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8. MAINTENANCE
80703B_MHW_2850T/3850T_02-2019_ENG
8.5.2. System signals
Any controller malfunctions will be signalled using appropriate variables or system alarms, indicating the type of problem
identified in appropriate messages. The table below lists these messages, possible causes and possible remedies to apply.
Error message
Description
Possible causes
Possible solutions
PROBE FAULT
The signal from
the probe does not
arrive or the signal
level is not the one
expected.
Probe not connected.
Check the connection between the
probe and I/O module
Probe signal out of range.
Verify that the type of probe connected
corresponds to that configured in the
controller
Probe fault.
Replace the probe
COMMUNICATION
FAULT
No communica-
tion between the
panel and the I/O
modules.
Communication cable not connected.
Check the connection between panel
and F-GCANs. Replace the cable if
necessary
No F-GCANs module power.
Check the F-GCANs module power
(the PWR power LED should be on).
No I/O module power.
Check I/O module power (the yellow
LED 1 should be on).
F-GCANs module address incorrect.
Verify the F-GCANs module CAN Bus
address.
SIMULATION
ACTIVE
Warning that
SIMULATOR mode
is on.
Operation with SIMULATOR on.
Disable SIMULATOR if not required.
MEMORY FREE
SPACE WARNING
Free local memory
is lower than the
default limit (free
memory less than
5 MB).
Archive files in local memory have not
been deleted or moved.
Delete or move record archive files.
Delete any excess image files.
MEMORY FULL
ERROR
Local memory
almost full (less
than 2 MB of free
memory).
Archive files in local memory have not
been deleted or moved.
Delete or move record archive files.
Delete any excess image files.
SD CARD NOT
PRESENT
The SD card is not
present.
The controller is equipped with the
SD Card option but the SD card is not
installed.
Install the SD card.
The SD card is installed but is not for-
matted or is formatted incorrectly.
Format the SD card (FAT32 formatting).
SD FREE SPACE
WARNING
Free SD card mem-
ory is lower than
the default limit
(free memory less
than 5 MB).
Archive files on the SD card have not
been deleted or moved.
Delete or move record archive files.
Replace the SD card with a new, for-
matted, and empty one.
SD FULL ERROR
The SD card mem-
ory is almost full
(free memory less
than 2 MB).
Archive files on the SD card have not
been deleted or moved.
Delete or move record archive files.
Replace the SD card with a new, for-
matted, and empty one.
Warning!
The SD card must be put in while the instrument is turned off. Taking out the SD card while the control-
ler is in operation will result in loss of the batch files or datalog under way
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