Introduction To The Devicenet Module; Devicenet Terminology; Data Types - YASKAWA SGD7S Product Manual

1.2 Introduction to the DeviceNet Module

1.2.1 DeviceNet Terminology

1.2

Introduction to the DeviceNet Module

Note
You can attach the DeviceNet Module to a Command Option Attachable-Type SERVOPACK to
use the SERVOPACK as a slave in DeviceNet communications.*
This will allow you to send positioning references and origin return commands from the host
device that functions as the DeviceNet master.
There are two models of DeviceNet Modules. Each has a different power supply method.
• DeviceNet Module driven by control power supply: Power is supplied to this DeviceNet Mod-
ule from the control power supply of the SERVOPACK.
• DeviceNet Module driven by external power supply: Power is supplied to this DeviceNet
Module from the communications power supply on the DeviceNet communications cable.
*
DeviceNet communications are used worldwide as a global standard for FA field network communications. Devi-
ceNet communications allow you to easily communicate between a wide range of devices from different vendors.
1.2.1

DeviceNet Terminology

The following table lists the DeviceNet terms that are used in this manual.
ODVA
CAN
CCW
CW
I/O communications
Explicit message
communications
1.2.2

Data Types

The following table describes the data types that are used in this manual.
BOOL
USINT
UINT
UDINT
INT
DINT
WORD
STRING
*
The data size depends on the length of the text string.
1-4
A DeviceNet Module can be attached only to a Command Option Attachable-Type SERVOPACK.
Term
Open DeviceNet Vendor Association: This vendor association was established to
promote DeviceNet, a CAN field network.
Controller Area Network: The CAN protocol was created by the ISO to standard-
ize serial communications.
Counterclockwise.
Clockwise.
One of the communications methods that is used for DeviceNet communica-
tions. Data is sent and received cyclically with relatively high priority.
One of the communications methods that is used for DeviceNet communica-
tions. You can change or read attributes, but priority is relatively low.
Data Type
Boolean data, which has one of two logical values, TRUE or FALSE
Unsigned 8-bit integer
Unsigned 16-bit integer
Unsigned 32-bit integer
Signed 16-bit integer
Signed 32-bit integer
16-bit bit string
Text string of single-byte characters*
Meaning
Description