Siemens 6AV6355-1CA47-7HC5 OP 77B

€ 3.495,00

SKU: 6AV6355-1CA47-7HC5 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7HC5 is an operator panel (OP 77B) belonging to the SIMATIC HMI Basic Panels product family. This unit provides a compact, keypad-based human-machine interface designed for straightforward machine-level visualization and operator control tasks. It is part of Siemens' established SIMATIC HMI portfolio and is configured and programmed using WinCC flexible software.

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. The panel includes a membrane keypad with function keys, system keys, and numeric entry keys for operator input without a touchscreen. It supports MPI and PROFIBUS DP communication interfaces for integration with SIMATIC S7 PLCs, and provides a serial RS-422/RS-485 interface. The unit operates on a 24 V DC supply and is rated IP65 at the front panel for protection against dust and water ingress.

The OP 77B is widely used in manufacturing, machine building, and process automation applications where a cost-effective, robust operator interface is required. It is particularly suited for integration with SIMATIC S7-200, S7-300, and S7-400 PLCs in applications such as packaging machinery, conveyor systems, and general-purpose industrial equipment. Its compact form factor and keypad-based operation make it appropriate for environments where touchscreen panels are not practical.

Technical Specifications

Display Type	Monochrome STN LCD
Display Resolution	160 x 80 pixels
Display Size	4 inch (diagonal)
Input Voltage	24 V DC
Voltage Tolerance	19.2 V DC to 28.8 V DC
Power Consumption	Max. 4.5 W
Communication Interface	MPI, PROFIBUS DP, RS-422/RS-485
IP Rating (Front)	IP65
IP Rating (Rear)	IP20
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90% (non-condensing)
Mounting	Panel mounting
Certifications	CE, UL, cULus
Configuration Software	WinCC flexible 2008 or later
Series	SIMATIC HMI OP 77B

Common Error Codes and System Events

Event ID: 10000: Configuration error detected on the HMI panel. The project loaded on the device contains configuration inconsistencies.
Reload the project using WinCC flexible. Verify that the project was compiled without errors before transferring to the device.
Event ID: 20000: Communication error between the HMI panel and the connected PLC. The connection to the configured controller has been lost or cannot be established.
Check MPI or PROFIBUS DP cabling and termination resistors. Verify the bus address settings on both the panel and the PLC. Ensure the PLC is powered and in RUN mode.
Event ID: 40000: Tag read error. The HMI panel cannot read a configured tag from the PLC.
Verify that the tag address configured in WinCC flexible matches the actual data block or memory address in the PLC program. Check PLC program for address conflicts.
Event ID: 50000: Tag write error. The HMI panel cannot write a value to a configured PLC tag.
Check that the target PLC memory area is not write-protected. Verify the tag address and data type in the WinCC flexible project configuration.
Event ID: 70000: Transfer mode active. The panel is waiting for a project transfer from the engineering PC.
Initiate the project transfer from WinCC flexible, or restart the panel to exit transfer mode and load the existing project.
Event ID: 110000: System memory low. The HMI panel is running low on available runtime memory.
Reduce the number of active alarms, trend buffers, or recipe data sets in the project. Simplify the project configuration if the issue persists.
Event ID: 120000: Illegal system state detected. An internal runtime error has occurred on the panel.
Perform a controlled restart of the HMI panel. If the fault recurs, reload the project and check for configuration errors in WinCC flexible.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B (6AV6355-1CA47-7HC5)?

The OP 77B is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It also supports communication with SIMATIC S5 controllers via the RS-422/RS-485 serial interface.

What software is required to configure and program this panel?

The OP 77B is configured using Siemens WinCC flexible 2008 or a compatible version. Projects are compiled in WinCC flexible and transferred to the panel via MPI, PROFIBUS DP, or a serial PC/PPI cable.

What is the supply voltage for the 6AV6355-1CA47-7HC5?

The panel requires a 24 V DC supply voltage with an acceptable range of 19.2 V DC to 28.8 V DC. An external 24 V DC power supply must be provided.

Does the OP 77B support touchscreen input?

No, the OP 77B uses a membrane keypad for operator input and does not have a touchscreen. Input is performed via function keys, system keys, and a numeric keypad.

What is the front panel protection rating of this unit?

The front panel 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.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the power connector on the rear of the panel. Check that the voltage is within the 19.2 V to 28.8 V DC range. Inspect the internal fuse if accessible.

Correct the supply voltage if out of range. Replace the power supply if it is faulty. If the display backlight has failed but the panel is otherwise operational, the backlight or display assembly may require replacement.

HMI panel cannot communicate with the S7 PLC

Verify the MPI or PROFIBUS DP bus address configured on the panel matches the network settings. Check cable connections, connector pins, and bus termination at both ends of the network segment.

Correct the bus address in the panel settings. Replace damaged cables or connectors. Ensure termination resistors are active only at the two physical ends of the bus. Confirm the PLC is powered and in RUN or STOP mode with the network interface active.

Project transfer from WinCC flexible fails or times out

Check the communication cable between the engineering PC and the panel (MPI adapter or PC/PPI cable). Verify the panel is in transfer mode and that the correct communication port and baud rate are selected in WinCC flexible.

Restart the panel and manually activate transfer mode via the panel's start center menu. Ensure the correct COM port and transfer settings are configured in WinCC flexible. Replace the transfer cable if it is suspected to be faulty.

Operator inputs via keypad are not registered

Check whether the panel is in a locked or protected operating mode. Inspect the membrane keypad for physical damage, contamination, or delamination of the keypad overlay.

Disable any active operator authorization or screen protection settings in the WinCC flexible project. If the keypad membrane is physically damaged, the keypad assembly will need to be replaced.

Alarm or tag values displayed are incorrect or frozen

Check the communication status indicator on the panel. Verify that the PLC tags referenced in the WinCC flexible project match the actual PLC program addresses. Check for communication errors in the panel's alarm log.

Correct any address mismatches in the WinCC flexible project and retransfer the updated project to the panel. If communication is intermittent, inspect cabling and bus termination. Restart both the PLC and the HMI panel to re-establish the connection.

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