Siemens 6AV6344-2AC14-0MG6 OP 177B

€ 1.995,00

SKU: 6AV6344-2AC14-0MG6 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6344-2AC14-0MG6 is an OP 177B operator panel belonging to the SIMATIC HMI family of human-machine interface devices. This unit provides a compact yet capable interface solution for machine-level visualization and control, featuring a monochrome display suitable for straightforward process monitoring tasks. As part of the SIMATIC HMI Comfort and Basic panel lineage, it is designed to integrate seamlessly with Siemens SIMATIC S7 PLCs and other compatible controllers.

The OP 177B features a 5.7-inch STN monochrome display with a resolution of 320 x 240 pixels (QVGA), supporting up to 4 gray scales for clear process visualization. It is equipped with a membrane keypad for operator input, providing tactile feedback in industrial environments. Communication is supported via MPI/PROFIBUS DP and RS-422/RS-485 interfaces, enabling direct connection to S7-200, S7-300, and S7-400 PLCs. The panel operates on a 24 V DC supply and offers 512 KB of user memory for project data, with configuration performed using Siemens WinCC flexible software.

The OP 177B is widely deployed in manufacturing, process automation, and machine building applications where a reliable, cost-effective HMI solution is required. It is particularly suited for use on standalone machines, conveyor systems, and packaging equipment where operators need to monitor process values and trigger control actions. Its robust construction and compatibility with the SIMATIC ecosystem make it a practical choice for retrofit and new installation projects in industrial environments.

Technical Specifications

Display Size	5.7 inch
Display Type	STN monochrome
Display Resolution	320 x 240 pixels (QVGA)
Display Colors	4 gray scales
Input Voltage	24 V DC
Power Consumption	Max. 6 W
User Memory	512 KB
Communication Interface	MPI/PROFIBUS DP, 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
Certifications	CE, UL, cULus

Common Error Codes & System Events

Event ID: 010000: General system error during startup or runtime initialization.
Restart the panel. If the error persists, reload the project using WinCC flexible and check for project compatibility issues.
Event ID: 040000: Communication error between the HMI panel and the connected PLC.
Check MPI/PROFIBUS DP cable connections and termination resistors. Verify the PLC address settings match the HMI project configuration.
Event ID: 070000: Project download error or project data corrupted.
Re-download the project from WinCC flexible. Ensure the project was compiled without errors before transfer.
Event ID: 080000: Memory overflow or insufficient user memory for the loaded project.
Reduce the project size by removing unused screens or tags. Check that the project does not exceed the 512 KB user memory limit.
Event ID: 110000: Tag update error — a configured tag cannot be read from or written to the PLC.
Verify the tag address in the WinCC flexible project matches the actual PLC data block or memory address. Check PLC program for address conflicts.
Event ID: 120000: Recipe data error — recipe record cannot be read or written correctly.
Check recipe configuration in WinCC flexible. Verify that the recipe data area in the PLC is correctly addressed and accessible.
Event ID: 130000: Alarm system error — alarm log or alarm buffer is full.
Acknowledge and clear pending alarms. Archive or delete the alarm log to free buffer space.
Event ID: 160000: Screen object configuration error — an object on a screen references an invalid or missing tag.
Review the screen configuration in WinCC flexible, identify objects with missing tag links, and reassign valid tags before re-downloading the project.

Frequently Asked Questions

Which PLCs are compatible with the OP 177B (6AV6344-2AC14-0MG6)?

The OP 177B is compatible with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP. It also supports communication with S7-200 via RS-422/RS-485 using the PPI protocol.

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

The OP 177B is configured using Siemens WinCC flexible 2008 software. Projects are downloaded to the panel via a PC/PPI cable or MPI connection.

What is the display type and resolution of the 6AV6344-2AC14-0MG6?

The panel features a 5.7-inch STN monochrome display with a resolution of 320 x 240 pixels (QVGA) and supports 4 gray scales.

What is the supply voltage required for the OP 177B?

The OP 177B requires a 24 V DC power supply. The permissible voltage range is typically 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 use in environments where dust and water jets 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 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 power supply unit if voltage is absent. If the display backlight has failed, the panel may require backlight replacement or unit exchange.

Panel fails to communicate with the PLC

Check the MPI or PROFIBUS DP cable for continuity and correct termination at both ends of the network. Verify the station address configured in the HMI project matches the physical PLC address.

Replace or reseat the communication cable. Correct the station address in WinCC flexible and re-download the project. Ensure bus termination resistors are enabled only at the two physical ends of the network.

Touchscreen or keypad inputs are not responding

Determine whether the issue is with specific keys or all inputs. Check for physical damage to the membrane keypad. Attempt a panel restart to rule out a software lockup.

If individual keys are unresponsive due to membrane damage, the keypad assembly requires replacement. If all inputs are frozen, perform a factory reset via the panel's Start Center and reload the project.

Project download fails or times out

Verify the PC-to-panel communication cable is correctly connected and the correct COM port or MPI adapter is selected in WinCC flexible. Check that the panel is in transfer mode via the Start Center.

Switch the panel to transfer mode manually from the Start Center menu. Reinstall the PC adapter driver if the connection is not recognized. Try a different USB-to-MPI adapter if the issue persists.

Alarm messages are displayed in incorrect language or with garbled text

Check the language settings in the WinCC flexible project and confirm the correct language is activated on the panel. Verify that the project was compiled after the language configuration was completed.

Set the correct runtime language in the WinCC flexible project, recompile, and re-download to the panel. Ensure all alarm texts are entered in the correct language fields within the project.

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