Siemens 6AV6355-1CA47-7BB2 OP 177B

€ 1.808,70

SKU: 6AV6355-1CA47-7BB2 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7BB2 is an operator panel belonging to the OP 177B series within the SIMATIC HMI family. This unit provides a compact yet capable human-machine interface solution designed for machine-level visualization and control tasks. As part of the SIMATIC HMI Basic Panels generation, it combines a monochrome or color display with robust operator input capabilities suited for demanding industrial environments.

The OP 177B (6AV6355-1CA47-7BB2) features a 5.7-inch STN color display with a resolution of 320 x 240 pixels (QVGA) and supports touch and key-based operation. It is equipped with MPI/PROFIBUS DP and RS-422/RS-485 interfaces for PLC connectivity, and includes a USB port for project transfer and data backup. The panel runs on WinCC flexible runtime and offers configurable function keys, recipe management, alarm logging, and trend display capabilities. It operates on a 24 V DC supply and is rated IP65 on the front face for protection against dust and water ingress.

The OP 177B is widely deployed in machine automation across industries such as automotive manufacturing, packaging, food and beverage processing, and general factory automation. Its compatibility with Siemens S7-200, S7-300, and S7-400 PLCs, as well as third-party controllers via serial interfaces, makes it a versatile choice for OEMs and system integrators. The panel's compact footprint and front-face IP65 rating make it suitable for panel-mount installations in environments with moderate exposure to contaminants.

Technical Specifications

Display Size	5.7 inch
Display Resolution	320 x 240 pixels (QVGA)
Display Type	STN color LCD
Display Colors	256 colors
Touch Technology	Touch screen and membrane keys
Input/Operating Voltage	24 V DC
Power Consumption	Max. 12 W
Communication Interface	MPI/PROFIBUS DP, RS-422/RS-485, USB
IP/Protection Rating	IP65 (front), IP20 (rear)
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
Series/Product Family	SIMATIC HMI OP 177B

Common Error Codes & System Events

Event ID: 10000: Configuration error or no project loaded on the panel
Transfer a valid WinCC flexible project to the panel via USB or MPI/PROFIBUS connection and restart the device.
Event ID: 20000: Communication connection to PLC lost or interrupted
Check MPI/PROFIBUS DP cable connections, verify PLC address settings, and confirm baud rate configuration matches the connected controller.
Event ID: 40000: Tag read/write error — the panel cannot access a configured PLC tag
Verify the tag address in the WinCC flexible project matches the actual PLC data block or memory address. Check PLC program for address changes.
Event ID: 70010: System memory low — available runtime memory is insufficient
Reduce the number of active screens, limit logged data, or simplify the project configuration. Consider archiving older alarm and data logs.
Event ID: 110000: Illegal system activity or runtime exception detected
Restart the panel. If the fault persists, reload the WinCC flexible project and update the panel firmware to the latest compatible version.
Event ID: 130000: Recipe data error — recipe record cannot be read or written
Check recipe configuration in WinCC flexible for correct tag assignments and data types. Verify sufficient storage space on the panel.
Event ID: 50000: Alarm log or data log storage full
Archive or delete existing log files via the panel's file management or through WinCC flexible. Increase log storage capacity in the project settings if possible.

Frequently Asked Questions

Which PLCs are compatible with the Siemens 6AV6355-1CA47-7BB2 OP 177B?

The OP 177B is compatible with Siemens S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP. It also supports third-party controllers through the RS-422/RS-485 serial interface using standard protocols such as Modbus RTU.

What software is required to configure and program the OP 177B?

The OP 177B is configured using Siemens WinCC flexible 2008 or later. Projects are transferred to the panel via USB, MPI, or PROFIBUS DP connection.

What is the supply voltage for the 6AV6355-1CA47-7BB2?

The panel requires a 24 V DC supply voltage. Ensure the power supply can deliver sufficient current, as the panel consumes up to 12 W under normal operating conditions.

What is the front panel protection rating of the OP 177B?

The front face of the OP 177B is rated IP65, providing protection against dust ingress and low-pressure water jets. The rear of the unit is rated IP20.

Can the OP 177B display be operated by touch input alone?

The OP 177B supports both touch screen input and physical membrane function keys. Depending on the project configuration, operators can use either or both input methods.

Troubleshooting

Display remains blank after power on

Measure the 24 V DC supply voltage at the panel's power connector. Check for blown fuses in the control cabinet supply circuit. Verify the power supply unit output under load.

Restore correct 24 V DC supply voltage. Replace any blown fuses. If the supply voltage is correct and the display remains blank, the internal power supply or backlight of the panel may be faulty and the unit should be sent for repair.

Panel shows 'No project' or boots into transfer mode on every startup

Check whether a valid WinCC flexible project has been successfully transferred and saved to the panel's internal flash memory. Confirm the project transfer completed without errors.

Re-transfer the WinCC flexible project to the panel using USB or MPI connection. Ensure the transfer completes fully before powering down. If the issue persists, perform a factory reset and re-transfer the project.

Communication fault to PLC — connection shown as offline in runtime

Inspect MPI or PROFIBUS DP cable for damage, loose connectors, or incorrect termination resistors. Verify the PLC address and baud rate configured in the WinCC flexible project match the actual PLC settings.

Replace or reseat the communication cable. Correct the PLC address and baud rate in the project configuration and re-transfer. Ensure bus termination resistors are correctly placed at both ends of the PROFIBUS segment.

Touchscreen input not responding or responding inaccurately

Check for physical damage or contamination on the touch surface. Determine whether the issue is consistent across the entire screen or limited to specific zones, which may indicate a hardware fault.

Clean the touch surface with a soft, dry cloth. Recalibrate the touchscreen through the panel's system settings menu. If calibration does not resolve the issue, the touchscreen overlay may require replacement.

Panel freezes or restarts unexpectedly during operation

Check the 24 V DC supply for voltage dips or ripple under load. Review the alarm and event logs for system event codes indicating memory or runtime errors. Check ambient temperature around the panel.

Stabilize the power supply and ensure it meets the panel's current requirements. Reduce project complexity if memory-related event codes are present. Ensure the panel's operating environment does not exceed 50 °C. Update panel firmware if a known runtime issue exists.

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