
System integration
Cerabar PMP23 IO-Link
20
Hauser
8
System integration
8.1
Process data
The measuring device has a current output and a switch output. 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 current output at pin 2 of the M12 plug is always active or can be optionally
deactivated via IO-Link.
• The device's process data are transmitted cyclically in 24-bit chunks.
Bit
0 (LSB)
1
...
20
21 (MSB)
22
23
Measuring device
Pressure value
OU1
res.
Bit 23 is reserved. Bit 22 provides the status of the switch output.
Here, 1 or DC 24 V corresponds to the logical "closed" state on the switch output. The
remaining 22 bits contain the analog raw measured value of the device. This value has yet
to be scaled by the target system to the nominal operating range of the existing measuring
device.
Bit
Process value
Value range
22
OU1
0 = open
1 = closed
0 to 21
Raw value
Int22
The decimal separator must be determined using a factor that depends on the unit in
question. The following units are available:
• bar: 0.001
• kPa: 0.1
• MPa: 0.0001
• psi: 0.01
Examples:
Pressure value
Transmitted
Scaled with factor
-320 mbar
-320
-0.32
22 bar
22000
22
133 Pa
1330
133
665 psi
66500
665
399.5 bar
399500
399.5
8.2
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:
Содержание Cerabar PMP23
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