4. Troubleshooting (PROFIBUS DP)

4.2.3.5 Network Configuration and Specifications

(1)Maximum Cable Length

Check that the cables used on the network meet the following specifications.

Baud Rates

Max. Cable Length

12 Mbps

100 m

6 Mbps

100 m

3 Mbps

100 m

1500 kbps

200 m

500 kbps

400 m

187.5 kbps

1000 m

93.75 kbps

1200 m

19.2 kbps

1200 m

9.6 kbps

1200 m

(2)Terminating Resistor

Ensure that two terminating resistors are connected to both ends of the network. The terminating resistor should be connected as shown below.

 

VP (6)

 

390 Ω

Data Line B

RxD/TxD-P (3)

 

 

220 Ω

Data Line A

RxD/TxD-N (8)

 

 

390 Ω

 

DGND (5)

(3)Cable

The cables should meet the PROFIBUS specifications.

ItemProperty

Impedance

135 to 165

Capacity

< 30 pf/m

Loop resistance

110 /km

Wire diameter

0.64 mm

Core cross-section

> 0.34mm2

Fieldbus I/O Rev.6

135

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Image 147
Epson EM07ZS1647F manual Baud Rates Max. Cable Length, ItemProperty