Common Industrial Objects implemented by vacon® 100 family vacon • 53
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7
The VACON® 100 Family AC drives also support an old method from the OPTCQ option board of
reading/writing ID values when the PLC supports only 8 bit instance attributes. This method is bit
more complex.
In this mode, set the instance number to high octet of the ID, and the instance attribute as low octet
of the ID. For example, if you want to read the value of ID 2291
d
(08F3
h
), the Get_Attribute_Single
service request is targeted at the Vendor Parameters class, instance 08
h
and attribute F3
h
.
7.3.1.2
Services
Instance Service “Get_Attribute_Single”
When invoked in an instance, the parameter ID to be fetched from the drive is calculated, then the
read operation is started and once available, a response is provided to the master.
The format of the message is as follows:
The old format of the message is as follows (OPTCQ option board):
Instance Service “Set_Attribute_Single”
When invoked in an instance, the parameter ID to be modified in the drive is calculated. The data
type, write permission etc. are verified before the write operation is started. When the operation
finishes, or if an error occurs, an appropriate response is provided to the master.
The format of the message is as follows:
Table 37.
Field Data
Service Code
0E
h
Class Code
A0
h
Instance Number
01
h
Attribute ID
XXXX
h
Table 38.
Field Data
Service Code
0E
h
Class Code
A0
h
Instance Number
YY
h
Attribute ID
XX
h
Table 39.
Field Data
Service Code
10
h
Class Code
A0
h
Instance Number
01
h
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