Siemens 6AV6355-1CA47-7CK4 OP 77B

€ 1.995,00

SKU: 6AV6355-1CA47-7CK4 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7CK4 is an operator panel belonging to the OP 77B series within the Siemens SIMATIC HMI product family. It is a compact, key-operated panel designed for machine-level human-machine interface applications, providing operators with a straightforward means of monitoring and controlling industrial processes. This unit is part of the SIMATIC HMI Basic Panels generation and is manufactured by Siemens AG.

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 varying ambient light conditions. It supports communication via MPI and PROFIBUS DP interfaces, enabling direct integration with Siemens S7-200, S7-300, and S7-400 PLCs. The panel is configured using Siemens WinCC flexible software and supports a range of function keys for operator input, with no touch functionality, relying instead on membrane keypad operation.

The OP 77B is widely deployed in manufacturing, packaging, and process automation environments where a cost-effective, robust operator interface is required at the machine level. Its compact form factor and compatibility with the SIMATIC controller ecosystem make it suitable for integration into control cabinets and machine panels across industries such as food and beverage, automotive, and general machinery. The panel is particularly suited for applications requiring simple setpoint entry, status display, and alarm acknowledgment.

Technical Specifications

Display Type	Monochrome STN LCD
Display Resolution	160 x 80 pixels
Input/Operating Voltage	24 V DC
Power Consumption	4 W (typical)
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
Configuration Software	WinCC flexible 2008 or later
Series/Product Family	SIMATIC HMI OP 77B
Certifications	CE, UL
Input Method	Membrane keypad (no touch)

Common Error Codes & System Events

Event ID: 1000: Communication error between the HMI panel and the connected PLC. The panel cannot establish or maintain a connection.
Check MPI or PROFIBUS DP cable connections and termination resistors. Verify the PLC address settings match the HMI project configuration. Ensure the PLC is powered and in RUN mode.
Event ID: 1003: Connection to the configured PLC has been lost during operation.
Inspect the communication cable for damage or loose connectors. Check the bus termination and cable shielding. Restart both the HMI panel and the PLC if the connection is not restored automatically.
Event ID: 10000: System startup error. The panel failed to complete its boot sequence correctly.
Perform a factory reset via the panel's loader menu. Re-transfer the project using WinCC flexible. If the issue persists, check the internal power supply and consider hardware replacement.
Event ID: 10001: Project transfer error. The project file could not be loaded or is incompatible with the panel firmware version.
Verify the WinCC flexible project version is compatible with the panel firmware. Update the panel firmware if necessary and re-transfer the project.
Event ID: 20000: Alarm buffer overflow. The number of pending alarms has exceeded the panel's buffer capacity.
Acknowledge and clear existing alarms. Review the alarm configuration in WinCC flexible to reduce unnecessary alarm generation or increase the acknowledgment frequency.
Event ID: 40000: Tag read/write error. A configured tag could not be read from or written to the PLC.
Verify the tag address in the WinCC flexible project matches the actual PLC memory address. Check PLC program for address conflicts and ensure the data block or memory area is accessible.
Event ID: 50000: Backlight failure or display error detected.
Check the operating voltage supply to the panel. If the backlight has failed due to age, the panel display unit may require replacement or the unit should be sent for repair.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B (6AV6355-1CA47-7CK4)?

The OP 77B is compatible with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP communication interfaces. It can also communicate with S7-1200 PLCs using appropriate protocol settings in WinCC flexible.

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

The OP 77B is configured using Siemens WinCC flexible 2008 or a compatible version. Projects are transferred to the panel via a PC adapter cable connected to the MPI interface.

What is the supply voltage for the 6AV6355-1CA47-7CK4?

The panel operates on a 24 V DC supply voltage. Ensure the power supply is stable and within the specified tolerance range to prevent communication or display errors.

Does the OP 77B support touch input?

No, the OP 77B does not support touch input. Operator interaction is performed exclusively via the integrated membrane keypad and function keys.

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 resistant to dust ingress and low-pressure water jets, suitable for installation in industrial environments.

Troubleshooting

Display remains blank after power on

Measure the 24 V DC supply voltage at the power connector. Check whether the panel LEDs or backlight show any activity. Determine if the panel is booting but the backlight has failed, or if there is no power at all.

Verify and restore the 24 V DC supply if absent. If the supply is correct but the display remains blank, the backlight or display module may have failed and the unit should be repaired or replaced.

HMI panel shows 'No connection to PLC' message

Check the MPI or PROFIBUS DP cable between the panel and the PLC. Verify bus termination at both ends of the cable. Confirm the PLC station address in the HMI project matches the physical PLC configuration.

Replace or reseat the communication cable. Correct any address mismatches in the WinCC flexible project and re-transfer. Ensure bus termination resistors are correctly installed at cable ends.

Panel repeatedly restarts or fails to load the project

Attempt to access the panel's loader menu during startup by pressing the appropriate key combination. Check whether the internal flash memory is accessible and whether the project file is intact.

Perform a factory reset from the loader menu and re-transfer the project from WinCC flexible. If the panel continues to restart, the internal memory or power supply board may be faulty and require hardware repair.

Function keys do not respond to operator input

Check whether the panel is in transfer mode or loader mode, which disables normal operation. Inspect the membrane keypad for physical damage or contamination beneath the keys.

Exit transfer or loader mode and return the panel to runtime mode. If keys remain unresponsive, the membrane keypad assembly may need replacement.

Alarms are not displayed or acknowledged on the panel

Verify the alarm configuration in the WinCC flexible project, including the correct PLC tag addresses linked to alarm triggers. Check that the PLC program is setting the alarm bits as expected.

Correct any tag address mismatches in the alarm configuration and re-transfer the project. Confirm the PLC logic is functioning correctly by monitoring the relevant memory addresses in the PLC programming software.

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