Communication
6.5 Communication via PROFINET
Control Units CU240S
168
Operating Instructions, 07/2008 - FW 3.2, A5E00766042B AD
Table 6-34 Parameters for flexible interconnection of process data
Telegram
PZD1
STW/ZS
W
PZD2
HSW/HI
W
PZD3
PZD4
PZD5
PZD5
Link values for setpoints master to
inverter
r8850.00 r8850.01 r8850.02 r8850.0
3
r8850.0
4
r8850.0
5
Link parameters for actual values
inverter to master
P8851.0
0
P8851.0
1
P8851.0
2
P8851.
03
P8851.
04
P8851.
05
Note
r8850 also acts as a display parameter through which the setpoints received by the
PROFINET interface can be checked.
P8841 PROFINET functions
A number of advanced property settings for the PROFINET interface can be accomplished
using the indexed parameter P8841.
For most applications, however, the defaults values are adequate (value = 0). The following
table shows the property setting options.
Table 6-35 PROFINET functions
Parameter Meaning
Value range
P8841.01
BOP parameter in EEPROM:
Modifications to parameter settings
via SIMATIC HMI are stored
permanently in the EEPROM or as
volatile data in the RAM.
0: Permanent (EEPROM)
1: Volatile (RAM)
P8841.03
Select displayed diagnostics
screen.
0: Standard diagnostics
Process data monitoring
The process data are monitored according to the following parameter:
● P8840 Fieldbus Off-time.
If no telegram is received through the PROFINET interface, the fault F0070 will be
generated. If no telegram is received , Parameter P8840 defines the period of time till the
fault message is generated.
– P8840 = 0 means: No monitoring
– P8840 > 0 means: The period of time in milliseconds
CAUTION
Do not deactivate the process data monitoring function! If the monitoring function is
deactivated, the inverter will not recognize a PROFINET communication failure and
continue to operate with possibly wrong commands and setpoints.
F0070 is activated if no new setpoints are received by the PROFINET interface within the
telegram failure period.