Configuring Process Monitoring; Current Output - Endress+Hauser IO-Link Ceraphant PTC31B Operating Instructions Manual

Commissioning
Operating Mode (FUNC)
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Description
Options
Value for 4 mA (STL)
40
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
Hysteresis Hysteresis normally open
Hysteresis Hysteresis normally closed
Window Window normally open
Window Window normally closed
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

Display: EF → Operating Mode (FUNC)
IO-Link: Parameter → Application → Sensor → Operating Mode (FUNC)
Enables the desired behavior of output 2 (not IO-Link output)
Options:
• OFF
• 4-20 mA (I) ((can only be selected if the device has been ordered with 4-20mA))
• DC-PNP (PNP)
Ceraphant PTC31B, PTP31B, PTP33B IO-Link
Output
Closing
NC contact
Closing
NC contact
Abbreviation for
operation
HNO
HNC
FNO
FNC
Endress+Hauser