Handling Of The Objects; Parameter Access Via Communication Channel Pkw - BONFIGLIOLI Vectron Agile Series Communications Manual

Handling of the Objects

16 Handling of the Objects
This chapter describes the handling of the communication channels like i.e. Process data channel and
Parameter data channel.
16.1

Parameter Access via Communication Channel PKW

The communication channel (PKW area) has the following structure:
Designation
Content
identification
High
Byte
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: The data set is always on the high byte of "Index" (data set/Byte No. 2).
If the Systembus 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 possible. For details see the Systembus manual.
Structure of the Parameter Identification (PKE):
PKE
Bit 15 14
AK
AK: Request or reply identification (value range 0 ..15)
SPM: Toggle bit for spontaneous result processing
PNU: 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 spontaneous report processing is not supported, so SPM
is always 0).
The PNU area transmits the number of the parameter to be processed.
Parameter values (= data) of the type Integer/Unsigned Integer (16 Bit) and Long (32 Bit) can be
written and read. The data type is specified 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: An Excel file, which is available on request, exists for the necessary information on the
parameters with regards to the data type and data set change-over capability.
Note: To obtain access to the PKW object on a S7 PLC the functions SFC14/15 must be used.
06/2010
PKE
Parameter
Content
High
Byte
0 Byte 0 Byte
No. No.
High-Byte
13 12 11 10 9
SPM
Profibus DP V1 Agile
PKW Area
PKE
Parameter
identification
High
Byte
0 Byte
No.
Low-Byte
8 7 6 5 4
PNU
Content
High
Byte
0 Byte
No.
3 2 1 0
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