Siemens 6AV6355-1CA47-7CL3 OP 77B

€ 3.495,00

SKU: 6AV6355-1CA47-7CL3 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7CL3 is an operator panel belonging to the OP 77B series within the Siemens SIMATIC HMI product family. This compact panel operator unit is designed for machine-level human-machine interface applications, providing operators with a straightforward interface for monitoring and controlling industrial processes. The OP 77B series is part of the broader SIMATIC HMI Micro Panels range, intended for use with Siemens S7-200 and S7-300 PLCs.

The OP 77B features a monochrome LCD display with a resolution of 160 x 64 pixels and a membrane keypad for operator input, eliminating the need for a touchscreen. It supports MPI and PROFIBUS DP communication interfaces for direct connection to Siemens SIMATIC PLCs, and includes a serial RS-422/RS-485 interface. The panel operates on 24 V DC supply voltage and offers a compact, panel-mount design with an IP65 protection rating on the front face. Configuration is performed using Siemens WinCC flexible Micro engineering software.

The OP 77B is commonly deployed in machine building, packaging machinery, conveyor systems, and small-scale process automation where a cost-effective, reliable operator interface is required. Its compatibility with S7-200 and S7-300 controllers makes it a practical choice for OEMs and system integrators working within the Siemens automation ecosystem. The rugged membrane keypad and sealed front panel make it suitable for environments with dust and moisture exposure.

Technical Specifications

Display Type	Monochrome LCD
Display Resolution	160 x 64 pixels
Input/Operating Voltage	24 V DC
Communication Interface	MPI, PROFIBUS DP, RS-422/RS-485
IP/Protection Rating	IP65 (front)
Operating Temperature	0 °C to 50 °C
Storage Temperature	-20 °C to 60 °C
Relative Humidity	10% to 90% (non-condensing)
Mounting	Panel mounting
Input Method	Membrane keypad
Engineering Software	WinCC flexible Micro
Series/Product Family	SIMATIC HMI OP 77B
Certifications	CE, UL

Common Error Codes & System Events

Event ID: 10000: No connection to PLC. The HMI panel cannot establish communication with the configured controller.
Check MPI or PROFIBUS DP cable connections and termination resistors. Verify PLC address settings match the HMI project configuration.
Event ID: 10001: Connection to PLC interrupted. An established communication link to the controller has been lost.
Inspect communication cables for damage or loose connectors. Check PLC operating state and restart communication if necessary.
Event ID: 20000: Project download error. Transfer of the HMI project from the engineering PC to the panel failed.
Verify the transfer cable connection and PC COM port settings. Ensure the panel is in transfer mode before initiating download.
Event ID: 40000: Tag read error. The panel is unable to read a configured process tag from the PLC.
Confirm the tag address exists in the PLC program and that the data type matches the HMI configuration in WinCC flexible Micro.
Event ID: 40001: Tag write error. The panel failed to write a value to a configured PLC tag.
Check that the target PLC data area is not write-protected and that the tag address and data type are correctly configured.
Event ID: 50000: System memory low. The panel's available runtime memory is critically low.
Reduce the number of active screens, alarms, or data logs in the project. Simplify the project configuration and reload.
Event ID: 60000: Internal device error. A hardware or firmware fault has been detected within the panel.
Perform a power cycle. If the error persists, perform a factory reset or contact Siemens technical support for panel replacement.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B panel?

The OP 77B is designed for use with Siemens SIMATIC S7-200 and S7-300 PLCs via MPI or PROFIBUS DP interfaces. It is not natively compatible with third-party controllers.

What software is used to configure the OP 77B?

The OP 77B is configured using Siemens WinCC flexible Micro engineering software. Projects are transferred to the panel via a serial PC/PPI or MPI cable.

What is the supply voltage for the 6AV6355-1CA47-7CL3?

The panel requires a 24 V DC power supply. Ensure the supply is within the specified tolerance range to avoid operational issues.

Does the OP 77B support touchscreen input?

No, the OP 77B uses a membrane keypad for operator input and does not feature a touchscreen. Navigation is performed using dedicated function and cursor keys.

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

The front face of the OP 77B carries an IP65 protection rating, making it resistant to dust ingress and low-pressure water jets when correctly installed in a panel cutout.

Troubleshooting

Display remains blank after power on

Measure the 24 V DC supply voltage at the power connector. Check for blown internal fuse or wiring polarity errors.

Correct any wiring faults and ensure the supply voltage is within the 24 V DC specification. Replace the internal fuse if blown, or replace the power supply unit if voltage is absent.

HMI panel shows no communication with PLC

Verify MPI or PROFIBUS DP cable connections at both the panel and PLC ends. Check bus termination resistors and confirm the PLC node address matches the project configuration.

Re-seat all communication connectors, ensure correct bus termination is applied at both ends of the network, and verify address settings in the WinCC flexible Micro project match the physical PLC configuration.

Project download from PC to panel fails

Confirm the panel is set to transfer mode via the panel's start menu. Check the serial transfer cable connection and the COM port settings on the engineering PC.

Place the panel in transfer mode, select the correct COM port in WinCC flexible Micro, and retry the download. Replace the transfer cable if communication cannot be established.

Operator keypad buttons not responding

Inspect the membrane keypad for physical damage, contamination, or deformation. Test individual keys using the panel's built-in key test function if available.

Clean the keypad surface with a dry cloth. If keys remain unresponsive, the membrane keypad assembly may require replacement as a spare part.

Alarm messages not displaying correctly or missing

Review the alarm configuration in WinCC flexible Micro for correct tag addresses and trigger conditions. Verify the PLC bit addresses assigned to alarms are active in the PLC program.

Correct any misconfigured alarm tag addresses in the project, reload the project to the panel, and confirm the corresponding PLC data bits are toggling as expected during testing.

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