Handling Of The Objects; Parameter Access Via Communication Channel Pkw - BONFIGLIOLI Vectron ACTIVE CUBE Manual

13 Handling of the objects

13.1
The communication channel (PKW area) has the following structure:
Designation
Content
Byte No.
The data is transmitted in the Motorola format as, for example, supported by the S7
PLC from Siemens. Thus, the high byte is on the lower byte of the telegram and the
low byte on the higher byte.
Note:
PKE
Bit
AK:
SPM:
PNU:
•
•
•
Parameter values (= data) of the type Integer/Unsigned Integer (16 Bit) and Long (32
Bit) can be written and read. The data type is specificied in the request identification.
In data set change-over capable parameters (array), the required data set is stated in
the Index Byte (Byte 2).
Note:
Note:
08/08
08/08

Parameter access via communication channel PKW

PKE
Parameter
identification
High Low
Byte Byte
0 1
The data set is always on the high byte of "Index" (data set/Byte No. 2).
If the System bus function is available (EM-module with Systembus) a
Systembus address is set on the low byte of "Index" (SB/Byte No. 3). With
the help of this parameter the access to a Systembus subscriber is possi-
ble. For details see the Systembus manual.
Structure of the parameter identification (PKE):
High Byte
15 14 13 12
AK SPM
Request or reply identification (value range 0 ..15)
Toggle bit for spontaneous result processing
Parameter number (value range 1 to 1599)
The request and reply identifications are stored in the AK area. If no parameter
processing is to be carried out, the "no request" type of function is to be set.
With bit 11 (SPM), the readiness for spontaneous report processing can be
switched on and off (0 = OFF, 1 = ON, in the present application, the spontane-
ous report processing is not supported, so SPM is always 0).
The PNU area transmits the number of the parameter to be processed.
An Excel file, which is available on request, exists for the necessary infor-
mation on the parameters with regards to the data type and data set
change-over capability.
To obtain access to the PKW object on a S7 PLC the functions SFC14/15
must be used.
CM-PDPV1
PKW Area
IND
Index Parameter value
High-Word
High Low High
Byte Byte Byte
data set SB
2 3
11 10 9 8 7
CM-PDPV1
PWE-high PWE-low
Parameter value
Low-Word
Low High
Byte Byte
4 5 6
Low Byte
6 5 4 3 2
PNU
Low
Byte
7
1 0
21
21