Timing of measurements on inputs
(Original Document)
Introduction
The cycle time for the TBX AMS 620 module is fixed at 42.4 ms.
The measurements are sequenced in the following manner: channel 0, channel 1, channel 2, channel 3, channel 4, channel 5 then acquisition of two internal reference voltage channels, required for cyclical calibration.
Breakdown of the cycle time
Scanning time values:
Type of time
Time
Scanning time for a channel
  • 5.3 ms,
Acquisition time for a complete cycle
  • 42.4 ms.
Illustration:
NOTE:
  • The cycle is always identical, even when some channels are not in use,
  • The time required for the program to access the measurements also depends on the transmission times on the Fipio bus and on the PLC task period.