Siemens 6AV6355-1CA47-7EM8 OP 177B

€ 1.729,97

SKU: 6AV6355-1CA47-7EM8 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7EM8 is an operator panel belonging to the SIMATIC OP 177B series, part of Siemens' established HMI product line for industrial automation. This panel provides a compact yet capable human-machine interface solution designed for machine-level operation and monitoring. It is manufactured by Siemens and integrates into the SIMATIC automation environment, supporting both configuration via WinCC flexible and direct PLC connectivity.

The OP 177B features a 5.7-inch STN color display with a resolution of 320 x 240 pixels (QVGA), offering clear visualization of process data and operator screens. It supports both touch and key-based operation, combining a resistive touchscreen with a membrane keypad for flexible input options. The panel includes MPI/PROFIBUS DP and RS-422/RS-485 interfaces for PLC communication, along with a USB port and an Ethernet interface on select variants. 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 building, packaging, food and beverage processing, and general manufacturing environments where a mid-range HMI with reliable fieldbus connectivity is required. Its compatibility with Siemens S7-200, S7-300, and S7-400 PLCs, as well as third-party controllers via configurable drivers, makes it suitable for both new installations and retrofit projects. The panel's robust construction and front-face IP65 rating make it appropriate for installation in industrial control cabinets and machine panels exposed to moderate environmental conditions.

Technical Specifications

Display Size	5.7 inch
Display Type	STN color
Display Resolution	320 x 240 pixels (QVGA)
Display Colors	256 colors
Touch Technology	Resistive touchscreen with membrane keypad
Input/Operating Voltage	24 V DC
Power Consumption	Approx. 10 W
Communication Interface	MPI/PROFIBUS DP, RS-422/RS-485, USB, Ethernet (RJ45)
IP/Protection Rating	IP65 (front face), 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 OP 177B

Common Error Codes & System Events

Event ID: 10000: Configuration error or no project loaded on the panel
Download a valid WinCC flexible project to the panel via USB or Ethernet. Verify project compatibility with the OP 177B hardware version.
Event ID: 10001: Communication link to PLC is interrupted or not established
Check MPI/PROFIBUS DP or Ethernet cable connections. Verify PLC address settings and baud rate match the HMI project configuration.
Event ID: 10002: Tag read/write error — PLC address cannot be accessed
Verify the tag address in the WinCC flexible project matches the actual PLC data block or memory area. Check PLC program for address conflicts.
Event ID: 40000: System memory low — available memory on the panel is insufficient
Reduce the number of active screens or logged data records. Archive or delete old data logs from the panel memory.
Event ID: 20000: Recipe data error — recipe record cannot be read or written
Check recipe configuration in WinCC flexible. Verify that the target PLC data block exists and has sufficient size for the recipe data.
Event ID: 50000: Alarm buffer overflow — too many alarms queued simultaneously
Acknowledge and clear pending alarms. Review alarm configuration to reduce simultaneous alarm triggers. Increase alarm buffer size in WinCC flexible project settings.
Event ID: 70000: Backup/restore error during project or data transfer
Ensure the USB storage device is formatted correctly (FAT32) and has sufficient free space. Retry the backup or restore operation.

Frequently Asked Questions

Which PLCs are compatible with the 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 configurable communication drivers in WinCC flexible.

What software is used to configure the OP 177B?

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

What is the front-face 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 panel is rated IP20.

Does the OP 177B support both touch and key input?

Yes, the OP 177B combines a resistive touchscreen with a physical membrane keypad, allowing operators to use either touch input or function keys for navigation and data entry.

What is the operating voltage of the OP 177B?

The OP 177B operates on a 24 V DC supply voltage, which is the standard control voltage used in most industrial control cabinet installations.

Troubleshooting

Display remains blank after power on

Measure 24 V DC at the power supply connector on the rear of the panel. Check that the supply voltage is within the specified tolerance range.

Restore correct 24 V DC supply. If voltage is present but display remains blank, the internal backlight or power supply board may be faulty and the unit should be sent for repair or the backlight replaced.

Panel displays 'No project' or boots to transfer mode on every startup

The panel has no valid project stored in its flash memory, or the project was corrupted during a previous transfer.

Reconnect the panel to the engineering PC running WinCC flexible and perform a full project download. Ensure the transfer is not interrupted and the correct panel type is selected in the project settings.

Communication fault with PLC — connection repeatedly drops

Check the MPI/PROFIBUS DP cable for continuity and correct termination resistors at both ends of the bus. Verify that the HMI station address does not conflict with other devices on the bus.

Replace damaged cables, ensure bus termination is active only at the two physical ends of the network, and confirm unique station addresses for all devices. Adjust baud rate settings in both the HMI project and PLC configuration if necessary.

Touchscreen input is inaccurate or unresponsive

The resistive touchscreen may require recalibration, or the screen surface may be contaminated. Check for physical damage to the touch overlay.

Access the panel's system settings during startup (press and hold the touch area at boot) and run the touchscreen calibration routine. Clean the screen surface with a soft, dry cloth. If calibration does not resolve the issue, the touch overlay may need replacement.

Panel freezes or restarts unexpectedly during operation

Check the 24 V DC supply for voltage dips or ripple using an oscilloscope or multimeter. Inspect the panel for signs of overheating, and verify the ambient temperature is within the 0 to 50 °C operating range.

Stabilize the power supply and ensure adequate ventilation around the panel. If the issue persists, back up the project, perform a factory reset via the panel's system menu, and reload the project. Persistent instability may indicate a hardware fault requiring unit repair.

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