The cycle time for the TSX AEY 1614 module depends on the cycle selected (Normal or Fast), as defined in the
configuration, as well as of other configured options:
-
Normal Cycle means that the scan cycle duration is fixed.
-
With the Fast Cycle, however, the system only scans the channels designated as being In Use. The scan cycle duration is therefore proportional to the number of channels in use.
NOTE: Channels are acquired simultaneously in pairs (channel 0 and channel 8, channel 1 and channel 9, ..., channel 7 and channel 15).
Example for a module whose options are all enabled:
Tf
Wire Test (8 ms per channel requiring testing).
CSFT
Cold junction compensation on TELEFAST (70 ms).
Hi-precision
High-Precision Mode (corresponds to a self-calibrating procedure of module - 70 ms).
In order to shorten cycle time as much as possible, one should take into account the fact that channels are acquired simultaneously, in pairs.
Example of optimal wiring for 3 channels used with wiring test, Telefast cold junction compensation and in High Precision mode:
if you prefer to use only 3 channels and have a minimum cycle time, we advise using dual channels. In this manner, you will have only one elementary time for two channels. In our example, we've chosen dual channels 0 and 8, as well as channel 1.
Cycle time is therefore as follows:
NOTE: Module cycles are asynchronous with PLC cycles. At the beginning of each PLC cycle, each channel value is taken into account. If the MAST task cycle time is lower than the module's, some values will not have changed.
