Siemens 6AV6355-1FA00-0DM4 OP 77B

€ 1.111,90

SKU: 6AV6355-1FA00-0DM4 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1FA00-0DM4 is the OP 77B operator panel, part of the SIMATIC HMI Basic Panels product family. This compact operator panel is designed for straightforward machine-level human-machine interface tasks, offering a monochrome display for process visualization and operator control. It is manufactured by Siemens and belongs to the well-established SIMATIC HMI portfolio, which is widely deployed in industrial automation environments.

The OP 77B features a 4-line STN monochrome LCD display with a resolution of 160 x 32 pixels, providing clear text and simple graphic representation of process values. It supports communication via PROFIBUS DP and MPI interfaces, enabling direct integration with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs. The panel is configured using WinCC flexible software and supports up to 200 tags, 50 alarms, and 5 screens. The unit operates on 24 V DC supply and is rated IP65 on the front face for protection against dust and water ingress.

The OP 77B is typically used in machine-level control applications where a compact, cost-effective HMI solution is required. It is suited for industries such as packaging, material handling, food and beverage, and general manufacturing, where operators need to monitor process values and acknowledge alarms without requiring a full graphical color display. Its compact form factor and robust IP65 front protection make it appropriate for installation in control cabinet doors in demanding industrial environments.

Technical Specifications

Display Type	STN monochrome LCD
Display Resolution	160 x 32 pixels
Display Lines	4 lines of text
Input/Operating Voltage	24 V DC
Communication Interface	PROFIBUS DP, MPI
IP/Protection Rating	IP65 (front), IP20 (rear)
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90% (non-condensing)
Configuration Software	WinCC flexible 2008 or higher
Number of Tags	200
Number of Alarms	50
Number of Screens	5
Mounting	Panel mounting
Series/Product Family	SIMATIC HMI Basic Panels / OP 77B

Common Error Codes & System Events

Event ID: 1003: Communication error between the HMI panel and the connected PLC. The connection to the controller has been interrupted or cannot be established.
Check PROFIBUS DP or MPI cable connections and termination resistors. Verify the PLC address settings match the HMI project configuration. Restart both the panel and PLC if necessary.
Event ID: 1004: Timeout error on the communication link. The HMI did not receive a response from the PLC within the expected time frame.
Check network cabling and bus termination. Verify baud rate settings are consistent across all devices on the bus. Reduce bus length or check for cable damage.
Event ID: 10000: System startup error. The panel failed to complete its boot sequence correctly.
Perform a factory reset of the panel. Re-transfer the project using WinCC flexible. If the issue persists, check the 24 V DC power supply for correct voltage level.
Event ID: 10001: Project transfer error. The project data transferred to the panel is corrupt or incompatible with the panel firmware version.
Verify the WinCC flexible project is compiled without errors. Ensure the firmware version on the panel is compatible with the project. Re-transfer the project after recompiling.
Event ID: 20000: Tag read/write error. A configured tag could not be read from or written to the connected controller.
Verify the tag address in the WinCC flexible project matches the actual PLC data block or memory address. Check PLC program for correct data area definitions.
Event ID: 40000: Alarm buffer overflow. The number of pending alarms has exceeded the panel's alarm buffer capacity.
Acknowledge and clear existing alarms on the panel. Review the alarm configuration in WinCC flexible to optimize alarm handling and prioritization.
Communication Error: No communication established with the PLC at startup. The panel displays a communication error message on screen.
Verify the MPI or PROFIBUS address configured in the HMI project matches the PLC station address. Check cable integrity and connector pins for damage or corrosion.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B (6AV6355-1FA00-0DM4)?

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 S7-1200 PLCs in certain configurations using appropriate protocol settings.

What software is used to configure the OP 77B?

The OP 77B is configured using Siemens WinCC flexible 2008 or a compatible version. Projects are compiled and transferred to the panel via a PC adapter or MPI/PROFIBUS connection.

What is the supply voltage for the OP 77B?

The OP 77B operates on a 24 V DC supply voltage. Ensure the power supply is within the specified tolerance range to guarantee reliable operation.

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.

How many process tags and screens does the OP 77B support?

The OP 77B supports up to 200 process tags, 5 screens, and 50 alarms, making it suitable for simple machine-level monitoring and control tasks.

Troubleshooting

Display remains blank after power on

Check the 24 V DC supply voltage at the panel power connector using a multimeter. Verify the supply is within the acceptable voltage tolerance range.

Ensure the 24 V DC supply is stable and correctly wired. If the supply is correct and the display remains blank, the internal power supply or display backlight may be faulty and the unit may require repair or replacement.

Panel shows communication error immediately after startup

Verify the MPI or PROFIBUS DP address set in the WinCC flexible project matches the address configured on the PLC. Check all cable connections and bus termination at both ends of the network.

Correct any address mismatches in the project configuration and re-transfer the project. Replace damaged cables or connectors and ensure bus termination resistors are correctly installed at both ends of the PROFIBUS or MPI network.

Project transfer fails from PC to OP 77B

Check the PC adapter connection and verify the correct COM port or USB adapter is selected in WinCC flexible transfer settings. Confirm the panel is in transfer mode.

Set the panel to transfer mode via the panel's start center menu. Ensure the correct interface and baud rate are selected in WinCC flexible. Try a different PC adapter cable if the issue persists.

Tags display incorrect or frozen values

Check the tag addresses configured in WinCC flexible against the actual PLC data addresses. Monitor the PLC program to confirm the data is being updated correctly.

Correct any tag address mismatches in the WinCC flexible project and re-transfer the updated project to the panel. Verify the PLC program is running and updating the relevant data areas.

Panel repeatedly restarts or reboots unexpectedly

Monitor the 24 V DC supply voltage for instability or voltage drops under load. Check for loose wiring at the power connector.

Stabilize the power supply by ensuring adequate current capacity and secure wiring connections. If the rebooting continues with a stable supply, perform a factory reset and re-transfer the project, or consider returning the unit for repair.

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