Kippzonen COMBILOG Data Logger Manuale Utente Scaricare il pdf (Pagina 97)

10.9 Potential Equalization

The difference between the actual physical voltage potentials

DGND of all connections with the bus must not exceed ±7 Volt.

If this cannot be guaranteed, an equalization has to be

provided. For most of the connections this means that the

minus connection of the power supply has to be fed-through as

a compensating line from connection to connection.

10.10 Adjustment of Address and Baud Rate

Before a control unit (PLC) or a computer (PC) can interchange

data with a data logger via the bus, address and baud rate for

the data logger have to be defined. Following hints have to be

considered:

 All devices have to be adjusted to the same baud rate.

 Within the bus topology the same address must not ap-

pear twice.

bus parameter ASCII-protocol /

MODBUS-Protocol

PROFIBUS-protocol

address 1 ..... 127 1 ..... 126

2,400 bps -

baud rate 4,800 bps -

9,600 bps 9,600 bps

19,200 bps 19,200 bps

38,400 bps -

Table 10.3 Setting variants for address and baud rate

for the data logger COMBILOG 1022

Hardware Manual COMBILOG 1022

1 2 ... 92 93 94 95 96 97 98 99 100 101 102 ... 172 173

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Kippzonen COMBILOG Data Logger Manuale Utente Pagina 97