Siemens 6AV6344-2AD34-0CF7 OP 177B

€ 1.995,00

SKU: 6AV6344-2AD34-0CF7 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6344-2AD34-0CF7 is an OP 177B operator panel belonging to the SIMATIC HMI series, designed for machine-level human-machine interface applications. This unit provides a monochrome or color display with keypad-based operation, enabling operators to monitor and control industrial processes without a touchscreen. It is part of Siemens' mid-range HMI portfolio, positioned between basic text displays and full graphical touch panels.

The OP 177B features a 5.7-inch STN display and supports communication via PROFIBUS DP and MPI interfaces, allowing direct integration with SIMATIC S7-200, S7-300, and S7-400 PLCs. The panel is configured using WinCC flexible software and supports recipe management, alarm logging, trend displays, and user administration. It operates on 24 V DC supply and is rated IP65 on the front face, making it suitable for panel-mount installations in industrial environments.

The OP 177B is widely used in manufacturing, packaging, and process automation applications where reliable operator interaction is required at the machine level. Its keypad-based interface is preferred in environments where touchscreen operation is impractical due to gloves, contamination, or vibration. The panel is commonly installed in control cabinets and machine fronts across automotive, food and beverage, and general industrial sectors.

Technical Specifications

Display Size	5.7 inch
Display Type	STN LCD
Display Colors	256 colors
Display Resolution	320 x 240 px (QVGA)
Input/Operating Voltage	24 V DC
Power Consumption	Max. 10 W
Communication Interface	PROFIBUS DP, MPI
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 mount
Certifications	CE, UL, cULus
Configuration Software	WinCC flexible 2005 or higher
Series/Product Family	SIMATIC HMI OP 177B

Common Error Codes & System Events

Event ID: 10000: Configuration error detected on startup; the project loaded does not match the connected PLC or contains structural errors.
Reload the correct WinCC flexible project to the panel. Verify PLC type and communication settings match the project configuration.
Event ID: 20000: Communication error between the HMI panel and the connected PLC via MPI or PROFIBUS DP.
Check physical cable connections and bus termination. Verify MPI/PROFIBUS address settings on both the panel and PLC. Ensure baud rate settings match.
Event ID: 40000: Operating system error or firmware fault detected during panel startup or operation.
Perform a panel reset. If the fault persists, update or reinstall the panel firmware using ProSave or WinCC flexible.
Event ID: 50000: Data memory error; internal flash memory or project data is corrupted.
Delete the existing project from the panel and retransfer a valid project using WinCC flexible. Check for memory card faults if an external card is used.
Event ID: 60000: Tag communication timeout; one or more configured PLC tags are not responding within the defined cycle time.
Check PLC program to ensure the relevant data blocks and variables are active. Verify communication interface settings and cable integrity.
Event ID: 70000: Recipe data error; a recipe record could not be read from or written to the PLC or internal storage.
Verify recipe configuration in WinCC flexible. Check that the target PLC data block exists and has sufficient size. Retransfer the project if necessary.
Event ID: 80000: Alarm buffer overflow; the number of pending alarms exceeds the configured buffer capacity.
Acknowledge and clear active alarms. Review alarm configuration in WinCC flexible to increase buffer size or reduce alarm frequency.

Frequently Asked Questions

Which PLCs are compatible with the OP 177B (6AV6344-2AD34-0CF7)?

The OP 177B is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It also supports communication with S5 PLCs and third-party controllers through appropriate drivers configured in WinCC flexible.

What software is required to configure and program this panel?

The OP 177B is configured using Siemens WinCC flexible 2005 or a later version. Projects are transferred to the panel via MPI, PROFIBUS, or a USB/serial connection using the ProSave utility.

What is the supply voltage for the 6AV6344-2AD34-0CF7?

The panel operates on 24 V DC. The supply must be within the permissible tolerance range as specified in the Siemens OP 177B operating instructions.

Is the OP 177B front panel rated for wash-down or dusty environments?

The front face of the OP 177B carries an IP65 protection rating, making it resistant to dust ingress and low-pressure water jets. The rear of the unit is rated IP20 and must be protected within a suitable enclosure.

Can the OP 177B display trend curves and alarms?

Yes, the OP 177B supports trend displays, alarm logging with alarm buffer, and recipe management as standard features configurable within WinCC flexible.

Troubleshooting

Display remains blank after power on

Measure 24 V DC at the power supply connector on the rear of the panel. Check that the supply is within tolerance and that the connector is fully seated.

Restore correct 24 V DC supply. If supply is confirmed and display remains blank, the internal power supply board or backlight inverter may be faulty and the unit should be sent for repair or the backlight replaced.

Panel shows 'No connection to PLC' or communication error on startup

Check the MPI or PROFIBUS cable connections at both the panel and PLC. Verify bus termination resistors are correctly placed at both ends of the bus. Confirm address settings match between panel project and PLC configuration.

Replace or reseat the communication cable. Correct the MPI or PROFIBUS address in the WinCC flexible project and retransfer. Ensure only the two physical ends of the bus have termination enabled.

Panel fails to accept project transfer from WinCC flexible

Confirm the correct communication interface and transfer settings are selected in WinCC flexible. Check that the panel is in transfer mode, accessible via the Start Center or by pressing the Transfer button.

Set the panel to transfer mode manually via the Start Center menu. Verify the PC communication port settings and cable integrity. If using USB or serial, ensure the correct driver is installed on the engineering PC.

Keypad buttons are unresponsive or intermittently fail

Inspect the keypad membrane for physical damage, contamination, or deformation. Check internal ribbon cable connections between the keypad membrane and the main board.

Clean the keypad surface with a dry cloth. If individual keys are permanently unresponsive, the keypad membrane assembly requires replacement. Reseat the internal ribbon cable connector if accessible during repair.

Panel reboots repeatedly or freezes during operation

Check the 24 V DC supply for voltage drops or ripple caused by other loads on the same supply rail. Review the loaded project for configuration errors or excessively high tag update rates.

Provide a dedicated stable 24 V DC supply to the panel. Reduce tag polling cycles in WinCC flexible if the project is overloading the communication interface. Reload a verified project to rule out firmware or project corruption.

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