Omron 3G3AX-MX2-PRT-E User Manual page 52

Accessing Parameters
!Caution
4-5-2-5 Processing an Error Response
Table 68 DP-V1 Class 2 Write-Parameter Read Instruction Bad Parameter
Word offset
Description
REF RT DO
Message [hex]
data
[dec]
Request reference
Parameter read instruction
Table 69 DP-V1 Class 2 Read-Result of Read Instruction on Bad Parameter
Word offset
Description
Message [hex]
data
[dec]
Request reference
Parameter read error
DATA format = WORD
38
Do not access Inverter parameters while the Inverter is being re-initialized
(Refer to the MX2-A@ Inverter manual section 6-3). Accessing parameters
during a re-initialization will cause the Inverter to go into an undefined state.
When the Option Board is unable to execute one of the read parameter
instructions, it adds an error value to the result data. Reading parameters
A001, A166 and P033 for example:
+0 +1
Request Header
N
0A 01 01 03
10 1 1 3
3 parameters address to follow
st
1 Inverter attached to Option Board
+2 +3 +4
Parameter Address
PA CA PNU IND
10 00 03E9 0000
16 0 1001 0
Parameter A001
Non-array
Addressing a value
Has the following result:
+0 +1
Request Header
REF RT DO N
0A 81 01 03
10 129 1 3
st
1 Inverter attached to Option Board
+2 +3
Value
FMT CV DATA
42 01 0004
66 1 4
DATA format = Error no
A001
Note that the value of parameter A166 is replaced with an error value in the
result data. Inverter parameter A166 does not exist, so error number 0000h
(Bad parameter number) is returned. Note that the values of A001 and P033
are returned irrespective of other read errors.
Note If a read on one of the elements in an array fails, an error is returned on the
parameter. Successfully read elements can therefore not be returned.
+5 +6 +7
Parameter Address
PA CA PNU IND
10 00 048E 0000
16 0 1166 0
Parameter A166
Non-array
Addressing a value
3 error values to follow
+4 +5
Value
FMT CV DATA
44 01 0000
68 1 0
1 value
A166
Section 4-5
+8 +9
Parameter Address
PA CA PNU
10 00 3EA1
16 0 16033
Parameter P033
Non-array
Addressing a value
+6 +7
Value
FMT CV DATA
42 01 0302
66 1 770
DATA format = WORD
Bad parameter number
P033
+10
IND
0000
0