Siemens 6AV6321-1EC34-0MY0 SIMATIC HMI OP 320

Name: Siemens 6AV6321-1EC34-0MY0 SIMATIC HMI OP 320
Brand: Siemens
SKU: 6AV6321-1EC34-0MY0
Price: 2495.00 EUR
Availability: InStock

€ 2.495,00

Condition

Clear

SKU: 6AV6321-1EC34-0MY0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6321-1EC34-0MY0 is an operator panel belonging to the SIMATIC HMI OP 320 series, manufactured by Siemens AG. It is a key-operated panel HMI device designed for machine-level human-machine interface applications, providing operator control and monitoring functionality without a touchscreen. The unit is part of the SIMATIC HMI product family and is intended for integration into control cabinets and machine panels.

The OP 320 panel features a monochrome LCD display with a resolution of 320 x 240 pixels (QVGA), offering clear visualization of process data, alarms, and status information. It communicates via MPI and PROFIBUS DP interfaces, enabling direct connection to SIMATIC S7 PLCs and other compatible controllers. The panel is configured using Siemens WinCC flexible or STEP 7 ProTool engineering software and supports function keys for direct operator input. It operates on a 24 V DC supply and is rated for industrial environments with an IP65 protection rating on the front face.

The SIMATIC OP 320 is widely used in manufacturing automation, machine tool control, packaging machinery, and process plant environments where robust, key-operated HMI interaction is preferred over touchscreen solutions. Its compatibility with the SIMATIC S7-200, S7-300, and S7-400 controller families makes it suitable for a broad range of automation architectures. The panel is particularly valued in applications where gloved-hand operation or harsh environmental conditions make membrane keypad operation more practical than touch input.

Technical Specifications

Display Type	Monochrome LCD
Display Resolution	320 x 240 pixels (QVGA)
Display Size	5.7 inch
Touch Technology	None (membrane keypad operation)
Input Voltage	24 V DC
Voltage Tolerance	19.2 V DC to 28.8 V DC
Communication Interface	MPI, PROFIBUS DP
IP Protection Rating (Front)	IP65
IP Protection Rating (Rear)	IP20
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10 % to 90 % (non-condensing)
Mounting	Panel mounting
Certifications	CE, UL, cULus
Series/Product Family	SIMATIC HMI OP 320

Common Error Codes & System Events

Event ID: 10000: Communication error between the HMI panel and the connected PLC. The panel cannot establish or maintain a connection to the controller.
Check MPI or PROFIBUS DP cable connections and termination resistors. Verify the PLC address settings match the HMI project configuration. Ensure the PLC is powered and in RUN mode.
Event ID: 10001: Connection to the PLC was interrupted during operation.
Inspect the communication cable for damage or loose connectors. Check bus termination and cable shielding. Restart the HMI panel and verify PLC communication parameters.
Event ID: 20000: Project download error. The configuration project could not be transferred to the panel.
Verify the PC-to-panel connection (MPI or serial cable). Ensure the correct COM port and transfer settings are selected in WinCC flexible or ProTool. Check that the panel is in transfer mode before initiating download.
Event ID: 40000: Internal memory error detected on the HMI panel.
Perform a panel reset and attempt to reload the project. If the error persists, the internal flash memory may be faulty and the unit should be sent for repair or replacement.
Event ID: 50000: Configuration error. The loaded project is incompatible with the panel firmware version.
Update the panel firmware to the version compatible with the project, or recompile the project using the correct target device settings in WinCC flexible or ProTool.
Event ID: 60000: Power supply undervoltage detected. The supply voltage has dropped below the minimum operating threshold.
Measure the 24 V DC supply at the panel power connector. Ensure the supply is within the 19.2 V DC to 28.8 V DC range. Check wiring and the power supply unit output under load.
Event ID: 70000: Alarm buffer overflow. The number of pending alarms has exceeded the panel's alarm buffer capacity.
Acknowledge and clear active alarms on the panel. Review the alarm configuration in the project to reduce unnecessary alarm generation or increase the alarm buffer size if supported.

Frequently Asked Questions

Which PLCs are compatible with the Siemens 6AV6321-1EC34-0MY0?

The OP 320 panel is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It can also communicate with SIMATIC S5 controllers using appropriate adapters.

What software is used to configure and program this HMI panel?

The panel is configured using Siemens WinCC flexible (compact or standard edition) or the legacy ProTool configuration software. The project is then downloaded to the panel via MPI or a serial PC adapter cable.

Does the 6AV6321-1EC34-0MY0 support touchscreen input?

No, this panel uses membrane function keys and a numeric/alphanumeric keypad for operator input. It does not have a touchscreen.

What is the supply voltage requirement for this panel?

The panel requires a 24 V DC supply with an operating range of 19.2 V DC to 28.8 V DC. An external 24 V DC power supply unit must be provided.

What is the front panel protection rating of this unit?

The front face of the panel is rated IP65, making it suitable for environments where water jets and dust ingress protection are required when correctly panel-mounted with the supplied gasket.

Troubleshooting

Display remains blank after power on

Check the 24 V DC supply voltage at the panel power connector using a multimeter. Verify the supply is within the 19.2 V to 28.8 V DC range. Inspect the power connector for loose or reversed wiring.

Correct the supply voltage or wiring as required. If the supply is confirmed correct and the display remains blank, the internal power supply board or backlight may be faulty and the unit requires repair.

Panel displays 'No connection to PLC' or communication error message

Verify the MPI or PROFIBUS DP cable is securely connected at both the panel and PLC ends. Check that bus termination resistors are correctly placed at both ends of the bus segment. Confirm the PLC address in the HMI project matches the actual PLC configuration.

Replace or reseat the communication cable. Correct the bus termination. Update the HMI project with the correct PLC address and re-download the project to the panel.

Project download fails or transfer cannot be initiated

Ensure the panel is set to transfer mode before initiating the download from the PC. Check that the correct communication interface (MPI adapter or serial cable) is selected in WinCC flexible or ProTool transfer settings.

Place the panel in transfer mode via the panel start-up menu. Select the correct COM port and baud rate in the engineering software. If using an MPI adapter, ensure the PC adapter drivers are correctly installed.

Function keys do not respond or produce incorrect actions

Check the HMI project configuration to confirm function key assignments are correctly defined. Inspect the membrane keypad for physical damage or contamination beneath the keys.

Re-download the correct project to the panel to restore key assignments. If keys are physically damaged or unresponsive due to membrane wear, the keypad membrane assembly should be replaced.

Panel repeatedly restarts or enters a boot loop

This may indicate a corrupted project file in the panel memory or a firmware issue. Attempt to access the panel start-up menu during boot to determine if the panel can reach the operating system level.

Perform a factory reset via the start-up menu if accessible, then re-download the project. If the boot loop persists, the internal flash memory may be corrupted and the unit should be returned for professional repair or firmware recovery.

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