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Proline Promass 84 MODBUS RS485
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Endress+Hauser
5.7.2
Configuring the device address
The device address must always be configured for a MODBUS slave. The valid device addresses are
in a range from 1 to 247. In a MODBUS RS485 network, each address can only be assigned once.
If an address is not configured correctly, the device is not recognized by the MODBUS master. All
measuring devices are delivered from the factory with the device address 247 and with the
"software addressing" address mode.
Addressing via local operation
More detailed explanations for addressing the measuring device via the local display → ä 61.
Addressing via miniature switches
Warning!
Risk of electric shock. Exposed components carry dangerous voltages. Make sure that the power
supply is switched off before you remove the cover of the electronics compartment.
1.
Loosen the Allen screw (3 mm) of the securing clamp.
2.
Unscrew cover of the electronics compartment from the transmitter housing.
3.
Remove the local display (if present) by loosening the set screws of the display module.
4.
Set the position of the miniature switches on the I/O board using a sharp pointed object.
5.
Installation is the reverse of the removal procedure.
Fig. 34:
Addressing with the aid of miniature switches on the I/O board
a
Miniature switches for setting the device address (illustrated: 1 + 16 + 32 = device address 49)
b
Miniature switches for the address mode (method of addressing)
– OFF = software addressing via local operation (factory setting)
– ON = hardware addressing via miniature switches
c
Miniature switches not assigned
2
1
2
3
4
1
2
3
4
1
3
2
3
4
4
2
3
4
1
1
2
3
4
1
2
3
2
4
1
2
3
4
3
4
Operation
OFF ON
1
1
2
4
8
a
1
16
32
64
128
b
c
OFF ON
a0004391
49
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