Siemens 6AV6355-1CA47-7EC2 OP 177B

€ 855,52

SKU: 6AV6355-1CA47-7EC2 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7EC2 is an Operator Panel (OP 177B) belonging to the SIMATIC HMI series, designed for machine-level visualization and operator control tasks. This unit features a 5.7-inch STN display and is part of the Panel family that bridges basic text-based operation with graphical display capabilities. It is a compact, panel-mount HMI device intended for direct integration into control cabinet doors or machine panels.

The OP 177B 6AV6355-1CA47-7EC2 supports both MPI and PROFIBUS DP communication interfaces, enabling direct connectivity to SIMATIC S7-200, S7-300, and S7-400 PLCs without additional hardware. The unit runs on WinCC flexible runtime and supports configuration via WinCC flexible software on a PC. It provides a membrane keypad with function keys for operator input, onboard flash memory for project storage, and a 24 V DC power supply input. The display supports 256 colors and offers a resolution of 320 x 240 pixels (QVGA).

The OP 177B is widely deployed in manufacturing automation, packaging machinery, material handling systems, and process control applications where a compact, cost-effective HMI solution is required. Its compatibility with the SIMATIC S7 PLC family makes it a natural fit for existing Siemens automation architectures. The rugged membrane keypad and panel-mount design make it suitable for industrial environments with moderate levels of dust and vibration.

Technical Specifications

Display Size	5.7 inch
Display Resolution	320 x 240 pixels (QVGA)
Display Type	STN color
Display Colors	256 colors
Input Voltage	24 V DC
Power Consumption	Max. 9 W
Communication Interface	MPI, PROFIBUS DP (RS-485)
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 mount
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. Connection to the configured controller cannot be established.
Check MPI/PROFIBUS cable connections and termination resistors. Verify PLC address settings match the HMI project configuration. Ensure the PLC is powered and in RUN mode.
Event ID: 10001: Connection to PLC interrupted during operation. The HMI lost communication with the controller.
Inspect cable integrity and connector pins. Check for address conflicts on the MPI/PROFIBUS network. Restart both the HMI and PLC if the connection does not recover automatically.
Event ID: 20000: Project download error. Transfer of the WinCC flexible project to the HMI panel failed.
Verify the PC-to-panel transfer cable is correctly connected. Confirm the panel is in Transfer mode. Check that the WinCC flexible project version is compatible with the panel firmware version.
Event ID: 40000: System memory low. Available memory on the HMI device is insufficient to load or run the project.
Reduce the project size by removing unused screens, images, or variables. Ensure no unnecessary background applications are running. Consider upgrading to a panel with greater memory capacity if the project cannot be reduced.
Event ID: 50000: Firmware update error. The firmware update process was interrupted or failed to complete.
Repeat the firmware update procedure using the correct firmware version for this panel. Ensure stable power supply during the update. If the panel fails to boot, use the bootstrap loader to recover the firmware.
Event ID: 60000: Configuration error detected. The loaded project contains settings incompatible with the panel hardware.
Reload the correct project version compiled for the OP 177B hardware. Verify display type and communication interface settings in WinCC flexible match the physical panel variant.
Event ID: 70000: Tag read/write error. A variable (tag) in the project cannot be read from or written to the PLC.
Check that the PLC data block or memory address referenced by the tag exists and is accessible. Verify data type compatibility between the HMI tag and the PLC variable. Check communication link status.

Frequently Asked Questions

Which PLCs are compatible with the OP 177B 6AV6355-1CA47-7EC2?

The OP 177B is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP. It also supports connections to S7-1200 and S7-1500 via PROFIBUS DP with appropriate configuration.

What software is used to configure and program this HMI panel?

The OP 177B is configured using Siemens WinCC flexible software on a PC. The project is then transferred to the panel via a PC/PPI cable or MPI connection.

What is the supply voltage for the 6AV6355-1CA47-7EC2?

The panel 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 177B?

The front panel of the OP 177B carries an IP65 protection rating, making it resistant to dust ingress and low-pressure water jets when correctly installed in a panel cutout.

Can the OP 177B be used as a replacement for older SIMATIC OP panels?

Yes, the OP 177B is designed to be a successor to earlier SIMATIC OP panels such as the OP 17 and OP 27, and can often replace them with appropriate project migration in WinCC flexible.

Troubleshooting

Display remains blank after power is applied

Check the 24 V DC supply voltage at the power connector. Verify polarity is correct. Inspect the internal fuse if accessible.

Ensure the power supply is within the 24 V DC specification and correctly wired. If the supply is confirmed good and the display remains blank, the internal power supply board or backlight may require replacement.

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

Verify the MPI or PROFIBUS DP cable is securely connected at both the panel and PLC ends. Check bus termination at both ends of the network. Confirm the PLC node address matches the address configured in the HMI project.

Replace or reseat the communication cable. Correct any address mismatches in the WinCC flexible project. Ensure bus termination resistors are enabled only at the two physical ends of the network.

Touchscreen or function keys are unresponsive

Determine whether the panel is frozen or still running by observing screen updates. Check if the issue is limited to specific keys or all inputs. Attempt a soft reset by cycling power.

Perform a power cycle to reset the panel. If specific membrane keys are unresponsive, the membrane keypad assembly may be worn or damaged and should be replaced. If the panel is frozen, check for project errors or memory issues in WinCC flexible.

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 type and connection. Verify the WinCC flexible project is compiled without errors.

Set the panel to Transfer mode before initiating the download from WinCC flexible. Use the correct transfer cable (PC/MPI adapter or Ethernet if supported). Ensure the project is compiled for the correct panel type (OP 177B) and firmware version.

Panel repeatedly restarts or enters a boot loop

This may indicate a corrupted project file or a firmware issue. Observe whether the panel reaches the Start Center before restarting. Check the power supply for voltage drops or instability.

Use the bootstrap loader to perform a factory reset and reload the firmware using the correct version for the 6AV6355-1CA47-7EC2. After firmware recovery, retransfer the WinCC flexible project. If the issue persists, the main CPU board may require replacement.

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