12.3 Troubleshooting
12.3.1 Troubleshooting Functional Security
Below you can find explanations on how to correct problems when enabling Functional Safety.
Information mes‐
sage on the dis‐
play
Cause of error Remedy
INVALID CFG
ACCES
Write protection via user PIN disabled. Activate write protection via the user PIN.
Enable user PIN (Page 134)
INVALID CFG
TRNFK
Wrong characteristic curves selected. Select one of the following characteristic curves:
● Linear, proportional to pressure (PRESS).
● Linear, proportional to level (LEVEL).
● Proportional to flow rate, two-step linear up to the
application point (VSLN2 or MSLN2).
INVALID CFG
LOOPT
Loop current fixed. Loop test or multidrop
mode are enabled.
To return to normal operation, disable the loop test or
multidrop mode.
Loop test [31] (Page 137)
INVALID CFG
SIMUL
Device in simulation mode: Pressure meas‐
ured value is simulated.
Disable simulation to return to normal operation.
Simulate constant pressure values (Page 144)
INVALID CFG
STSIM
Device in simulation mode: Diagnostics are si‐
mulated.
Disable simulation to return to normal operation.
Simulate diagnostics (Page 145)
INVALID CFG
PARAM
Factory settings for Functional Safety are faul‐
ty.
Replace the device.
Diagnostics and troubleshooting
12.3 Troubleshooting
SITRANS P320/P420 (mA/HART)
190 Operating Instructions, 06/2018, A5E44852162-AA
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