Endress+Hauser Ceraphant PTP31B, Руководство по эксплуатации

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Commissioning Ceraphant PTC31B, PTP31B, PTP33B IO-Link
40 Hauser
9.5 Configuring process monitoring
To monitor the process, it is possible to specify a pressure range which is monitored by the
limit 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
limit switches 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.
Function Selection Output Abbreviation for
operation
Hysteresis Hysteresis normally open Closing HNO
Hysteresis Hysteresis normally closed NC contact HNC
Window Window normally open Closing FNO
Window Window normally closed NC contact FNC
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 up to 20.5 mA and holds the value until the measured value
drops below 20.5 mA again or the device detects an error →  44.
– 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 an error →  44.
9.6 Current output
Operating Mode (FUNC)
Navigation Display: EF → Operating Mode (FUNC)
IO-Link: 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) ((can only be selected if the device has been ordered with 4-20mA))
• DC-PNP (PNP)
Value for 4 mA (STL)