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DVP-ES2-EX2-SS2-SA2-SX2-Operation Manual

DVP-ES2-EX2-SS2-SA2-SX2-Operation Manual

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<strong>DVP</strong>-<strong>ES2</strong>/<strong>EX2</strong>/<strong>SS2</strong>/<strong>SA2</strong>/<strong>SX2</strong>/SE <strong>Operation</strong> <strong>Manual</strong> - Programming<br />

7.2.2 The Profile<br />

7.2.3 The CAN Interface and the Network Topology<br />

‣ The pins of COM3 (CAN interface)<br />

Pin<br />

CAN+<br />

CAN-<br />

Description<br />

CAN-H<br />

CAN-L<br />

White (CAN_H)<br />

Blue (CAN_L)<br />

Black(SG)<br />

CAN+<br />

CAN-<br />

SG<br />

D+<br />

D-<br />

SG<br />

Signal<br />

ground<br />

Tighten it with a slotted<br />

screwdriver.<br />

‣ The CAN signal and the data frame format<br />

The CAN signal is a differential signal. The voltage of the signal is the voltage difference between<br />

CAN+ and CAN-. The voltage of CAN+ and that of CAN- take SG as a reference point. The CAN<br />

network can be in two states. One is a dominant level, and is indicated by the logical “0”. The other<br />

is a recessive level, and is indicated by the logical “1”. The CAN signal level is shown below.<br />

Recessive<br />

Dominant<br />

The data frame format is shown below. The CAN nodes transmit the CAN messages to the network<br />

from left to right, as the data frame format below shows.<br />

7-4

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