Siemens 6AV6355-1CA47-7ES5 OP 77B

€ 3.495,00

SKU: 6AV6355-1CA47-7ES5 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7ES5 is an operator panel belonging to the OP 77B series within Siemens' SIMATIC HMI product line. This compact panel operator unit is designed for machine-level human-machine interface applications, providing a straightforward interface for process monitoring and control. As part of the SIMATIC HMI Basic Panels family, it is engineered to integrate seamlessly with Siemens SIMATIC S7 programmable logic controllers.

The OP 77B features a monochrome LCD display with a resolution suited for text and simple graphic representation, along with a membrane keypad for operator input. It supports MPI and PROFIBUS DP communication interfaces, enabling direct connection to S7-200, S7-300, and S7-400 PLCs without additional hardware. The panel is configured using Siemens WinCC flexible software and offers a compact, robust construction suitable for front-panel mounting in control cabinets.

The 6AV6355-1CA47-7ES5 is commonly deployed in manufacturing, machine building, and process automation environments where a cost-effective, reliable operator interface is required. It is well suited for applications such as packaging machinery, conveyor systems, and general-purpose industrial machines where operators need to monitor process values, acknowledge alarms, and adjust setpoints without requiring a full graphical touchscreen panel.

Technical Specifications

Series	SIMATIC HMI OP 77B
Display Type	Monochrome LCD
Display Size	4 lines x 20 characters
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 Rating (Front)	IP65
IP Rating (Rear)	IP20
Mounting	Panel mounting
Certifications	CE, UL
Configuration Software	WinCC flexible 2005 or higher

Common Error Codes & System Events

System Error 1: Communication error between the OP 77B and the connected PLC via MPI or PROFIBUS DP.
Check the MPI/PROFIBUS cable connections and termination resistors. Verify the PLC address settings match the configuration in WinCC flexible.
System Error 2: Project data on the panel is corrupted or missing.
Re-transfer the project from the engineering PC using WinCC flexible. Ensure the transfer cable and settings are correct.
System Error 3: Operating system error or firmware mismatch detected on the panel.
Update the panel firmware using the ProSave tool or WinCC flexible to match the version required by the project.
System Error 4: Panel memory overflow; the project exceeds the available memory of the device.
Reduce the project size in WinCC flexible by optimizing screens, tags, or alarm lists, then re-transfer the project.
Connection Error: No connection to the configured PLC could be established at startup.
Verify PLC is powered and running, check bus address configuration, and inspect physical cable integrity and connector pins.
Transfer Mode Active: Panel is waiting in transfer mode and not displaying the runtime project.
Initiate project transfer from WinCC flexible or restart the panel to resume normal runtime operation if transfer was unintended.
Alarm: Tag Limit Exceeded: A monitored process tag has exceeded its configured high or low limit.
Acknowledge the alarm on the panel and investigate the process value at the PLC. Adjust the process or correct the limit configuration if necessary.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B panel?

The OP 77B supports direct connection to Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It can also connect to S7-200 via PPI protocol.

What software is used to configure the 6AV6355-1CA47-7ES5?

The panel is configured using Siemens WinCC flexible 2005 or a later compatible version. The project is then transferred to the panel via MPI, PROFIBUS, or a serial PC/PPI cable.

What is the supply voltage for this operator panel?

The OP 77B requires a 24 V DC power supply. Ensure the supply is within the specified tolerance range to avoid damage or malfunction.

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

The front panel of the OP 77B is rated IP65, making it resistant to dust ingress and low-pressure water jets, suitable for typical industrial cabinet installations.

Can the OP 77B display graphical images or only text?

The OP 77B is primarily a text-based operator panel with a character LCD display. It does not support full graphical screens or bitmap images in the same way as graphic HMI panels such as the TP or MP series.

Troubleshooting

Display remains blank after power is applied

Check the 24 V DC supply voltage at the panel power connector using a multimeter. Verify polarity is correct and voltage is within the acceptable range.

Correct any wiring errors or supply voltage issues. If the supply is confirmed good and the display remains blank, the internal power supply or display unit may be faulty and the panel should be sent for repair or replacement.

Panel shows 'No connection to PLC' or communication error at startup

Inspect the MPI or PROFIBUS DP cable for physical damage, loose connectors, or missing bus termination resistors at both ends of the bus segment.

Replace or reseat the communication cable, ensure correct bus termination is applied, and verify that the PLC address configured in WinCC flexible matches the actual PLC MPI/PROFIBUS address.

Project transfer from PC to panel fails

Confirm the panel is set to transfer mode via the panel's start center menu. Check that the communication interface selected in WinCC flexible matches the physical connection being used.

Set the panel to transfer mode, verify the correct COM port or MPI/PROFIBUS adapter is selected in WinCC flexible, and retry the transfer. Update panel firmware using ProSave if version incompatibility is suspected.

Operator keypad buttons are unresponsive or intermittent

Inspect the membrane keypad for physical damage, contamination, or wear. Check if the issue is consistent across all keys or limited to specific ones.

Clean the keypad surface with a dry cloth. If specific keys are permanently unresponsive, the membrane keypad assembly may need to be replaced by a qualified repair technician.

Panel restarts repeatedly or enters a boot loop

This may indicate corrupted firmware or a failed project transfer. Attempt to access the panel's start center during boot by pressing the appropriate key combination.

Use ProSave or WinCC flexible to restore the panel firmware to a known good version. After firmware restoration, re-transfer the project file to the panel.

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