Siemens 6AV6355-1CA47-7EC1 OP 177B

€ 670,41

SKU: 6AV6355-1CA47-7EC1 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7EC1 is an Operator Panel (OP 177B) belonging to the SIMATIC HMI series, designed for machine-level human-machine interface applications. This unit provides a monochrome or color display with touch and key-based operation, serving as a compact and robust panel for process visualization and control. It is part of Siemens' established SIMATIC HMI family, which is widely deployed across industrial automation environments.

The OP 177B (6AV6355-1CA47-7EC1) features a 5.7-inch STN display and supports both MPI and PROFIBUS DP communication interfaces, enabling direct integration with SIMATIC S7 PLCs. The panel includes configurable function keys, an integrated keyboard, and supports WinCC flexible as its configuration software. It operates on 24 V DC supply and is built to withstand industrial environments, carrying IP65 protection on the front face for resistance to dust and water ingress.

The OP 177B is typically used in machine building, manufacturing automation, and process control applications where a compact, reliable operator interface is required at the machine level. It is well-suited for integration with Siemens S7-300 and S7-400 PLC systems in industries such as automotive, food and beverage, packaging, and general factory automation. Its combination of physical function keys and display makes it appropriate for environments where gloved operation or high-reliability input is necessary.

Technical Specifications

Display Size	5.7 inch
Display Type	STN LCD
Display Colors	256 colors
Display Resolution	320 x 240 px (QVGA)
Input/Operating Voltage	24 V DC
Power Consumption	Max. 12 W
Communication Interface	MPI, PROFIBUS DP, RS 422/485
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
IP/Protection Rating	IP65 (front), IP20 (rear)
Mounting	Panel mounting
Configuration Software	WinCC flexible 2005 or higher
Series/Product Family	SIMATIC HMI OP 177B
Certifications	CE, UL, cULus

Common Error Codes and System Events

Event ID: 10000: Communication error between HMI panel and PLC. The configured connection to the controller cannot be established or has been interrupted.
Check MPI or PROFIBUS DP cable connections and termination resistors. Verify PLC address settings match the HMI project configuration. Ensure the PLC is in RUN mode.
Event ID: 10001: Connection to PLC was interrupted during operation. The HMI lost communication with the configured controller.
Inspect physical cabling for damage or loose connectors. Check bus termination and cable shielding. Verify network address conflicts are not present on the bus.
Event ID: 20000: Project download error. The HMI panel was unable to receive or store the project data transferred from the engineering station.
Ensure sufficient free memory on the panel. Verify the correct HMI device type is selected in WinCC flexible. Retry the transfer after restarting both the panel and the engineering PC.
Event ID: 40000: System memory low. Available memory for runtime operation is critically low, which may affect panel performance or stability.
Reduce the number of active alarms or data logs. Optimize the project to reduce memory usage. Consider archiving or clearing historical data stored on the device.
Event ID: 50000: Tag read/write error. A configured variable (tag) could not be read from or written to the connected PLC.
Verify the tag address in the WinCC flexible project matches the actual PLC data block or memory address. Check that the PLC program has not changed the relevant data areas.
Event ID: 70000: Illegal system state detected. The HMI runtime has encountered an internal inconsistency or unexpected operating condition.
Restart the HMI panel. If the error persists, reload the project from the engineering station. Check for firmware compatibility between the panel and the WinCC flexible project version.
Event ID: 110000: Recipe data error. A recipe record could not be read, written, or transferred correctly.
Check the recipe configuration in WinCC flexible for correct tag assignments and data types. Verify available storage space on the panel for recipe data.

Frequently Asked Questions

Which communication interfaces does the OP 177B (6AV6355-1CA47-7EC1) support?

The OP 177B supports MPI and PROFIBUS DP interfaces, as well as RS 422/485 serial communication. This allows direct connection to SIMATIC S7-200, S7-300, and S7-400 PLCs.

What configuration software is required for the OP 177B?

The OP 177B is configured using Siemens WinCC flexible 2005 or a later version. The correct HMI device type must be selected within the software to ensure project compatibility.

What is the supply voltage for the 6AV6355-1CA47-7EC1?

The panel operates on a 24 V DC supply voltage. The power consumption is a maximum of 12 W under normal operating conditions.

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

The front face of the OP 177B carries an IP65 protection rating, making it resistant to dust ingress and low-pressure water jets. The rear of the unit is rated IP20.

Is the OP 177B compatible with SIMATIC S7-1200 or S7-1500 PLCs?

The OP 177B is primarily designed for use with S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP. Connectivity to S7-1200 or S7-1500 is not natively supported, as those controllers are optimized for use with newer SIMATIC Basic or Comfort Panels via PROFINET.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the panel's power connector. Check that the supply is within the specified tolerance. Inspect the internal fuse if accessible.

Ensure the 24 V DC supply is stable and correctly wired. If the supply is confirmed good but the display remains off, the internal power supply board or backlight may be faulty and the unit should be sent for repair or the backlight replaced.

HMI panel shows 'No connection to PLC' or communication error on startup

Verify the MPI or PROFIBUS DP cable is correctly connected and that bus termination resistors are properly placed at both ends of the bus segment. Check the PLC address configured in the HMI project against the actual PLC settings.

Correct any address mismatches in the WinCC flexible project. Replace or reseat the communication cable. Ensure only one active bus termination exists at each end of the PROFIBUS or MPI segment.

Touchscreen or function keys are unresponsive

Check whether the panel is in transfer mode or loader mode, which disables normal runtime operation. Inspect the function key membrane for physical damage or contamination.

Exit transfer mode by cycling power or selecting the runtime option from the loader menu. If keys remain unresponsive, the keypad membrane or touch controller may require replacement.

Project transfer from WinCC flexible fails or times out

Confirm the correct communication interface (MPI or serial) is selected in WinCC flexible transfer settings. Verify the panel is in transfer mode and the cable type matches the selected interface.

Set the panel to transfer mode via the loader menu. Use a compatible PC-to-MPI adapter or USB-to-serial adapter. Ensure the WinCC flexible project is compiled without errors before initiating the transfer.

Panel reboots unexpectedly during operation

Check the 24 V DC supply for voltage dips or instability under load. Review the system event log on the panel for recorded fault events prior to the reboot.

Stabilize the power supply, ensuring it is adequately rated for the panel's power consumption. If the reboots persist with a stable supply, the panel's internal memory or firmware may be corrupted and a firmware update or factory reset should be performed.

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