Communication
87
Cyclical message types
PPO types
Figure 8. PPO message types
Type 1
Type 2
Type 3
Type 4
Type 5
Parameter Process data
CW REF PZD3 PZD4 PZD5 PZD6 PZD7 PZD8 PZD9
PZD10
VALUEIND
identification
PZD3SW ACT PZD4 PZD5 PZD6 PZD7 PZD8 PZD9
PZD10
Fixed area Freely mappable area
OUT area – Data sent from Master to Slave (control data)
IN area – Data sent from Slave to Master (actual data)
Parameter Identification:
ID – Parameter Identification
IND – Index for Arrays
VALUE – Parameter Value (Max. 4 bytes)
PKW – Parameter ID/Value
Process Data:
CW – Control Word
SW – Status Word
REF – Reference
ACT – Actual Value
PZD – Process Data (application-specific)
DW – Data Word
OUT area
IN area
ID IND VALUE
Type 6
Parameter
channel
DP-V0
DP-V0
DP-V0
DP-V1
DP-V1
DP-V1
PKW PZD