Biddle Modbus Manual page 10

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I
NSTALLATION
2.4 Entering the Modbus node address
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For IndAC and NOZ :
2 2
Note:
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Only units with a control circuit board (type Auto)
can be connected in series to the Modbus system.
1. Lay a cable between the units.
2. Feed the cable into the electronic housings.
3. Connect the cable in the first unit to terminal block X382,
in accordance with the wiring diagram.
4. Connect the cable in the second unit to terminal block
X380, in accordance with the wiring diagram.
5. Repeat steps 1 to 4 inclusive for each unit that is to be
connected in series.
The default value for the Modbus node address is 1. Depend-
ing on the Modbus network, it may be necessary to change
this. This can be done via the dip switches on the control cir-
cuit board.
Note:
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Valid Modbus node address numbers are 1 – 247.
Note:
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The Modbus node address must be converted to an
8-digit code.
2.4.1 Determining the code
The dip switches are coded as follows:
1 2
DIP SWITCH
value (ON) 1 2
Determine the 8-digit code of the Modbus node address as
follows:
1. Divide the number by 2 over and over again until the result
is 0. After each division, note the residual value.
M / BAC
ODBUS
3 4 5 6 7
4 8 16 32 64
NET
8
128