BONFIGLIOLI ACTIVE Manual page 14

Direction of transmission Slave
PKW
PZD
Consistency area
The statement of the consistency describes the parts of the object which must have
consistent contents. The consistency states are encrypted in the configuration data of
the GSD file and have effects on the possible access mechanisms on the part of the
DP master. In this way, the 8 bytes of the communication channel in a PLC of type
Siemens S7 can only be reached via the special functions SFC14 (DPRD_DAT) and
SFC15 (DPWR_DAT). The words of the process data channel are directly addressable
as periphery words (PEW, PAW).
PPO1
PPO2
PPO3
PPO4
•
•
•
Note:
Scan time
Regardless of the transmission speed on the Profibus, the scanning time of the in-
verter is a constant variable as a function of the object used.
PPO3
PPO1/2/4 32 ms
An update of the data between the frequency inverter and the Profibus side is done
with this scanning time.
12
12
communication channel
PKW area
PKE IND PWE
PWEh
Parameter identification value
Process data channel
communication channel
PKW area
PKE IND PWE
full length
communication channel
PKE IND PWEh PWEl
The communication channel in PPO1 and PPO2 is treated identically.
The process data channel PZD1 to PZD6 in PPO2 and PPO4 is firmly defined and
its contents cannot be altered.
The process data channel PZD2 in PPO1 and PPO3 can be altered as regards its
contents, controlled via the user-specific bits in the control word STW in the PZD1.
In the data transmission, the Motorola format is presupposed for the
position of Low/High byte front, as is also supported by a PLC of the type
Siemens S7. If the DP master supports the Intel format, Low/High byte
are to be swapped on the master side before transmission and after re-
ceipt.
16 ms
Master (IN)
PWE PZD 1 PZD 2
PWEl HIW
ZSW
ZSW = State word
PWE PZD 1 PZD 2
word word
PZD1 PZD2
process data channel
PZD area
PZD 3 PZD 4 PZD 5
VAL2 VAL3 VAL4
HIW = Main actual value
process data channel
PZD area
PZD 3 PZD 4 PZD 5
word word word
process data channel
PZD3 PZD4 PZD5
PZD 6
VAL5
PZD 6
word
PZD6
06/05
06/05