Siemens 6AV6344-2AC24-0CG6 OP 177B

€ 1.995,00

SKU: 6AV6344-2AC24-0CG6 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6344-2AC24-0CG6 is an OP 177B operator panel belonging to the SIMATIC HMI family of human-machine interface devices. This unit is a compact, panel-mounted operator panel designed for machine-level visualization and control tasks, offering a monochrome or color display depending on the variant. As part of the SIMATIC HMI Comfort and Basic panel lineage, it is configured and programmed using WinCC flexible or STEP 7 engineering software.

The OP 177B features a 5.7-inch STN display with a resolution of 320 x 240 pixels and supports touch and key-based operation through its integrated function keys and membrane keypad. It provides MPI/PROFIBUS DP and RS-422/RS-485 serial communication interfaces, enabling direct connection to SIMATIC S7-200, S7-300, and S7-400 PLCs as well as third-party controllers. The panel includes 512 KB of user memory for project data and supports recipe management, alarm logging, and trend display functions.

The OP 177B is widely deployed in manufacturing automation, machine tool control, packaging machinery, and process plant environments where a robust, mid-range HMI solution is required. Its panel-mount design and broad PLC compatibility make it suitable for retrofitting existing control cabinets as well as new machine builds. The unit's industrial-grade construction and IP65 front protection rating ensure reliable operation in demanding production environments.

Technical Specifications

Display Size	5.7 inch
Display Resolution	320 x 240 pixels
Display Type	STN LCD
Display Colors	256 colors
Operation Type	Touch screen and membrane keypad
Input/Operating Voltage	24 V DC
Power Consumption	Max. 9 W
Communication Interface	MPI/PROFIBUS DP, RS-422/RS-485
User Memory	512 KB
Operating Temperature	0 °C to 50 °C
Storage Temperature	-20 °C to 60 °C
Relative Humidity	10% to 90%, non-condensing
IP/Protection Rating	IP65 (front), IP20 (rear)
Mounting	Panel mounting
Certifications	CE, UL, cULus
Series/Product Family	SIMATIC HMI OP 177B

Common Error Codes and System Events

Event ID: 010000: Configuration error detected during startup; project data in flash memory may be corrupted or incompatible.
Reload the project via WinCC flexible. Verify the project is compiled for the correct panel type and firmware version.
Event ID: 040000: Communication connection to the PLC has been lost or cannot be established.
Check MPI/PROFIBUS DP cable connections and termination resistors. Verify PLC address settings match the project configuration.
Event ID: 070000: Recipe data error; a recipe record could not be read or written correctly.
Check available memory on the panel. Reload the project and verify recipe configuration in WinCC flexible.
Event ID: 080000: Tag update error; one or more process tags cannot be read from the controller.
Verify PLC is in RUN mode and the tag addresses in the project match the actual PLC data blocks. Check communication interface settings.
Event ID: 110000: System memory low; available runtime memory is insufficient for current project operations.
Reduce the number of active alarms, trends, or recipe entries. Optimize the project in WinCC flexible to reduce memory usage.
Event ID: 120000: Firmware update error; the firmware transfer to the panel was interrupted or failed.
Repeat the firmware update procedure using ProSave or WinCC flexible. Ensure stable power supply during the update process.
Event ID: 140000: Internal panel hardware fault detected; self-diagnostic routine has identified a hardware error.
Perform a panel reset. If the fault persists, the unit requires repair or replacement of internal components.

Frequently Asked Questions

Which PLCs are compatible with the OP 177B (6AV6344-2AC24-0CG6)?

The OP 177B is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP. It also supports connection to third-party controllers via the RS-422/RS-485 serial interface using appropriate communication drivers.

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

The OP 177B is configured using Siemens WinCC flexible 2008 or later. Projects can also be created within STEP 7 using the integrated HMI configuration tools.

What is the supply voltage for the 6AV6344-2AC24-0CG6?

The panel requires a 24 V DC power supply. Ensure the supply is within the permitted tolerance range of 19.2 V DC to 28.8 V DC.

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.

Can the OP 177B be used with PROFIBUS DP networks?

Yes, the OP 177B supports PROFIBUS DP communication through its integrated MPI/PROFIBUS DP interface, allowing it to be integrated into existing PROFIBUS network topologies.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the power connector on the rear of the panel. Check that the voltage is within the 19.2 V to 28.8 V DC range. Inspect the internal fuse if accessible.

Correct the supply voltage if out of range. Replace the internal fuse if blown. If the backlight has failed, the display backlight or the panel itself may require replacement.

Panel fails to communicate with the S7-300 PLC via MPI

Verify the MPI cable is correctly connected and that bus termination is active at both ends of the MPI segment. Check that the MPI address configured in the panel project matches the address set on the PLC.

Correct any address mismatches in the WinCC flexible project. Replace the MPI cable if damaged. Ensure only the two end devices on the MPI bus have termination resistors enabled.

Touchscreen does not respond to input or is misaligned

Attempt to access the panel's Start Center by pressing the appropriate function key during boot. Check whether the touch calibration has drifted or whether the touch controller is unresponsive.

Perform a touchscreen recalibration from the panel's Start Center or Control Panel menu. If the touch layer is physically damaged or unresponsive after calibration, the touch screen assembly requires replacement.

Project cannot be transferred to the panel from the engineering PC

Verify the transfer cable (MPI or USB-to-serial adapter) is correctly installed and the PC communication interface is configured in WinCC flexible. Check that the panel is set to Transfer mode in the Start Center.

Set the panel to Transfer mode manually via the Start Center. Reinstall the PC adapter driver if the interface is not recognized. Ensure the correct COM port and transfer rate are selected in WinCC flexible.

Alarm events are not being displayed or logged correctly

Check the alarm configuration in the WinCC flexible project, including trigger tags, alarm classes, and display settings. Verify that the PLC tags associated with alarms are being updated correctly.

Reload the project to the panel after verifying alarm tag addresses. Ensure the PLC program is writing the correct bit values to the alarm trigger tags and that the communication connection is stable.

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