Siemens 6AV6355-1CA47-7CM3 OP 177B

€ 2.995,00

SKU: 6AV6355-1CA47-7CM3 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7CM3 is an operator panel belonging to the SIMATIC HMI OP 177B series, part of Siemens' established line of panel-based human-machine interface devices. This unit provides a combined keypad and display interface designed for machine-level operator control and monitoring tasks. It is a mid-range HMI panel within the SIMATIC HMI portfolio, offering a balance of functionality and compact form factor suitable for a wide range of automation environments.

The OP 177B features a 5.7-inch STN display with a resolution of 320 x 240 pixels (QVGA) and supports up to 256 colors, providing clear visualization of process data and graphics. The panel is equipped with a membrane keypad including function keys, system keys, and numeric/alphanumeric input keys for operator interaction without requiring a touchscreen. It supports PROFIBUS DP and MPI communication interfaces for direct integration with Siemens SIMATIC S7 PLCs, as well as RS-422/RS-485 serial interfaces for connectivity to third-party controllers. The unit operates on 24 V DC supply voltage and is rated to IP65 on the front face, providing protection against dust and water jets in industrial environments. Configuration is performed using Siemens WinCC flexible software.

The OP 177B is widely deployed in machine tool control panels, packaging machinery, conveyor systems, and process automation installations across manufacturing, food and beverage, and automotive industries. Its robust keypad-based input method makes it particularly suitable for environments where touchscreen operation is impractical due to gloves, contamination, or vibration. The panel's native PROFIBUS DP and MPI connectivity makes it a natural fit for installations built around Siemens SIMATIC S7-300 and S7-400 PLC platforms.

Technical Specifications

Display Size	5.7 inch
Display Resolution	320 x 240 pixels (QVGA)
Display Type	STN color LCD
Display Colors	256 colors
Input Voltage	24 V DC
Power Consumption	Max. 9 W
Communication Interface	PROFIBUS DP, MPI, RS-422/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 mounting
Configuration Software	WinCC flexible 2008
Series/Product Family	SIMATIC HMI OP 177B

Common Error Codes & System Events

Event ID: 10000: Communication error between the HMI panel and the connected PLC. The configured connection to the controller cannot be established or has been lost.
Check PROFIBUS DP or MPI cable connections and termination resistors. Verify the PLC is powered and running. Confirm the configured station address matches the physical PLC address.
Event ID: 10001: Connection to the PLC was interrupted during operation. The panel has lost communication with the controller.
Inspect cable integrity and connector seating. Check for EMC interference sources near the communication cable. Restart the PLC and HMI panel if the connection does not recover automatically.
Event ID: 20000: Project download error. A project transfer from the configuration PC to the HMI panel has failed.
Verify the transfer cable or network connection between the PC and panel. Ensure WinCC flexible is configured with the correct transfer settings and that the panel is in transfer mode.
Event ID: 40000: Tag read error. The HMI panel is unable to read a configured tag from the PLC.
Confirm the tag address in the WinCC flexible project matches the actual PLC data block or memory address. Check that the PLC program has not been modified to remove or relocate the referenced variable.
Event ID: 40001: Tag write error. The HMI panel is unable to write a value to a configured PLC tag.
Verify the tag address and data type configuration in WinCC flexible. Ensure the PLC memory area is not write-protected and that the PLC is in RUN mode.
Event ID: 50000: Internal device error or system fault detected on the HMI panel.
Perform a panel restart. If the fault persists, perform a factory reset and reload the project. Check the operating voltage supply for stability at 24 V DC.
Event ID: 60000: Backup battery low or battery failure. The internal buffer battery for retaining data during power loss is discharged.
Replace the internal backup battery with the correct Siemens replacement battery. Refer to the OP 177B operating instructions for the battery replacement procedure.
Event ID: 70000: Operating system or firmware error. The panel firmware may be corrupted or incompatible with the loaded project.
Update the panel firmware using ProSave or WinCC flexible to a version compatible with the project. Perform a complete panel reset before reloading the project.

Frequently Asked Questions

Which PLCs are compatible with the OP 177B?

The OP 177B is primarily designed for use with Siemens SIMATIC S7-300 and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It can also communicate with S7-200 PLCs and select third-party controllers via the RS-422/RS-485 serial interface using appropriate drivers in WinCC flexible.

What software is required to configure the OP 177B?

The OP 177B is configured using Siemens WinCC flexible software, specifically WinCC flexible 2008 or compatible versions. Projects are transferred to the panel via a PC/PPI cable, MPI adapter, or PROFIBUS connection.

What is the supply voltage for the 6AV6355-1CA47-7CM3?

The panel requires a 24 V DC supply voltage. The supply must be within the specified tolerance range and should be a regulated SELV power supply.

Does the OP 177B support touchscreen input?

No, the OP 177B is a keypad-operated panel and does not feature a touchscreen. Operator input is performed via the integrated membrane keypad, which includes function keys, cursor keys, and alphanumeric keys.

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

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

Troubleshooting

Display remains blank after power is applied

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

Correct any supply voltage issues. If the supply is confirmed good and the display remains blank, the internal power supply board or backlight inverter may have failed and the unit should be sent for repair or replacement.

HMI panel cannot establish communication with the S7 PLC

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 station address configured on the panel matches the PLC address.

Replace or reseat the communication cable. Correct the station address in the WinCC flexible project and retransfer the project. Ensure no duplicate addresses exist on the bus.

Project transfer from PC to panel fails repeatedly

Confirm the panel is set to transfer mode (accessible via the panel's Start Center or loader menu). Verify the communication interface and baud rate settings match between WinCC flexible and the panel.

Set the panel to transfer mode manually via the Start Center. Match the transfer settings in WinCC flexible to the panel configuration. Try an alternative transfer cable or connection method if the issue persists.

Function keys do not respond or produce incorrect inputs

Inspect the membrane keypad for physical damage, contamination, or deformation. Test each key systematically using the panel's built-in key test function if available in the Start Center diagnostics.

Clean the keypad surface with a dry cloth. If individual keys are unresponsive due to membrane damage, the keypad membrane assembly requires replacement. Contact a qualified repair service for membrane replacement.

Panel displays corrupted graphics or incorrect project content after power cycle

This may indicate a corrupted project file in flash memory, possibly caused by a power interruption during a previous project transfer or a failing storage medium.

Perform a complete panel reset to restore factory defaults, then retransfer the WinCC flexible project from the configuration PC. Ensure a stable power supply is maintained during all future project transfers.

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