Parameter Access Via The Dp-V1 Channel - BONFIGLIOLI Vectron ACTIVE CUBE Manual

13.2
The Profibus communication module CM-PDPV1 provides the possibility to use the
Profibus V1-channel. This is an alternative to the usage of the communication object
PKW in the data exchange object. The PKW object is always sent on the bus,
whether it is used or not, and therefore causes needless busload.
The V1 telegrams for parameter access are special Profibus telegrams that are sent
only when a parameter access is necessary. Contrary to the usage of the PKW ob-
ject, the V1 telegrams can access all types of parameters including string parame-
ters.
To be compatible to different types of Profibus master devices there are two differ-
ent methods included for the V1-channel. The behaviour of the CM-PDPV1 concern-
ing the different methods is set with
No.
329 DP-V1 Mode
Note:
The two different modes are necessary because V1 telegrams are handled differently
on the various Profibus master implementations.
The standard telegram addresses a device by its Profibus node ID and selects the
parameters by two 8 bit objects named
supports the direct setting of the Profibus node ID,
must be set to "1 – Standard" and the handling described for this setting must be
used.
A S7 PLC uses two special functions SFC52/53 for the V1-channel. These functions
do not offer an independent setting for node ID,
accomplished by the diagnostic address (with
be accessed. The only available and variable object for the PLC application is
(8 bit). If the Profibus master device does not support the setting of Profibus node
ID,
handling described for this setting is to be used.
For both types of DP-V1 Mode the parameter data to be read or written uses the
Motorola format. The number of bytes depends on the parameter data type.
Parameter data types and byte order
Byte 0
data type
content high byte
data type
content high byte
data type
content first char.
uint/int
long
string
08/08
08/08

Parameter access via the DP-V1 channel

Parameter
Description
Operation mode
1 - Standard
2 - S7 compatible
To get access to the V1-channel on a S7 PLC the functions SFC52/53
must be used.
index DP-V1 Mode
slot
and
1 2
uint/int
low byte
long
byte
= 2 bytes
= 4 bytes
= 1 ... 99 bytes
CM-PDPV1
DP-V1 Mode
329.
Min.
1
Function
Standard usage of V1 channel
S7 PLC usage of V1 channel
slot index
and
slot
slot
slot
always set to 0) of the device to
329 must be set to "2 – S7 compatible" and the
3 4 5
low
string
CM-PDPV1
Setting
Max. Fact. Sett.
2 2
. If the Profibus master device
index DP-V1 Mode
and
index
and . The addressing is
... .... max. 98
329
index
27
27