Siemens 6AV6355-1CA47-7EM3 OP 177B

€ 1.995,00

SKU: 6AV6355-1CA47-7EM3 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7EM3 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 graphical 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 product line, which is widely deployed in industrial automation environments.

The OP 177B (6AV6355-1CA47-7EM3) features a 5.7-inch STN display and supports communication via MPI, PROFIBUS DP, and Ethernet interfaces, enabling integration with SIMATIC S7 PLCs and other compatible controllers. The panel includes onboard flash memory for project storage and is configured using WinCC flexible engineering software. It supports function keys, system keys, and numeric/alphanumeric input, and is built to meet industrial environmental requirements including IP65 protection on the front face.

This operator panel is commonly used in manufacturing, packaging, and process automation applications where a compact, panel-mount HMI is required at the machine level. Its compatibility with SIMATIC S7-200, S7-300, and S7-400 PLCs makes it suitable for a broad range of automation tasks. The OP 177B is particularly well-suited for applications requiring reliable local operator interaction with moderate display and input requirements.

Technical Specifications

Display Size	5.7 inch
Display Type	STN LCD
Display Colors	256 colors
Display Resolution	320 x 240 pixels (QVGA)
Operating Voltage	24 V DC
Power Consumption	Max. 12 W
Communication Interface	MPI, PROFIBUS DP, Ethernet (RJ45)
IP Protection Rating (Front)	IP65
IP Protection Rating (Rear)	IP20
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90%, non-condensing
Mounting	Panel mounting
Engineering Software	WinCC flexible 2005 or higher
Certifications	CE, UL, cULus

Common Error Codes & System Events

Event ID: 10000: Communication error between HMI panel and PLC. The configured connection to the controller cannot be established or has been lost.
Check physical connection cables and connectors. Verify MPI or PROFIBUS address settings on both the panel and PLC. Ensure the PLC is in RUN mode and the communication parameters in WinCC flexible match the controller configuration.
Event ID: 10001: Connection to PLC interrupted during runtime. The HMI lost communication with the configured controller.
Inspect cabling for damage or loose connections. Check bus termination resistors on PROFIBUS segments. Restart the HMI and PLC, and verify network topology and address assignments.
Event ID: 20000: Project download error. The project could not be transferred to the HMI panel successfully.
Verify the transfer cable or Ethernet connection between the engineering PC and the panel. Ensure the panel is in transfer mode and that the correct COM port or IP address is configured in WinCC flexible.
Event ID: 40000: Tag read/write error. A configured variable (tag) could not be read from or written to the PLC.
Check that the tag address in WinCC flexible matches the actual PLC memory address. Verify the data type and address range are correct and that the PLC program has the corresponding data blocks or memory areas defined.
Event ID: 50000: Illegal system state detected. The HMI operating system encountered an unexpected condition.
Perform a warm restart of the HMI panel. If the error persists, reload the project via WinCC flexible and consider updating the panel firmware to the latest compatible version.
Event ID: 70000: Flash memory error. The internal flash memory used for project or data storage has encountered a fault.
Attempt to re-download the project to the panel. If the error persists, the internal flash memory may be corrupted or failing; the panel may require hardware repair or replacement.
Event ID: 110000: Printer communication error. The HMI cannot communicate with the configured printer.
Check the printer connection and ensure the correct printer driver is configured in WinCC flexible. Verify the interface settings (serial or network) match the printer configuration.

Frequently Asked Questions

Which engineering software is required to configure the OP 177B (6AV6355-1CA47-7EM3)?

The OP 177B is configured using Siemens WinCC flexible 2005 or a later version. The project is created on a PC and then transferred to the panel via MPI, PROFIBUS, or Ethernet.

Which Siemens PLCs are compatible with this operator panel?

The OP 177B is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs, as well as other controllers supported by WinCC flexible via MPI, PROFIBUS DP, or Ethernet communication.

What is the supply voltage for the 6AV6355-1CA47-7EM3?

The panel operates on 24 V DC supply voltage, which is the standard supply for SIMATIC HMI operator panels.

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

The front face of the OP 177B is rated IP65, making it resistant to dust ingress and low-pressure water jets, suitable for panel-mount installation in industrial enclosures.

Can the OP 177B communicate over Ethernet?

Yes, the 6AV6355-1CA47-7EM3 variant of the OP 177B includes an Ethernet (RJ45) interface in addition to MPI and PROFIBUS DP, allowing integration into standard industrial Ethernet networks.

Troubleshooting

Display remains blank after power is applied

Check the 24 V DC supply voltage at the panel's power connector. Measure voltage with a multimeter to confirm it is within the acceptable range. Inspect the power connector for loose or incorrect wiring.

Ensure the 24 V DC supply is stable and correctly connected. If the supply is confirmed good but the display remains blank, the internal power supply or backlight may have failed, requiring hardware inspection or panel repair.

HMI panel cannot establish communication with the PLC

Verify the MPI or PROFIBUS address configured on the panel matches the network settings. Check the physical cable connections and bus termination. Confirm the PLC is powered and in RUN mode.

Correct any address mismatches in the WinCC flexible project settings. Replace damaged cables and ensure proper bus termination resistors are installed at both ends of the PROFIBUS segment. Re-download the project after making corrections.

Project transfer from PC to panel fails

Confirm the panel is set to transfer mode (accessible via the Start Center on the panel). Check the transfer cable or Ethernet connection between the engineering PC and the panel. Verify the correct interface and address are selected in WinCC flexible transfer settings.

Switch the panel to transfer mode manually via the Start Center menu. Use a known-good transfer cable or verify the Ethernet IP address configuration. Disable any firewall software on the PC that may block the transfer connection.

Touchscreen or function keys are unresponsive

Check whether the panel is in an active runtime state or if a screen saver or screensaver lock is active. Attempt to press multiple keys to rule out a temporary software freeze. Observe whether the panel responds to any input at all.

Perform a warm restart of the panel by cycling power. If the touchscreen is consistently unresponsive, recalibrate it via the panel's Start Center under Settings. If function keys fail, inspect for physical damage or consider panel repair.

Panel displays 'No project' or starts into Start Center instead of runtime

The project stored in flash memory may be missing, corrupted, or incompatible with the current firmware version. Check the firmware version on the panel and compare it with the WinCC flexible project settings.

Re-transfer the project from the engineering PC using WinCC flexible. Ensure the project is compiled without errors before transfer. If the firmware version is mismatched, update the panel firmware to the version compatible with the project.

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