User Manual

3-20
3
Communicating with the GT-70A series
- DeviceNet Compatible Network Unit DL-DN1 User’s Manual (GT-70A) -
3-3 Explicit Messaging
The DeviceNet master u nit can issue explicit messages to the DL-DN1 for the
following purposes:
"Issuing a Motion Command to a Sensor Amplifier" (page 3-22)
"Reading settings or status" (page 3-23)
"Reading data with decimal point" (page 3-24)
"Writing settings or status" (page 3-24)
"Locking Sensor Amplifiers" (page 3-25)
The button operation of the sensor amplifier is locked for approximately 10
seconds after the end of eac
h of
the operations listed below. The screen
displays "COM-Lock" for 2 seconds while switching to the locked state or
when button operation is attempted during the locked state. The screen
displays "COM-Unlock" for 2 seconds while unlocking. However, the initial-
ization screen appears when an initialization reset is executed. The initial-
ization screen remains displayed if any of the following operations is
r
epeated.
• Motion command
• Writing a setting(s) or status
• Key locking
Shown below is the basic format used when the DeviceNet master unit issues a
command to the DL-DN1 and when the DL-DN1 responds to the DeviceNet master
unit, respectively.
The number of bytes used in the class ID, instance ID, and attribute ID may
vary depending on the master unit. The format examples in this manual
assume 2 byt
es for class ID, 2 bytes for instance ID, and 1 byte for a ttribute
ID. For details, refer to the ins truction manual of the master device.
Reference
Basic Formats of Explicit Messaging
DeviceNet master unit DL-DN1 Sensor amplifier
Receive
Receive
Send
Send
Response
Command
Node
address
Service
Code
Attribute
ID
When normal
When abnormal
Node
address
Node
address
Service
Code
Service
Code
ClassID
InstanceID
Service data
Response data
Response data
（
Error code
）
Received size
Received size
Reference