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3. Operation
PROFIBUS DP
Test Environment
RC520 Controller: Pentium III 850 MHz 128 MB memory
Fieldbus I/O: PCI-DPIO board Master (station address: 0)
Baud rate: 12 Mbps, 9.6 kbps
Connected Slave: Woodhead 16-inpout module (TDP-8C0-B18-02)
Node address: 2
Connection Image
Terminatin
g
Resisto
r
To Standard Input
Waveform
Generator
Power Supply
+24V
NPN Output
PNP Output
W
ave
f
orm
modification jig
PROFIBUS
I/F Board
Input Module
D-Sub
Evaluation
Signals with various pulse widths (every 5 msec) were input to the standard
I/O input and the input module of the fieldbus I/O at 1 Hz. For 10 minutes
(600 seconds), pulse widths of the received signals were measured at 12
Mbps and 9.6 kbps.
Result
12 Mbps: The input devices responded to 25-msec pulse.
9.6 kbps: The input devices responded to 80-msec pulse.
Fieldbus I/O Rev.6 75