Siemens 6AV6355-1CA47-7CA0 OP 77B

€ 1.025,73

SKU: 6AV6355-1CA47-7CA0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7CA0 is an operator panel belonging to the OP 77B series, part of the SIMATIC HMI Basic Panels product family manufactured by Siemens. This compact operator panel is designed for machine-level human-machine interface applications, providing a straightforward and reliable interface for monitoring and controlling industrial processes. It is a key component in Siemens' range of entry-level HMI devices, offering essential visualization and control functionality in a robust housing.

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 key-based operation with dedicated function keys and system keys, eliminating the need for a touchscreen while maintaining intuitive navigation. The panel communicates via MPI and PROFIBUS DP interfaces, enabling seamless integration with Siemens S7-200, S7-300, and S7-400 PLCs. Configuration is performed using Siemens WinCC flexible software, and the unit operates on a 24 V DC supply voltage.

The OP 77B is widely used in manufacturing, packaging, material handling, and process automation applications where a cost-effective, reliable operator interface is required at the machine level. Its compact form factor and keypad-based operation make it suitable for installation in control cabinets and machine panels with limited space. The panel is particularly well-suited for environments where a simple, durable HMI solution is preferred over more complex touchscreen alternatives.

Technical Specifications

Display Type	Monochrome STN LCD
Display Resolution	160 x 80 pixels
Display Size	4 inch
Operation Type	Keypad (non-touch)
Input Voltage	24 V DC
Voltage Tolerance	19.2 V DC to 28.8 V DC
Communication Interface	MPI, PROFIBUS DP
Configuration Software	WinCC flexible 2005 or higher
PLC Compatibility	SIMATIC S7-200, S7-300, S7-400
Operating Temperature	0 °C to 50 °C
Storage Temperature	-20 °C to 60 °C
IP Rating (Front)	IP65
IP Rating (Rear)	IP20
Mounting	Panel mounting
Certifications	CE, UL, cULus

Common Error Codes & System Events

Event ID: 1003: Communication error between the HMI panel and the connected PLC. The configured connection cannot be established or has been interrupted.
Check MPI or PROFIBUS DP cable connections and termination resistors. Verify PLC address settings and ensure the PLC is powered and running. Check baud rate configuration in WinCC flexible project.
Event ID: 1004: Connection to the PLC was interrupted during operation.
Inspect communication cables for damage or loose connections. Verify the PLC is operational and the network address has not changed. Restart the HMI panel after resolving the connection issue.
Event ID: 10000: System startup event indicating the HMI runtime has started successfully.
No action required. This is an informational event logged at panel startup.
Event ID: 10001: Project download completed. A new project has been successfully transferred to the panel.
No action required. Verify the correct project version is loaded and the panel operates as expected after download.
Event ID: 20000: Tag read error. The HMI panel is unable to read a configured tag from the PLC.
Check that the tag address configured in WinCC flexible matches the actual PLC data block or memory address. Verify PLC program is running and the relevant data areas are accessible.
Event ID: 20001: Tag write error. The HMI panel failed to write a value to the configured PLC tag.
Ensure the PLC is in RUN mode and the target memory area is not write-protected. Check tag address configuration in the WinCC flexible project for correctness.
Event ID: 40000: Internal device error or hardware fault detected on the operator panel.
Perform a power cycle of the panel. If the error persists, check the 24 V DC supply voltage at the panel connector. Contact Siemens technical support or arrange for panel repair if the fault continues.

Frequently Asked Questions

Which PLCs are compatible with the Siemens OP 77B (6AV6355-1CA47-7CA0)?

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 Siemens controllers supported by WinCC flexible.

What software is used to configure the OP 77B panel?

The OP 77B is configured using Siemens WinCC flexible 2005 or a later version. Projects are created on a PC and downloaded to the panel via an MPI or PROFIBUS DP connection.

What is the supply voltage for the 6AV6355-1CA47-7CA0?

The panel requires a 24 V DC supply voltage with an acceptable range of 19.2 V DC to 28.8 V DC.

Does the OP 77B have a touchscreen?

No, the OP 77B uses a keypad-based interface with dedicated function keys and system keys. It does not feature a touchscreen.

What is the IP protection rating of the OP 77B front panel?

The front of the OP 77B panel is rated IP65, providing protection against dust ingress and low-pressure water jets, making it suitable for typical industrial machine environments.

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 19.2 V to 28.8 V DC range. Inspect the supply cable and connector for damage.

Restore the correct supply voltage if out of range. If voltage is correct and the display remains blank, the internal power supply or backlight may have failed and the unit should be sent for repair or replacement.

Panel cannot establish communication with the PLC

Verify the MPI or PROFIBUS DP cable is securely connected at both the panel and PLC ends. Check that bus termination resistors are correctly placed at both ends of the network. Confirm the panel and PLC addresses are correctly configured in the WinCC flexible project.

Replace or reseat communication cables. Correct any address mismatches in the WinCC flexible project and re-download the project to the panel. Ensure baud rates match across all network nodes.

Project download to the panel fails

Confirm the PC running WinCC flexible is connected to the panel via a valid MPI or PROFIBUS DP cable and adapter. Check that the panel is in transfer mode, which can be activated from the panel's start center or loader menu.

Switch the panel to transfer mode manually via the loader. Verify the correct communication port and baud rate are selected in WinCC flexible transfer settings. Retry the download after confirming settings.

Function keys do not respond or produce incorrect actions

Check the WinCC flexible project configuration to verify that function key assignments are correctly defined for the active screen. Inspect the keypad membrane for physical damage or contamination.

Correct any incorrect key assignments in the WinCC flexible project and re-download to the panel. If keys are physically damaged or unresponsive despite correct configuration, the keypad membrane may require replacement.

Panel repeatedly restarts or shows a continuous reboot loop

A corrupted project file or an interrupted firmware update can cause continuous rebooting. Check if the panel enters the loader/start center during the boot cycle, which would indicate the runtime project is corrupted.

Boot the panel into the loader menu and perform a project re-download from WinCC flexible. If the firmware is suspected to be corrupted, perform a firmware update using the Siemens ProSave tool via MPI or PROFIBUS DP.

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