11.3.4 Meaning of error codes
11.3.4.1 1 Remaining control deviation
The deviation between the setpoint and the actual value is continuously monitored in
"Automatic" mode. The fault message for a remaining control deviation is activated depending
on the setting of the application parameters "
TIM" - monitoring time for setting the fault
messages - and " LIM" - response threshold for the fault message. The fault message is
cancelled as soon as the control deviation drops below the response threshold. This monitoring
function is always active.
11.3.4.2 2 Device not in "Automatic" mode
When the device is not in automatic mode, an error message is generated if the ' FCT'
parameter (function of fault message output) is set correctly. A warning is then sent to the
control system if the device was switched to manual or configuration mode on-site.
11.3.4.3 3 digital inputs BIN1 or BIN2 active
If the digital input is activated, a fault message is generated when the ' FCT' and 'BIN1'
parameters are set accordingly. A fault message can be generated, for example, by a switch to
monitor the packing glands, a temperature switch or a limit switch (e.g. for pressure).
Configure the digital input BIN2 on the Digital I/O Module (DIO) in the same way.
11.3.4.4 4 Monitoring the number of total strokes
The diagnostics value "1 STRKS" is constantly compared with the thresholds that are
determined from the "L1.LIMIT" to "L4.FACT3" parameters. If the thresholds are exceeded, the
fault message output or the digital outputs A1 and A2 respond, depending on the operating
mode of the extended diagnostics . These two functions can be deactivated using the
parameter setting "OFF" for "L. STRK".
11.3.4.5 5 Monitoring the number of changes in direction
The diagnostics value "2 CHDIR" is constantly compared with the thresholds that are
determined from the "O1.LIMIT" to "O4.FACT3" parameters. If the thresholds are exceeded,
the fault message output or the digital outputs A1 and A2 respond, depending on the operating
mode of the extended diagnostics . These two functions can be deactivated using the
parameter setting "OFF" for "O. DCHG".
11.3.4.6 6 Monitoring the lower endstop / 7 Monitoring the upper endstop
If the parameter "F. ZERO" is set to "ON", monitoring of the lower endstop is activated. This
function can be used to detect the errors in the process valve. An overshot limit indicates the
possibility of deposits or foreign bodies in the process valve. If the value falls below the limit, this
indicates wear of the process valve or restrictor body. A mechanical misalignment of the
position feedback also triggers this fault message.
Diagnostics and troubleshooting
11.3 Online diagnostics
SIPART PS2 with 4 to 20 mA/HART
232 Operating Instructions, 11/2019, A5E00074631-AE
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