Omron 3G3AX-MX2-PRT-E User Manual page 44

Accessing Parameters
4-5-1-2 Accessing Inverter Parameters
Step 1
Step 2
30
Table 45 Parameter Processing Message Area-Initiate Reset
Output area [hex] 2
Word offset
Function
Input area [hex]
The Option Board correctly executes the task and resets before responding.
After the PROFIBUS master has re-connected, the Option Board tries to exe-
cute the task a second time. The task fails because parameter 972 may only
be set to 1 if the current value is 2.
When you address Inverter parameters, IND is used to select the parameter
group.
Table 46 IND Values and Parameter Groups for Parameter Processing
Parameter
A@@@
b@@@
PNU represents the parameter number in that group. To address P160 for
example set IND=10h (P@@@) and PNU=0A0h (160).
Note It is important to use array tasks (6, 7 or 8) when accessing Inverter parame-
ters. IND is only interpreted if the Option Board executes an array task.
The following example demonstrates how to use the parameter process mes-
sage area to access Inverter Parameters:
Reading an Inverter parameter: To read Inverter parameter P180 (PROFI-
BUS node address):
Table 47 Parameter Processing Message Area-Reading P180
Output area [hex] 6
Word offset
Function
Input area [hex]
Changing an Inverter parameter: To change Inverter parameter A001 (Fre-
quency source) to 3 (Modbus):
Change WORD parameter value task
Parameter number 972
3CC 00
+0
AK PNU IND
7 3CC 00
Task failed (Parameter) response
Error: Not allowed due to operating state
IND Parameter IND
01h C@@@ 03h
02h d@@@ 04h
Read element value in array task
Parameter number 180
0B4 10
+0
AK PNU IND
4 0B4 10
Task success (WORD element) response
Read value: PROFIBUS node address
00 0000
+1 +2
- PWE
00 0000
Parameter IND Parameter
F@@@ 06h P@@@
H@@@ 08h U@@@
Parameter group P@@@
00 0000
+1 +2
- PWE
00 0000
Section 4-5
Write
0001
+3
0011
IND
10h
15h
0000
+3
0003