Technical Specifications

FAQ

Q1: What is Siemens 6AG1124-1QC02-4AX1 used for?

A: Siemens 6AG1124-1QC02-4AX1 is a SIPLUS HMI KP1500 Comfort operator panel designed for industrial machine operation, process visualization, and operator monitoring. It is based on the standard 6AV2124-1QC02-0AX1 platform and features a 15.4-inch widescreen TFT display with 1280 × 800 pixel resolution and 16 million colors. The panel uses physical keys for operator input, including 36 programmable function keys with LEDs, making it suitable for applications where direct and tactile operator control is required. It can be integrated with Siemens automation systems through PROFINET, PROFIBUS, MPI, and other supported communication protocols.

Q2: Does the 6AG1124-1QC02-4AX1 use a touch screen?

A: No. The 6AG1124-1QC02-4AX1 is the KP1500 Comfort key-operated version and uses physical operator keys rather than a touch-sensitive display. It provides 36 programmable function keys, with LEDs integrated into the function keys for status indication. The panel also includes system keys, a numeric keyboard, and an alphanumeric keyboard. This design allows machine operators to execute configured commands through physical buttons and receive tactile feedback during operation. When replacing another HMI panel, the existing project should therefore be checked to ensure that its operator functions are suitable for a key-operated interface.

Q3: Which communication interfaces are available on the 6AG1124-1QC02-4AX1?

A: The panel provides two Industrial Ethernet interfaces, two PROFINET interfaces, one RS-485 interface, and two USB 2.0 interfaces. The Industrial Ethernet and PROFINET interfaces can be used for PLC communication, HMI project transfer, and integration into industrial Ethernet networks. The RS-485 interface supports compatible serial communication applications, while the USB interfaces can be used with supported peripheral or storage devices. When commissioning the HMI, the communication interface should be selected according to the connected PLC or automation equipment, and the network address and communication parameters should be configured consistently on both sides.

Q4: Which communication protocols are supported by this Siemens HMI?

A: The 6AG1124-1QC02-4AX1 supports PROFINET IO, PROFIBUS, MPI, TCP/IP, EtherNet/IP, and MODBUS communication. This range of supported protocols allows the panel to be integrated into different automation architectures and connected to compatible Siemens or third-party control equipment. The actual protocol used depends on the connected controller, HMI project configuration, and communication requirements of the application. During commissioning, the PLC connection, communication driver, device address, network parameters, and configured HMI tags should be checked together. A correct physical connection alone does not guarantee communication if the protocol or software configuration is incorrect.

Q5: What power supply is required for the 6AG1124-1QC02-4AX1?

A: The panel uses a nominal 24 V DC power supply and accepts a supply voltage from 19.2 to 28.8 V DC. The power source should be suitable for industrial automation equipment and provide stable voltage during normal operation. Before powering the HMI, verify the polarity and wiring of the DC supply and check that the actual voltage remains within the permitted range. Unstable voltage, excessive voltage drops, or electrical disturbances can cause startup failures, unexpected resets, display problems, or communication interruptions. For control cabinet installations, the HMI power supply should also be evaluated together with other connected equipment to ensure that the available supply capacity is sufficient.

Q6: What software is used to configure the 6AG1124-1QC02-4AX1?

A: The panel can be configured using WinCC Comfort within the TIA Portal engineering environment. The specified configuration environment starts from WinCC Comfort V14 SP1 with the appropriate hardware support package. During project development, the correct HMI device must be selected so that the engineering software loads the corresponding display, communication, key configuration, alarm, recipe, and system functions. When transferring a project to an existing panel, the engineering software version and HMI runtime compatibility should be checked in advance. It is also important to verify that the project contains the correct PLC connections and tag assignments before transferring it to the operator panel.

Q7: What should be checked if the HMI cannot communicate with the PLC?

A: Start by checking the power supply and physical network connection of both the HMI and PLC. For PROFINET or Industrial Ethernet communication, verify the IP address, subnet configuration, device name where applicable, network topology, and Ethernet cable connection. Confirm that the HMI project uses the correct PLC model and communication protocol and that the configured connection points to the correct controller. If PROFIBUS or MPI is used, check the interface wiring, station address, baud rate, and other applicable bus parameters. The HMI diagnostic information and PLC diagnostic buffer should also be reviewed for communication errors. If the problem started after a project update, verify that the correct project version was transferred and that the HMI tags correspond to the current PLC program.

Q8: What should be considered when replacing an existing HMI with the 6AG1124-1QC02-4AX1?

A: Before replacing an existing HMI, confirm the original model, project version, PLC connection, communication protocol, power supply, mounting requirements, and operator functions. The 6AG1124-1QC02-4AX1 is a KP1500 Comfort key-operated panel, so particular attention should be paid to applications that previously used touch operation. The existing HMI project should be reviewed for screen layouts, function-key assignments, PLC tags, alarms, recipes, user permissions, and communication settings. After installation, verify the display, physical keys, communication interfaces, PLC data exchange, alarm functions, recipes, and user access. A complete functional test should be performed before the replacement panel is returned to normal production operation.