Parameterizing and commissioning
CX8093
42
Version: 1.6
PROFINET State
If you link the PnIoBoxState variable with your PLC program, you can monitor the state of the PROFINET
controller with it. The state 0x0005 is the error-free state, i.e. the master is in data exchange with the device
(i.e. the CX8093).
0x0001 = Device is in I/O exchange
0x0002 = Device is blinking
0x0004 = Provider State -> 0 = Stop, 1 = Run
0x0008 = Problem Indicator -> 0 = OK, 1 = Error
6.4.3
SyncTask
The SyncTask triggers the PROFINET task and thus the speed with which the PROFINET communication
operates. By default the SyncTask is set to
Standard (via Mapping)
. This means that the SyncTask is
triggered via the mapping of the variables. If several tasks are linked with the PROFINET adapter, then the
one with the higher priority than the SyncTask is always used.
Pay attention here to the task times of the SyncTask. These must correspond to the value x², i.e. 1 ms, 2 ms,
4 ms, 8 ms, 16 ms etc.
The PROFINET controller must then be set to the SyncTask or to the value x+1.
Example
SyncTask 4 ms, the PROFINET controller may then be set to the cycle time 4 ms, 8 ms, 16 ms etc. In this
case cycle times of 1 ms or 2 ms may not be used. If the SyncTask is set via the PLC mapping, make sure
that a breakpoint leads to the interruption of the task so that the PROFINET communication is no longer
processed. In order to circumvent this case the Sync Task can be set to
Special Sync Task
; it is not
necessary to link variables. It is recommended to use this setting, since it then runs independently of the
PLC task and there is no synchronicity in the case of PROFINET RT for system-related reasons.
Pay attention to the system utilisation rate of your Embedded PCs. The shorter the PROFINET cycle time is,
the higher the total system utilisation rate will be. A very high system utilisation rate can lead to an ADS
connection no longer being triggered often enough and this connection may be interrupted. In order to
enable trouble-free ADS communication the system utilisation rate should not exceed 70% (see System
utilisation rate).
