Messages
and Diagnosis
Error
No.
Operating messages
- Meaning
Description
checksum is incorrect). Re-transfer all data
records.
7
Number overflow
A number overflow occurred in the weight
calculation.
17 Limit for load cell signal exceeded or
undershot
The measurement is too high. Measure the
measurement voltage with a multimeter and
check the load cells. Check the set
characteristic value in DS3.
18 Wire break
The connection to the load cells has been
broken. Check the load cell connection.
19 ADC error
The AD converter had to be restarted due to
a fault.
20 Reboot after voltage recovery
Information about completed reboot only.
21 Reboot after firmware error
Information about completed reboot only.
22 No 24 V power supply
There is no 24 V supply voltage to the
module.
Table 7-2
List of operating messages
The operating messages are output to the SIMATIC interface as a byte. The
meaning of individual bits is summarized in the table below.
Bit
Range of Values / Meaning
0
1= Reboot due to RAM error
1
1= Restart because of a watchdog error or program fault
2
1= No 24 V power supply
3
1= Number overflow in weight calculation
4
1= Parameter error
5
1= AD converter at limit of measuring range
6
1= Minimum voltage undershot on sensor line
7
1= AD converter fault
Table 7-3
Message byte for operating messages
SIWAREX MS 7-41