Reading And Changing Attributes; Devicenet Data Management - YASKAWA SGD7S Product Manual

13.5

Reading and Changing Attributes

13.5.1

DeviceNet Data Management

In DeviceNet, all parameters and command blocks are managed as objects, instances, and
attributes. The following diagram illustrates this.
Position Controller
object (0x25)
Controller Parameter
object (0x64)
SERVOPACKs have the following objects.
Object Name
Identity
Message Router
DeviceNet
Assembly
Connection
Position Controller
Supervisor
Position Controller
Block Sequencer
Command Block
Control Parameter
SERVOPACK
parameter
Instances of objects have attributes. The attributes hold the settings and status of the SERVO-
PACK. To read or change an attribute via DeviceNet, specify the class ID, instance ID, and attri-
bute ID.
For example, when reading a Current Position attribute, which holds the current position, spec-
ify the attribute as follows:
Position Controller Object
• Class: 0x25
• Instance ID: 1
• Attribute ID: 13
Command Block objects (0x27)
Instance 2
Instance
1 Manages the device type and serial number.
1 Distributes explicit messages to other objects.
1 Manages the physical connection to DeviceNet.
1 Manages response messages.
2 Manages command messages.
1 Manages explicit messages.
2 Manages polled I/O messages.
1 Manages command assembly codes and response assembly codes.
1 Manages motion parameters.
1 Manages command blocks.
1 to 255 Stores a command block.
1 Manages detailed motion parameters.
1 Manages SERVOPACK parameters.
13.5 Reading and Changing Attributes
13.5.1 DeviceNet Data Management
Object (0x27)
Instance 1
Instance: 1
Attribute: 1
Attribute 1
Attribute 2
Function
13
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