Siemens 6AV6355-1CA47-7CB4 OP 77B

€ 3.495,00

SKU: 6AV6355-1CA47-7CB4 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7CB4 is an OP 77B operator panel belonging to the SIMATIC HMI Basic Panels series. It is a compact, key-operated operator panel designed for straightforward machine-level human-machine interface tasks. This unit provides a monochrome display with a membrane keypad for process visualization and operator control in automation environments.

The OP 77B features a 4-line text display capable of showing alphanumeric characters, supported by a dedicated function key set for direct process interaction. It communicates via MPI and PROFIBUS DP interfaces, enabling seamless integration with SIMATIC S7-200, S7-300, and S7-400 PLCs. The panel is configured using WinCC flexible software and supports alarm management, recipe handling, and trend display functions within its compact form factor.

The OP 77B is commonly deployed in manufacturing, packaging, and process automation applications where a cost-effective, robust operator interface is required at the machine level. Its compact dimensions and panel-mount design make it suitable for integration into control cabinets and machine enclosures. Industries such as food and beverage, automotive assembly, and general factory automation regularly utilize this panel for local operator interaction and status monitoring.

Technical Specifications

Display Type	Monochrome STN LCD
Display Size	4-line text display
Character Display	4 lines x 20 characters
Input/Operating Voltage	24 V DC
Power Consumption	4.5 W (typical)
Communication Interface	MPI, PROFIBUS DP
Configuration Software	WinCC flexible 2005 or higher
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
Certifications	CE, UL, cULus
Series/Product Family	SIMATIC HMI OP 77B

Common Error Codes & System Events

Event ID: 10000: Configuration error detected during startup; the loaded project is incompatible with the panel firmware version.
Reload the project using a compatible version of WinCC flexible and ensure firmware is up to date before transferring.
Event ID: 20000: Communication link to the PLC has been lost or cannot be established on the configured MPI/PROFIBUS DP connection.
Check MPI/PROFIBUS DP cable connections, verify bus address settings, and confirm PLC is powered and in RUN mode.
Event ID: 40000: Tag read error; the panel cannot read the value of a configured PLC tag.
Verify the tag address in WinCC flexible matches the actual PLC data block or memory address. Check PLC program for address conflicts.
Event ID: 50000: Tag write error; the panel cannot write a value to the configured PLC tag.
Check that the target PLC memory area is not write-protected and that the tag address is correctly configured in the project.
Event ID: 60000: Alarm buffer overflow; the number of pending alarms has exceeded the panel buffer capacity.
Acknowledge and clear existing alarms. Review alarm configuration to reduce simultaneous alarm triggers or increase acknowledgement frequency.
Event ID: 70000: Recipe data error; a recipe record could not be read from or written to the panel memory.
Check recipe configuration in WinCC flexible for data type mismatches. Re-transfer the project and verify available panel memory.
Event ID: 80000: System memory low warning; available panel memory for runtime data is critically low.
Reduce the number of active alarms, recipe entries, or trend data points. Consider archiving data to free memory resources.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B panel?

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 S7-200 via the PPI protocol.

What software is required to configure the 6AV6355-1CA47-7CB4?

The panel is configured using Siemens WinCC flexible 2005 or a later version. Projects are transferred to the panel via MPI cable or PROFIBUS DP 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 avoid operational faults.

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 when correctly panel-mounted.

Can the OP 77B display graphical content or images?

No, the OP 77B is a text-based operator panel and does not support graphical or bitmap image display. It is limited to alphanumeric character output across its 4-line display.

Troubleshooting

Display remains blank after power on

Measure 24 V DC at the power supply connector on the rear of the panel. Check for blown internal fuse or wiring fault at the terminal block.

Restore correct 24 V DC supply. If the supply is confirmed correct and the display remains blank, the internal power supply board or display module may require replacement.

Panel cannot establish communication with the PLC

Verify MPI or PROFIBUS DP cable integrity and connector seating. Check that the bus address configured on the panel matches the WinCC flexible project and does not conflict with other nodes.

Replace or reseat the communication cable. Correct the bus address settings in WinCC flexible and re-transfer the project. Confirm the PLC is in RUN mode and the bus termination resistors are correctly set.

Function keys do not respond to presses

Inspect the membrane keypad for physical damage, contamination, or deformation. Test each key in the panel's service or diagnostic mode if available.

Clean the keypad surface. If individual keys are unresponsive due to membrane wear or damage, the keypad membrane assembly should be replaced.

Alarms are displayed but cannot be acknowledged

Check the alarm configuration in WinCC flexible to confirm that acknowledgement is enabled for the affected alarm class. Verify the acknowledgement key assignment on the panel.

Correct the alarm class acknowledgement settings in the WinCC flexible project and re-transfer to the panel. Ensure the correct function key is assigned for alarm acknowledgement.

Project transfer fails or times out

Check the MPI cable connection between the programming device and the panel. Verify the transfer settings in WinCC flexible match the panel communication parameters, including baud rate and MPI address.

Use a known-good Siemens MPI programming cable. Set the panel to transfer mode manually via the panel's start center menu. Confirm baud rate and address settings match in both WinCC flexible and the panel configuration.

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