Steca coolcept StecaGrid 1500, Installation And Operating Instruction

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The external data logger (at the start of the data connection)
must be terminated according to the manufacturer's
specifications.
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The last inverter (at the end of the data connection) is
terminated by plugging the optionally available termination
plug into the free RJ45 socket (for RS485 bus) (see table in
Ä Chapter 2.2 ‘Identification’ on page 6 under 'Optional
accessories').
3.6.6 RS485 addressing
Every inverter must be assigned its own unique address for
communication between the bus master and the slaves.
Every inverter is set with an address of 1 at the factory. This means
that the addresses must be adjusted in systems having more than 1
inverter. The following applies:
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The address is changed at the inverter via the menu items
‘Settings’
▶
‘Address’ .
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Only addresses ranging from 1 – 99 may be set.
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The bus master devices usually support less than 99 addresses.
Consult the respective operating instructions for these devices
before setting the addresses of the inverters.
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We recommend starting with address 1 for the first inverter on
the bus and then incrementing the address by 1 for each
subsequent inverter on the bus, in the same order as they are
physically installed. This makes it easier to identify the relevant
inverters when their address is displayed in messages shown on
the remote display.
3.6.7 Modbus RTU
The inverter communicates via Modbus RTU with energy meters. The
following applies:
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Only energy meter pre-programmed in the inverter can be used.
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The energy meter must measure the supply from the grid in
positive direction. Follow the manufacturer's instructions.
3.6.8 Modbus RTU data connection cable
NOTICE!
Material damage from electrical current! The
alternative data connection cable may only be
manufactured by technical professionals.
On the inverter side, a 4-pole telephone cable with RJ10 connector
may be used as data connection cable.
EN
747,431 | Z09.2 | 18/02/2016 29