IFM AL1940 - Examples; Example: Read Process Data of an IO-Link Device

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ifm Device Manual IO-Link Master with Modbus interface CabinetLine 8 Ports IP 20 (AL1940) 05 / 2018
Configuration IoT Core
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8.2.11 Examples
Example: Read process data of an IO-Link device ................................................................................41
Example: Read several parameter values of the IO-Link master simultaneously ..................................42
Example: Change name of the IO-Link master ......................................................................................42
Example: Read the parameter value of an IO-Link device .....................................................................43
Example: Change the parameter value of an IO-Link device .................................................................43
Example: Subscribe to event ..................................................................................................................44
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Example: Read process data of an IO-Link device
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Task: Read the current measured value of the ifm temperature sensor TN2531 at IO-Link port X06
Solution: Read the data point for the process input data with the getdata service.
 Request object:
{
"code":10,
"cid":4711,
"adr":"/iolinkmaster/port[6]/iolinkdevice/pdin/getdata"
}
 Return object:
{
"cid":4711,
"data":{"value": "03C9"},
"code":200
}
The return value is given in hexadecimal format. Besides the temperature value the return value
comprises additional information (→ IO Device Description (IODD) of the sensor). The temperature
value is shown in bits 2 to 15.
0x03C9 = 0b1111001001
Temperature value: 0b11110010 = 242
Therefore: The current temperature value is 24.2 °C.