Endress+Hauser Cerabar S PMP71 with MID Part Certificate - Page 47

Cerabar S PMP71 with 4 to 20 mA HART Troubleshooting
Endress+Hauser 47
8.2.1 Configuring current output for an alarm
You can configure the current output for the event of an alarm by means of the OUTPUT FAIL
MODE, ALT. CURR. OUTPUT and SET MAX. ALARM parameters. These parameters are displayed
in the OUTPUT group (menu path: (GROUP SELECTION →) OPERATING MENU → OUTPUT).
In the event of an alarm, the current and the bar graph assume the value entered with the OUTPUT
FAIL MODE parameter.
P01-xxxxxxxx-05
Fig. 22: Current output in the event of an alarm
Options:
1 Max. alarm (110%): can be set between 21 and 23 mA via the SET MAX. ALARM parameter
2 Hold meas. value: last measured value is kept
3 Min. alarm (–10%): 3.6 mA
Factory setting:
• OUTPUT FAIL MODE = max. alarm (110%)
• SET MAX. ALARM = 22 mA
Use the ALT. CURR. OUTPUT parameter to set the current output value for the error messages
E 120 "Sensor low pressure" and E 115 "Sensor overpressure". You have the following options:
• Normal: the current output assumes the value set via the OUTPUT FAIL MODE and SET MAX.
ALARM parameters.
• NAMUR
– Lower sensor limit undershot (E 120 "Sensor low pressure"): 3.6 mA
– Upper sensor limit overshot (E 115 "Sensor overpressure"): current output assumes the value
set via the SET MAX ALARM parameter.
Factory setting:
ALT. CURR. OUTPUT: normal
t
I
max.
min.
➀
➂
➁
3.6 mA
21...23 mA