TSX AMZ 600
Measuring Speed
General
Normal Cycle
The measuring speed depends on the cycle used, which is defined in configuration
(See
Modification of the Scanning Cycle, p. 242): normal cycle or fast cycle.
The input scanning cycle is fixed and has a value of 16 ms, irrespective of the number of inputs used.
Example of a scanning cycle with channels 0 and 3 used:
Channel 0
4 ms
Scanning cycle = 16 ms
Channel 3
4 ms
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TLX DS 37 PL7 xxE
Fast Cycle
TSX AMZ 600
Only the channels being used are scanned, even if these are not consecutive, which gives an improved channel scanning cycle time.
The channel scanning cycle time is given by the formula:
Cycle time (ms) = 4 ms x N
N = number of channels used
For example, if 2 channels are used, the scanning cycle time will be:
2 x 4 = 8 ms
Illustration:
Channel 0 Channel 1
4 ms 4 ms
Scanning cycle = 2*4 = 8 ms
Note: In fast cycle, the user is able to assign the channels in FAST task (See
Modification of the Task Assigned to the Module Inputs, p. 243). In this case, it is
recommended not to assign too many analog input modules to the FAST task.
TLX DS 37 PL7 xxE
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