GN 9150 Control Units for GN 9153 / GN 9154 / GN 7110, Plastic, with Data Transmission

The position indicators and control communicate using a proprietary ELESA protocol. The control unit can only process the target and current position value of the position indicators and send these to the machine control. The machine control therefore cannot be accessed directly over the wireless network of the control unit. The radio communication is therefore protected against system alterations or third-party access.
Disruptions or interference from other typical wireless networks, such as WiFi, Bluetooth, etc. do not impair the functioning of the system, but they may lengthen the response time of the position indicators to the control unit.
Avoid placing the control unit immediately next to high-powered components, such as motors, converters, etc. If this is not possible, a safe distance of at least 200 mm should be ensured.
Other important information and instructions can be found in the operating instruction for control units GN 9150. This is included with every control unit and can be downloaded from www.ganternorm.com in the “Service” section.

The following components are required to start up the wireless system:

• Control unit GN 9150
• Electronic position indicators GN 9153 / GN 9154 or magnetic measuring systems GN 7110

Each control unit can be coupled to up to 36 position indicators or magnetic measuring systems. The radio frequency system network allows the operation of various machines in the same room without mutual interference. A RJ45 network cable is used to connect to the machine control. The following standard bus systems are offered for the control unit:

• Profinet
• Modbus TCP
• Ethernet / IP
• EtherCAT

The control unit can send the target position value received from the machine control to the position indicators. The indicators then report their current position via radio frequency. In addition, the programmable parameters of the networked devices can be read or configured between the control unit and the machine control over the wireless connection.

If the target position value and current position value do not match, the LCD display of the position indicator begins to flash. The machine technician must then adjust the position indicator to the correct value. The LCD display shows the difference between the target position value and the current position value and the direction in which it must be turned. It must be turned until a value of 0 appears on the display, meaning zero deviation between the current and target position value.

Example: The current position of the position indicator is 80 mm, the specified target position is 100 mm, and a difference of 20 mm appears on the display of the position indicator. The indicator must be turned in the appropriate direction until the value 0 appears on the display.

The position indicators communicate with the control units via a proprietary ELESA protocol and use the ISM SRD frequency range of 2,4 GHz ... 2,416 GHz. The following data is communicated over the radio signal:

• Device status
• Device parameters, read and write
• Target position value of the position indicator
• Current position value of the position indicator
• Battery change required

The effective range of the radio communication is up to 30 meters. The antenna of the control unit must be in a clear and ideally high location. It can also be extended, if necessary.

Each connected wireless position indicator compares its protocol with the control unit every 4 seconds. If required, this time can be reduced to 0.5 seconds. The control unit receives the information from all position indicators and processes it in chronological order.