Automatic control function programming manual ladder language

15.3 UNITE Requests Processed by the CNC Function
15.3.1 «READ-OBJECT» Request
Description
The READ-OBJECT request is used to read those objects accessible for read by the CNC server (See Sec. 15.2.2).
Request Format
Answer Format
Positive answer
Specifies read request
Identifies the family
to which the object(s)
to be read belong(s)
Address of the first
object in the family
Number of consecutive
objects to be read
in the family
Negative answer
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REQUEST CODE
(1 byte)
0x36
SEGMENT No.
(1 byte)
(See 15.2)
OBJECT-ADDRESS
(1 word)
QUANTITY
(1 word)
SENDER CATEGORY
(1 byte)
Not significant
SPECIFIC
(1 byte)
Not significant
Positive answer
code ANSWER CODE
SPECIFIC
(1 byte)
(1 byte)
Data table
0x66
Not significant
DATA
ANSWER CODE
(1 byte)
0xFD
REMARK If the quantity specified is such that the answer could contain more than 128 bytes,
the request is refused (negative acknowledgement).