Siemens 6AV6344-2AC34-0CG6 OP 177B

€ 1.995,00

SKU: 6AV6344-2AC34-0CG6 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6344-2AC34-0CG6 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 graphical display with touch and key-based operation, serving as a compact yet capable panel for process visualization and control. It is part of Siemens' mid-range HMI portfolio, positioned between basic text panels and full-featured comfort panels.

The OP 177B features a 5.7-inch STN display and supports both MPI/PROFIBUS DP and Ethernet communication interfaces, enabling flexible integration into SIMATIC S7 automation environments. It is configured using WinCC flexible engineering software and supports recipe management, alarm logging, trend displays, and user administration functions. The panel includes an integrated keyboard with function keys and a touch-sensitive screen area, providing dual input methods for operator interaction.

The OP 177B is widely used in manufacturing, packaging, and process industries where a reliable, mid-size operator interface is required at the machine level. Its compatibility with SIMATIC S7-300 and S7-400 PLCs via MPI/PROFIBUS makes it a standard choice for machine builders integrating into existing Siemens automation architectures. The panel's compact form factor and panel-mount design make it suitable for installation in control cabinets and machine front panels across a broad range of industrial environments.

Technical Specifications

Display Size	5.7 inch
Display Type	STN LCD
Display Colors	256 colors
Display Resolution	320 x 240 pixels (QVGA)
Touch Technology	Resistive touchscreen with membrane keypad
Input/Operating Voltage	24 V DC
Power Consumption	Max. 9 W
Communication Interface	MPI/PROFIBUS DP, RS 422/485, Ethernet (RJ45)
Memory	4 MB user memory
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 & System Events

Event ID: 10000: Configuration error — the project loaded on the panel contains configuration faults or is incompatible with the firmware version.
Reload the project using WinCC flexible. Verify that the firmware version on the panel matches the WinCC flexible version used for configuration.
Event ID: 10001: Communication error — the panel cannot establish a connection to the configured PLC.
Check MPI/PROFIBUS or Ethernet cable connections. Verify PLC address settings and communication parameters in the project configuration.
Event ID: 10002: Tag read error — a configured tag cannot be read from the PLC.
Verify the tag address in WinCC flexible matches the actual PLC data block or memory address. Check PLC program for correct data area availability.
Event ID: 10003: Tag write error — a value cannot be written to the configured PLC tag.
Check write permissions for the tag in WinCC flexible. Verify the PLC is in RUN mode and the data area is not write-protected.
Event ID: 20000: System memory low — available user memory on the panel is critically low.
Reduce the size of the loaded project, clear alarm logs and recipe data, or transfer a smaller project to the panel.
Event ID: 40000: Firmware update error — a firmware update was interrupted or failed to complete.
Repeat the firmware update procedure using ProSave or WinCC flexible. Ensure stable power supply during the update process.
Event ID: 50000: Recipe data error — recipe records cannot be read or written correctly.
Check recipe configuration in WinCC flexible. Clear corrupted recipe data and re-transfer the project. Verify sufficient memory is available.
Event ID: 60000: Backup/restore error — a panel backup or restore operation has failed.
Retry the backup or restore operation using ProSave. Ensure the storage medium is not write-protected and has sufficient free space.

Frequently Asked Questions

Which PLCs are compatible with the OP 177B (6AV6344-2AC34-0CG6)?

The OP 177B is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It also supports Ethernet-based communication with S7 controllers when configured accordingly.

What software is required to configure the OP 177B?

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

What is the supply voltage for the OP 177B?

The OP 177B requires a 24 V DC supply voltage. The permissible voltage range is typically 19.2 V DC to 28.8 V DC.

Can the OP 177B display be operated by touch only?

The OP 177B supports both touch input and physical function key input. Operators can interact with the panel via the resistive touchscreen or the integrated membrane keypad with configurable function keys.

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 environments where dust and water jets may be present. The rear of the unit is rated IP20.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the panel's power connector. Check that the voltage is within the 19.2–28.8 V DC permissible range. Inspect the supply cable and connector for damage.

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. The unit should be sent for repair or the backlight replaced if serviceable.

Panel cannot communicate with the PLC

Verify the MPI/PROFIBUS or Ethernet cable is securely connected at both ends. Check the communication parameters (baud rate, station address) in the WinCC flexible project match the PLC configuration.

Correct any mismatched communication parameters and reload the project. Replace the communication cable if damaged. Confirm the PLC is powered and in RUN or STOP mode with communication enabled.

Touchscreen does not respond or responds inaccurately

Attempt to recalibrate the touchscreen through the panel's Start Center or Control Panel settings. Check for physical damage or contamination on the screen surface.

Clean the screen surface with a soft, dry cloth. Perform a touchscreen calibration via the operating system settings. If calibration fails repeatedly, the touchscreen overlay may need replacement.

Project transfer fails or times out

Check the transfer connection type (Ethernet, USB, or MPI) and verify the panel is set to Transfer mode via the Start Center. Confirm the PC firewall or antivirus is not blocking WinCC flexible communication.

Set the panel to Transfer mode manually before initiating the transfer. Disable firewall exceptions for WinCC flexible on the engineering PC. Try an alternative transfer medium if the primary connection is unreliable.

Alarm messages are not displayed on the panel

Check the alarm configuration in WinCC flexible to confirm alarm tags are correctly linked to PLC addresses. Verify the PLC is setting the alarm bits as expected using a PLC monitoring tool.

Correct any misconfigured alarm tag addresses in WinCC flexible and reload the project. Ensure the PLC program is writing to the correct memory locations corresponding to the configured alarm triggers.

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