Epson EM07ZS1647F manual Fieldbus I/O Response Performance, DeviceNet

3. Operation

3.9 Fieldbus I/O Response Performance

As mentioned previously, respond times for fieldbus I/O can vary and depend on several factors. The values in this section are shown for reference not for guaranteed performance.

DeviceNet

Test Environment

RC520 Controller: Pentium III 850 MHz 128 MB memory

Fieldbus I/O:	PCI-DVNIO board Master (MAC ID: 0)
Baud rate:	500 kbps, 125 kbps

Connected Slave: Woodhead 16-input module (TDN-8C0-108)

Node address: 2

Connection Image

Power Tap

T-branch

Terminating

Resistor

DeviceNet I/F Board	Power Supply
	+24V

Evaluation

T-branch

Terminating

Resistor

Input	To Standard Input
	Waveform
Module
	Generator
	NPN Output
	PNP Output
	Waveform
	Modification Jig

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 125 kbps and 500 kbps.

Result

500kbps: The input devices responded to 25-msec pulse.

125kbps: The input devices responded to 30-msec pulse.

74 Fieldbus I/O Rev.6