Liquistation CSF48 Diagnostics and troubleshooting
Endress+Hauser 197
11.6.2 Sensor-specific diagnostics messages
See Operating Instructions for "Memosens", BA01245C
969 Modbus Watchdog S Off Off The device did not receive a Modbus telegram
from the master within the specified time. The
status of Modbus process values received is set to
invalid.
970 Input Overload S On On Current input overloaded
The current input is switched off from 23 mA due
to overload and reactivated automatically when a
normal load is present.
971 Input low S On On Current input too low
At 4 to 20 mA, the input current is less than the
lower error current.
--> Check the input for short-circuits.
972 Input > 20 mA S On On Current output range exceeded
973 Input < 4 mA S On On Current output range undershot
974 Diag. confirmed C Off Off User has acknowledged the message displayed in
the measuring menu.
975 Device reset C Off Off Device reset
976 PFM value high S On Off Pulse-frequency modulation: output signal
exceeded/undershot. Measured value outside the
specified range.
Reasons: sensor in air, air pockets in assembly,
incorrect flow to sensor, sensor fouled.
1. Clean sensor
2. Check plausibility
3. Adjust the PFM configuration.
977 PFM value low S On Off
978 ChemoCl.Failsafe S On On No feedback signal detected within the
configured period.
1. Check the application
2. Check the wiring
3. Extend the duration
990 Deviation limit F On On Redundancy: limit value of percentage deviation
exceeded
991 CO2 conc. range F On On CO
2
concentration (degassed conductivity)
outside the measuring range
992 pH calc range F On On pH calculation outside the measuring range
993 rH calc range F On On rH calculation outside the measuring range
994 Dual cond range F On On Dual conductivity outside the measuring range
No. Message Factory settings Tests or remedial measures
Cat. Diag.
on/off
Error
current
To Next Page
Loading...
