verify that the supply is within the specified range and that the connector is firmly seated.

Restore correct supply voltage. If the display remains blank with correct voltage present, the internal power supply or backlight may be faulty and the unit should be sent for repair or replacement.

HMI panel shows 'No connection to PLC' or communication error on startup

Inspect the MPI or PROFIBUS DP cable for damage or loose connections. Verify bus termination is correctly applied at both ends of the network. Check that the PLC address configured in the HMI project matches the actual PLC station address.

Replace or reseat the communication cable. Correct bus termination. Update the HMI project address settings in WinCC flexible and retransfer the project to the panel.

Panel repeatedly restarts or freezes during operation

Check for unstable or noisy 24 V DC power supply. Inspect for electromagnetic interference sources near the panel. Review the project for memory overload conditions.

Install a regulated, filtered 24 V DC power supply. Add appropriate EMC shielding or cable routing. Optimize the WinCC flexible project to reduce memory usage and retransfer to the panel.

Keypad buttons are unresponsive or intermittently fail

Inspect the membrane keypad for physical damage, contamination, or wear. Check the internal ribbon cable connection between the keypad and the main board.

Clean the keypad surface if contaminated. If the ribbon cable is loose, reseat it carefully. If the keypad membrane is damaged, replace the keypad assembly or the entire panel.

Project transfer fails or times out during download from WinCC flexible

Verify the MPI cable is correctly connected and the correct COM port and transfer speed are selected in WinCC flexible. Ensure the panel is in transfer mode.

Place the panel in transfer mode via the Start Center menu. Select the correct interface settings in WinCC flexible. Try a lower transfer baud rate if errors persist. Replace the MPI cable if communication remains unreliable.

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