Siemens 6AV6344-2AC34-0MG7 OP177B

€ 1.995,00

SKU: 6AV6344-2AC34-0MG7 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6344-2AC34-0MG7 is an OP177B operator panel belonging to the SIMATIC HMI series, designed for machine-level human-machine interface applications. This unit provides a monochrome graphical display and is part of Siemens' mid-range HMI portfolio, offering reliable operator control and monitoring capabilities. The OP177B is engineered for integration into industrial control panels and machinery where robust, straightforward operator interaction is required.

The 6AV6344-2AC34-0MG7 features a 5.7-inch STN monochrome LCD display with a resolution of 320 x 240 pixels (QVGA), supporting text and graphics-based visualization. It is equipped with a membrane keypad for operator input, including function keys and system keys. Communication is supported via MPI/PROFIBUS DP and RS-422/RS-485 interfaces, enabling direct connection to SIMATIC S7 PLCs as well as third-party controllers. The panel operates on 24 V DC supply and includes an integrated configuration memory for project storage.

The OP177B is widely used in manufacturing, packaging, and process automation environments where a cost-effective, durable HMI solution is needed at the machine level. Its compatibility with the SIMATIC S7-200, S7-300, and S7-400 PLC families makes it a practical choice for system integrators working within the Siemens automation ecosystem. The panel is configured using WinCC flexible engineering software, which allows efficient project development and transfer.

Technical Specifications

Display Size	5.7 inch
Display Type	STN monochrome LCD
Display Resolution	320 x 240 pixels (QVGA)
Display Colors	Monochrome (blue/white)
Input Type	Membrane keypad
Function Keys	14 function keys
Input/Operating Voltage	24 V DC
Power Consumption	Max. 8 W
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
Certifications	CE, UL, cULus
Engineering Software	WinCC flexible 2008 or later

Common Error Codes and System Events

Event ID: 10000: Configuration error detected during startup; the project data loaded on the device is inconsistent or corrupt.
Re-transfer the project from WinCC flexible to the panel. Verify project integrity before transfer.
Event ID: 20000: Communication error with the connected PLC; the HMI cannot establish or maintain a connection.
Check MPI/PROFIBUS DP cable connections and termination resistors. Verify PLC address settings match the HMI project configuration.
Event ID: 40000: Tag read/write error; the HMI is unable to read from or write to a configured PLC tag.
Verify the PLC tag addresses in the WinCC flexible project. Ensure the PLC program is running and the relevant data blocks are accessible.
Event ID: 50000: Alarm buffer overflow; the number of pending alarms has exceeded the buffer capacity.
Acknowledge and clear existing alarms. Review alarm configuration in WinCC flexible to reduce unnecessary alarm generation.
Event ID: 60000: Internal device error; a hardware fault has been detected within the HMI panel.
Perform a power cycle. If the error persists, perform a factory reset via the Control Panel in the Transfer/Start Center menu. Contact Siemens support if unresolved.
Event ID: 70000: Memory error; insufficient memory available for project execution or data logging.
Reduce the project size, limit data log entries, or clear existing log files. Re-transfer an optimized project to the device.
Event ID: 80000: Transfer mode active; the panel is waiting for a project transfer from the engineering PC.
Transfer the project using WinCC flexible, or press Cancel on the panel to exit transfer mode and resume normal operation.

Frequently Asked Questions

Which PLCs are compatible with the OP177B (6AV6344-2AC34-0MG7)?

The OP177B is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP. It also supports connections to third-party controllers via RS-422/RS-485 using appropriate communication drivers in WinCC flexible.

What engineering software is required to configure this panel?

The OP177B is configured using Siemens WinCC flexible 2008 or a later compatible version. Projects are transferred to the panel via MPI, PROFIBUS DP, or a USB/serial connection from the engineering PC.

What is the supply voltage for the 6AV6344-2AC34-0MG7?

The panel requires a 24 V DC power supply. Ensure the supply is within the permissible tolerance range as specified in the device manual, typically 19.2 V DC to 28.8 V DC.

What is the front panel protection rating of the OP177B?

The front panel of the OP177B carries an IP65 protection rating, making it suitable for installation in environments where dust and water jets may be present.

Can the OP177B display graphics and trend curves?

Yes, the OP177B supports graphical visualization including bar graphs and trend displays, in addition to text-based screens, within the limits of its monochrome QVGA display.

Troubleshooting

Display remains blank after power on

Measure the 24 V DC supply voltage at the power connector on the rear of the panel. Check that the voltage is within the 19.2–28.8 V DC range. Inspect the display contrast setting in the Control Panel menu.

Correct the supply voltage if out of range. Adjust the display contrast via the panel's startup menu. If the display hardware is faulty, the panel will require repair or replacement of the display module.

HMI cannot communicate with the PLC

Verify the MPI or PROFIBUS DP cable is correctly connected and terminated at both ends. Check that the bus address configured in the HMI project matches the physical address set on the panel. Confirm the PLC is in RUN mode.

Replace or reseat the communication cable. Correct the bus address in WinCC flexible and re-transfer the project. Ensure terminating resistors are active only at the two physical ends of the bus segment.

Panel continuously boots into Transfer mode

The panel may have lost its project data or the startup configuration is set to always enter Transfer mode. Check the startup settings in the Control Panel accessible during boot.

Transfer a valid project from WinCC flexible to the panel. In the Control Panel startup settings, configure the panel to start the project automatically rather than entering Transfer mode.

Touchscreen or keypad inputs not responding

Check for physical damage to the membrane keypad. Verify that the panel is not in a locked state due to a screensaver or operator authorization level restriction configured in the project.

Clean the keypad surface and inspect for damage. If authorization is blocking input, enter the correct operator password. If the keypad hardware is unresponsive, the panel membrane may need replacement.

Alarm messages appear in incorrect language

The language setting in the HMI project or the runtime language selection on the panel does not match the intended display language.

In WinCC flexible, verify that the correct language is configured and that all alarm texts are translated. Use the language switching function in the project to set the correct runtime language on the panel.

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