Now select the communications that will be used to communicate with the external analyser:
•
Ethernet
(Modbus/TCP),
•
RS-485
(Modbus RTU), is a configuration with devices in parallel, only for master devices.
•
Master
, only for slave devices.
In a configuration with devices in parallel, the load generation setpoints can be obtained in two
ways:
- Each device reads the consumption value individually, so each device should configure
an analyser.
- The master reads the consumption values and sends this information to the slave de-
vices. For this purpose, in each slave device, the Master device should be selected as
the one that communicates with the external analyser.
The fact that the RS-485 bus is used for master/slave communication results in the following
limitations:
- The slaves cannot query a external analyser via
RS-485
, only via
Ethernet
.
- If a master is to use the
RS-485
bus to communicate with an external analyser:
• The bus configuration must be
9600 - 8N1
• The external analyser’s address should be higher than the last address as-
signed to a slave
Ethernet (Modbus / TCP)
Set IP address and port of the external meter,
Figure 40:
Figure 40: Strategy setup( Ethernet)�
Click on
Next
to open the Modbus parameter setup screen,
Figure 42
.
37
Instruction Manual
CirPower Hyb 4k-48
