Cerabar PMP21 IO-Link Commissioning
Endress+Hauser 33
9.5 Configuring process monitoring
For process monitoring, it is possible to specify a pressure range which is monitored by the
point level switch. Both monitoring versions are described below. The monitoring function
allows the user to define optimum ranges for the process (with high yields etc.) and deploy
a point level switch to monitor the ranges.
9.5.1 Digital process monitoring (switch output)
It is possible to select defined switch points and switchback points which act as NO or NC
contacts depending on whether a window function or hysteresis function is configured.
The "Mode" and "Logic" parameters from the IODD are grouped in the product structure
under the "Application Type" parameter. The following table compares the configurations.
Function
(IODD: Mode)
Output
(IODD: Logic)
Application type Product structure
Two Point Two Point normally open NO contact TPNO
Two Point Two point normally closed NC contact TPNC
Window Window normally open NO contact WNO
Window Window normally closed NC contact WNC
Single Point Single Point normally open NO contact SPNO
Single Point Single point normally closed NC contact SPNC
If the device is restarted within the given hysteresis, the switch output is open (0 V present
at the output).
9.5.2 Analog process monitoring (4 to 20 mA output)
• The 3.8 to 20.5 mA signal range is controlled according to NAMUR NE 43.
• The alarm current and current simulation are exceptions:
• If the defined limit is exceeded, the device continues measuring linearly. The output
current increases linearly to 20.5 mA and holds the value until the measured value
drops below 20.5 mA again or the device detects a fault.
• If the defined limit is undershot, the device continues measuring linearly. The output
current decreases linearly to 3.8 mA and holds the value until the measured value rises
above 3.8 mA again or the device detects a fault.
9.6 Current output
Operating Mode (FUNC)
Navigation Parameter → Application → Sensor → Operating Mode (FUNC)
Description Enables the desired behavior of output 2 (not IO-Link output)
Options Options:
• OFF
• 4-20 mA (I)
Value for 4 mA (STL)
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