VLT
®
AutomationDrive EtherNet/IP
MG.90.Jx.02 ver. 5
th
September 2007 – VLT is a registered Danfoss trademark
20
How to Control the FC 300
I/O Assembly Instances
I/O Assembly Instances are a number of defined process control objects with defined content
comprising control and status information.
Unlike DeviceNet it is possible to run with asymmetrical instances. E.g. 101/153 = 8 bytes/20 bytes.
It is not possible to mix instances across profiles, e.g. 20/100.
Assembly instances must consistent to the profile: ODVA or FC profile
The controlling instance can be read in par. 12-20
Control Instance.
The figure below shows the I/O Assembly Instance options for controlling and monitoring the FC 300
drive.
Profile
(par. 8-10)
Direction
Instance
(decimal)
Size
(bytes)
Data
20 4
CTW
(20)
REF
Originator -> Target
21 4
CTW
(21)
REF
70 4
ODVA
Target -> Originator
71 4
100 4
101 8
Originator -> Target
103 20
150 4
STW
(FC)
MAV
151 8
FC
Target -> Originator
153 20
