T H E M O D E R M - B U S T E C H N O L O Y
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2.2
Indications
The description of the different leds is in the front. By using the leds it is easy to simply follow
the traffic from different M-Bus clients and how the traffic moves via the masterport and the
meters.
Figure 2-3
The function of the leds is described in the table below:
Table 2-1
Row 1
Description
Row 2
Description
Pwr
Power led is red when normal.
Flashes red and green at the startup.
This usually takes 10 seconds from that
the power is turned on.
Flashes red at a fast rate when there is
a short circuit on the M-Bus loop.
Flashes slowly orange when the loop is
overloaded.
Flashes slowly orange when the license
key is not installed.
C1
No function in existing version
C2
Modbus2MBus (Tx)
C3
Modbus2MBus (Rx)
M (Tx)
Flashes when the Master port sends
data
M (Rx)
Flashes when the Master port receives
data
P1 (Rx)
Flashes when Slave port 1 receives data
P1 (Tx)
Flashes when Slave port 1 sends data
P2 (Rx)
Flashes when Slave port 2 receives data
P2 (Tx)
Flashes when Slave port 2 sends data
P3 (Rx)
Flashes when Slave port 3 receives data
P3 (Tx)
Flashes when Slave port 3 sends data
P4 (Rx)
Flashes when Slave port 4 receives data
P4 (Tx)
Flashes when Slave port 4 sends data