Troubleshooting
34 (46)
7.3
Meter Reading Errors
No meters are detected
A scan has been completed but none of the connected meters appear in the meter list.
1.
Check the cable between the gateway and the meter and replace faulty cables.
2.
Check that the voltage between terminals
MBUS+
and
MBUS-
is ~36 VDC.
3.
Check that the M-Bus interface (M-Bus mode) is enabled in the Configuration tab.
4.
Check that the connected meters support configured search mode (primary or secondary).
5.
Try searching for meters gradually by limiting the address space (
Primary start address
)
or by using a search mask (
Secondary address mask
).
6.
Try different settings of
M-Bus request mode
and
M-Bus reset mode
.
7.
Try a different
M-Bus baud rate
(300, 2400 or 9600), or a higher
MBus timeout
value.
8.
If possible, disconnect the meters one by one to eliminate a possible source of error.
9.
Connect another M-Bus meter (if available) and repeat the communication test with this
meter in order to locate the source of error.
10. Increase the system parameter
MBUS_MAXRETRY
from the default value.
See
Configuration Files, p. 39
.
Meters that do not respond to every request will be found easier by increasing the number
of retries the gateway makes.
Some meters are not detected
A scan has been completed but some of the connected meters do not appear in the meter list.
1.
Perform the scan both as a primary scan and a secondary scan, as not every meter
supports both methods.
2.
Try searching for meters gradually by limiting the address space (
Primary start address
)
or by using a search mask (
Secondary address mask
).
3.
If possible, disconnect the meters one by one to eliminate a possible source of error.
4.
Connect another M-Bus meter (if available) and repeat the communication test with this
meter in order to locate the source of error.
5.
Increase the system parameter
MBUS_MAXRETRY
from the default value.
See
Configuration Files, p. 39
.
Meters that do not respond to every request will be found easier by increasing the number
of retries the gateway makes.
M-Bus to Modbus-TCP Gateway User Manual
SCM-1202-0096-EN 2.1
