8.4 15
ibaPDA General sengs and informaon
The acquision mebase is the superior clock for the enre system and the fastest period for
sampling data in running acquision. Slower sampling can can be congured for the individual
modules by the module’s mebase seng.
Excluded are data which are acquired over ber opc connecons with ibaNet 32Mbit Flex pro-
tocol, data from ibaInSpectra modules and ibaInCycle modules as well as virtual modules. In
these cases mebases faster than the acquision mebase can be congured.
Faster sampling induces higher load and data volume. Therefore, it is always a reasonable ap-
proach to set the sampling on an appropriate level , i.e. as low as required for the intended ap-
plicaon .
The congured module mebases cannot be chosen arbitrarily and independently from each
other in order to ensure the good performance of the system even with high amounts of data.
An important quanty is the “driver period” which results from the module mebases. It is de-
termined by the least common mulple of all module mebases.
The longest driver period should not exceed 1000 ms. The rao of smallest module mebase
and driver period must be limited. Bad or inadmissible conguraons will be indicated during
the validaon on start of the acquision by warning or error messages.
You will nd an overview of all modules including their congured me bases in Module over-
view (see ì Module overview, page 40).
As the name implies, the acquision mebase refers only to data acquision (sampling) not
recording. The mebase for the data recording which is used to write the measured values into
the data le is congured in the data storage proles.
Startacquisiononstartupofserveraer...s
If you check this opon, the acquision will be started automacally aer a system restart of
the server (equivalent of the GO buon). You have to select this opon if you need a full au-
tomac startup sequence of the system, e.g. aer a power failure. A prerequisite is, of course,
that the ibaPDA server service starts automacally when the system is boong.
In the eld next to it, you can set a delay me in seconds. A delay of >0 may be useful if other
components, drivers or interfaces are involved, which are needed to correctly start the acquisi-
on and that need some me to be available (e.g. remote OPC server).
Forcereloadofdriveratnextstartoftheacquision
If you check this opon, the drivers will be reloaded and restarted with the next change of the
I/O conguraon. The selecon of this opon will not be retained. The opon will be disabled
automacally aer the driver has been loaded and started. You have to enable it again for the
next repeon.
Selecng this opon is recommended if ibaPDA does not experience any interrupts. The system
always checks the interrupts when the acquision starts. If no interrupts are detected, an error
message is shown.
Restartacquisiononnon-recoverableerror
If you check this opon, data acquision will be stopped automacally in the event of an
non-recoverable error.
The automac restart is the aempt to x the error. At the same me, faulty modules may
eventually be disabled. For most of the applicaons it is vital, that the data acquision with iba-