System Integration; Process Data; Reading Out And Writing Device Data (Isdu - Indexed Service Data Unit) - Endress+Hauser Liquiphant FTL33 IO-Link Operating Instructions Manual

System integration

9 System integration
9.1

Process data

The FTL3x devices can be configured with one or two switch outputs. The status of the switch
output is transmitted in the form of process data via IO-Link.
• In the SIO mode, switch output 1 is switched at pin 4 of the M12 plug. In the IO-Link
communication mode, this pin is reserved exclusively for communication.
• The device' s process data are transmitted cyclically in 16-bit chunks.
Bit
Measuring device
Bit 30 and bit 31 indicate the status of the switch outputs.
Here, 1 or DC 24 V corresponds to the logical "closed" state on the switch output.
The remaining 14 bits contain the value for the fork frequency [0 to 100.0 %]. A conversion is
not necessary.
Bit Process value
15 OU2
14 OU1
0...13 Raw value, not coverage [0 to 100]
The fork frequency is provided by the device as int13. The decimal separator must then still be
determined using a gradient.
9.2 Reading out and writing device data (ISDU – Indexed Service
Data Unit)
Device data are always exchanged acyclically and at the request of the IO-Link master. Using
the device data, the following parameter values or device statuses can be read out:
9.2.1 Endress+Hauser-specific device data
Designation ISDU
(dec)
Extended 259
Ordercode
ENP_VERSION 257
Device Type 256
Forkfrequency 79
26
0 (LSB) 1
Fork frequency [0 to 100.0 %], resolution 0.1 %
ISDU Size Data type
(hex) (byte)
0x0103 60 String
0x0101 16 String
0x0100 2 Uinteger16 r/-
0x004F 2 UInt16
... 12 13 (MSB)
Access Default Value range Offset /
value
r/-
r/- 02.03.00
0x92FD
r/- 0...1300
Liquiphant FTL33 IO-Link
14 15
OU1 OU2
Value range
0 = open
1 = closed
0 = open
1 = closed
Integer
Data Range
Gradient storage limits
0 / 0.02 No
Endress+Hauser