WIKA D-11-9 Benutzerhandbuch
Seite 7
2450786.06 GB/D 10/2010
12 WIKA Operating instructions/Betriebsanleitung D-10-9, D-11-9
2450786.06 GB/D 10/2010
13
WIKA Operating instructions/Betriebsanleitung D-10-9, D-11-9
octet number
1.
2.
3.
4.
INTEGER32
b
7
..b
0
b
15
..b
8
b
23
..b
16
b
31
..b
24
ID
DLC
Byte 1
Byte 2
Byte 3
Byte 4
Indentifier
4
process value
7. Starting, operation
GB
Change of the PDO-mapping:
Procedure:
- The device has to be in the PRE-OPERATIONAL mode
- Deactivate currently mapped object by writing 0 to object 1A00h subindex 0
(mapping is deactivated, PDO does not supply any data; DLC = 0)
- Write desired object to subindex 1 of object 1A00h
(pressure value 9130 01 20h / temperature value 9130 02 20h)
- Finally the mapping has to be reactivated
The structure of the synchronous and asynchronous PDO is identical.
The identifier of the PDO can be set via object 1800h.
Factory-set: 180h + NID
Byte 1 to byte 4 contain the currently configured process value.
The coding corresponds to DS 301, chapter 9.1.4.5.
Here default settings byte 1 is the least and byte 4 the most significant byte.
Factory-set: Object 91 30 01
The following INTEGER data types are used.
Telegram structure PDO
PDO-Structure
Object Directory Description of the Device-Specific Profile
Input Scaling
7120h AI_Input_Scaling_1_FV
7122h AI_Input_Scaling_2_FV
9121h AI_Input_Scaling_1_PV (MBA (lower limit of range) in the unit Pa, e.g. 0)
9123h AI_Input_Scaling_2_PV (MBE (upper limit of range) in the unit Pa, e.g. 1600000)
Objects 7120h and 7122h are ReadOnly. The calibration is carried out via objects 9121h and
9123h.
The device is recalibrated by addressing 2 measuring points and sending the respective set
values to the device. The device offsets the set value specified against the actual pressure
value. The 2 measuring points ideally correspond to MBA (lower limit of range) and MBE
(upper limit of range), which, however, might not be possible in each case (e.g. -1 .. x bar).
7. Starting, operation
GB
X
X
Calibration Point 2
Calibration Point 1
Al_Input_Scaling_1-FV
Al_Input_Scaling_2-FV
Al_Input_Scaling_1_PV
Al_Input_Scaling_2_PV
Following Object Directories see page 53 - 60:
Communication Profile Area, Manufacturers Specific Profile Area, Device Profile Area,
Description of Manufacturer Specific Profile and Description of Communication Profile