Siemens 6AV6344-2AD24-0CG7 OP 177B

€ 1.995,00

SKU: 6AV6344-2AD24-0CG7 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6344-2AD24-0CG7 is an OP 177B operator panel belonging to the SIMATIC HMI family, designed for machine-level human-machine interface applications. This unit provides a monochrome or color display with touch and key-based operation, offering a compact and robust solution for process visualization and control. As part of the SIMATIC HMI Comfort and Basic panel lineage, it is engineered to integrate seamlessly with Siemens SIMATIC S7 and other compatible PLC platforms.

The OP 177B features a 5.7-inch STN display with a resolution of 320 x 240 pixels and supports up to 256 colors. It is equipped with MPI/PROFIBUS DP and RS-422/RS-485 communication interfaces, enabling direct connection to SIMATIC S7-200, S7-300, and S7-400 controllers. The panel includes 2 MB of user memory for project data, supports recipe management, alarm logging, and trend display functions, and operates on a 24 V DC supply. A USB interface is provided for project transfer and data backup.

The OP 177B is widely deployed in manufacturing, packaging, and process automation environments where a reliable and cost-effective operator interface is required at the machine level. Its compact form factor and panel-mount design make it suitable for integration into control cabinets and machine enclosures. The combination of touch screen and function keys provides operational flexibility for applications in the food and beverage, automotive, and chemical processing industries.

Technical Specifications

Display Size	5.7 inch
Display Resolution	320 x 240 pixels
Display Type	STN color LCD
Display Colors	256 colors
Touch Technology	Resistive touchscreen with membrane keypad
Input/Operating Voltage	24 V DC
Power Consumption	Max. 10 W
User Memory	2 MB
Communication Interface	MPI/PROFIBUS DP, RS-422/RS-485, USB
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
Mounting	Panel mounting
Certifications	CE, UL, cULus
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 cannot be established.
Check MPI/PROFIBUS DP cable connections and termination resistors. Verify the PLC address and baud rate settings match the HMI project configuration.
Event ID: 10001: Connection to the PLC was interrupted during operation.
Inspect communication cables for damage. Verify PLC is powered and running. Check for address conflicts on the MPI/PROFIBUS network.
Event ID: 20000: Project download error. Transfer of the HMI project to the panel failed.
Ensure the USB or MPI connection is stable during transfer. Verify sufficient free memory on the device and that the correct panel type is selected in WinCC flexible.
Event ID: 40000: System memory low. Available user memory on the panel is insufficient for the loaded project.
Reduce project size by removing unused screens, graphics, or recipes. Transfer an optimized project to the device.
Event ID: 50000: Internal device error or hardware fault detected.
Perform a factory reset via the Start Center. If the fault persists, the unit may require repair or replacement of internal components.
Event ID: 60000: Configuration error. The project loaded on the panel is incompatible with the current firmware version.
Update the panel firmware using ProSave or WinCC flexible, then re-transfer the project compiled for the matching firmware version.
Event ID: 70000: Backup/restore error. Data backup or restore operation via USB failed.
Check that the USB storage device is formatted correctly (FAT32) and has sufficient free space. Retry the backup or restore operation.

Frequently Asked Questions

Which PLC systems are compatible with the OP 177B (6AV6344-2AD24-0CG7)?

The OP 177B is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It also supports connections to third-party controllers via RS-422/RS-485 using standard protocols.

What software is used to configure and program the OP 177B?

The OP 177B is configured using Siemens WinCC flexible 2008 or later. Projects are transferred to the panel via USB or MPI connection using the ProSave utility or directly from WinCC flexible.

What is the display type and resolution of the 6AV6344-2AD24-0CG7?

This unit features a 5.7-inch STN color LCD with a resolution of 320 x 240 pixels and supports up to 256 colors.

What is the operating voltage for the OP 177B?

The OP 177B operates on a 24 V DC supply voltage. Ensure the power supply is within the specified tolerance range to avoid device faults.

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 suitable for installation in environments where dust and water spray may be present.

Troubleshooting

Display remains blank after power on

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

Correct the supply voltage if out of range. If voltage is correct and display remains blank, the internal power supply or backlight may have failed and the unit should be sent for repair.

HMI cannot establish communication with the PLC

Verify MPI or PROFIBUS DP cable connections and check that termination resistors are correctly placed at both ends of the bus. Confirm the PLC address and baud rate in the HMI project match the physical network settings.

Correct any wiring faults, set matching bus parameters in both the PLC and HMI project, and re-download the project. Replace the communication cable if damaged.

Touchscreen does not respond or responds inaccurately

Check for physical damage or contamination on the touchscreen surface. Access the Start Center on the panel and run the touchscreen calibration routine.

Clean the touchscreen surface with a soft, dry cloth. Recalibrate the touchscreen via the Start Center calibration tool. If unresponsive after calibration, the touchscreen assembly may require replacement.

Project transfer fails during download from WinCC flexible

Check the USB cable connection between the PC and the panel. Verify that the panel is in Transfer mode via the Start Center and that the correct panel type and firmware version are selected in WinCC flexible.

Switch the panel to Transfer mode manually, use a known-good USB cable, and ensure the WinCC flexible project is compiled for the correct panel type. Update panel firmware if a version mismatch is detected.

Panel repeatedly restarts or shows a system error on boot

Attempt to access the Start Center during boot by pressing the appropriate key combination. Check if the installed project is corrupted or incompatible with the current firmware.

Use ProSave to restore the panel firmware to factory state. Re-transfer a compatible project after firmware restoration. If the issue persists, the unit likely has a hardware fault and requires professional repair.

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