41
Accessing Parameters
Section 4-5
3.
Set AK to the desired task.
The parameter processing message mailbox is triggered by a change in the
parameter processing output area. By first setting AK=0, you avoid uninten-
tionally starting a write task when you start changing PNU, IND and PWE.
4-5-1-1
Accessing Option Board Parameters
Option Board parameters are addressed by writing the parameter number to
PNU (Refer to
APPENDIX F Option Board Parameters
for a list of the avail-
able Option Board parameters). If you are addressing an element in an Option
Board parameter array, you must also write the element index to IND. When
writing an Option Board parameter, the task number specifies the write size.
The following example demonstrates how to use the parameter process mes-
sage area to access Option Board parameters:
Step 1
Reading an Option Board Parameter:
To read Option Board parameter 965
(Unit profile code): First set PNU and then AK as illustrated below. The Option
Board will respond with the illustrated values.
Step 2
Reading an Option Board array element:
To read Option Board parameter
element 915.3 (Modbus address mapped into PZD3): Set PNU=393h (915
dec), AK=6 and IND=3.
Step 3
Changing an Option Board array element:
To change Option Board param-
eter element 915.3 (Modbus address mapped into PZD3) to 1F01h (Coil data
0):
Table 41 Parameter Processing Message Area-Reading PNU965
Read parameter value task
Parameter number 965
Output area [hex]
1
3C5
00
00
0000
0000
Word offset
+0
+1
+2
+3
Function
AK
PNU
IND
-
PWE
Input area [hex]
1
3C5
00
00
0000
0302
Task success (WORD parameter) response
Read value (The unit profile code)
Table 42 Parameter Processing Message Area-Reading PNU915.3
Read element value in array task
Parameter number 915
Element at index 3
Output area [hex]
6
393
03
00
0000
0000
Word offset
+0
+1
+2
+3
Function
AK
PNU
IND
-
PWE
Input area [hex]
4
393
03
00
0000
0000
Task success (WORD element) response
Read value (Modbus address mapped into PZD3)
Table 43 Parameter Processing Message Area-Changing PNU915.3
Change WORD element value in array task
Write value
Parameter number 915
Element at index 3
Output area [hex]
7
393
03
00
0000
1F01
Word offset
+0
+1
+2
+3
Function
AK
PNU
IND
-
PWE
Input area [hex]
4
393
03
00
0000
0000
Task success (WORD element) response
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Страница 1: ...MX2 RX PROFIBUS Option Board Model 3G3AX MX2 PRT E 3G3AX RX PRT E USER S Manual Cat No I111E EN 02...
Страница 6: ...vi...
Страница 14: ...xiv Compliance with EC Directives...
Страница 20: ...6 Introduction to PROFIBUS Section 1 3...
Страница 36: ...22 How to mount the Option Board on the Inverter Section 2 3...
Страница 42: ...28 Configuring the Network Section 3 2...
Страница 70: ...56 Limitations Caused by Inverter Mode and Rating Selection Section 4 7...
Страница 108: ...94 APPENDIX G...
Страница 110: ...96 APPENDIX H...
Страница 113: ...97...
Страница 115: ......