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3.2.1.6.2 Read Drive Parameter
In this example is shown the reading of a Drive parameter; the cases of positive or
wrong reading are distinguished.
3.2.1.6.2.1 Read Drive Parameter Request
The data frame for the Drive parameter reading is composed as follows:
DATA
TYPE
Byte
See Note
1)
See Note
1)
1) Byte or Word depending on the type of allocation executed by the Master.
3.2.1.6.2.2 Read drive parameter - Reply OK
If the Drive parameter is read correctly, the response is:
DATA TYPE
Byte
Word
Byte 1)
Byte 1)
Byte 1)
Byte 1)
1) The number of bytes of the Value-field depends on the length of the Drive pa-
rameter; i.e. if the Drive parameter type is "Integer" the length of VALUE is 2 bytes.
3.2.1.6.2.3 Read drive parameter - Reply Error
If Drive parameter reading is rejected, the response is the following:
——————
SBI-DN
FIELD
VALUE
Service
32hex
Code
Class ID
66hex
Drive Parameter Index in
Instance
XXXX
ID
FIELD
VALUE
Service
32hex OR
Code
80hex
Result
0
XX
XX
VALUE
XX
XX
Interface Board DeviceNet
MEANING
Get Drive Parameter -
Object Specific Service.
Drive Parameter Access
Class Object.
format Lowbyte-High
byte.
dn375
MEANING
Get Drive Parameter
Reply code- Object
Specific Service.
Result field equal to zero
means reading correctly
executed.
Low byte-Low word drive
parameter value.
High byte-Low word drive
parameter value.
Low byte-High word drive
parameter value.
High byte-High word
drive parameter value.
dn380
——————
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