Spectrum-controls 1769sc-IF8u Manuel d'utilisateur télécharger pdf (Page 64)

54 Compact IO

™

Universal Input module

From Table 4.7, Channel Update Time:

Module Update Time without an Autocalibration Cycle

= Ch 0 Update Time + Ch 1 Update Time

+ Ch 2 Update Time + CJC Update Time (uses lowest thermocouple filter

selected)

= 56 ms + 56 ms + 56 ms + 56 ms = 224 ms

Module Update Time during an Autocalibration Cycle

Channel 0 Scan 1 (Module Scan 1)

= Ch 0 Update Time + Ch 1 Update Time

+ Ch 2 Update Time + CJC Update Time + Ch 0 Gain Time

= 56 ms + 56 ms + 56 ms + 56 ms + 101 ms = 325 ms

Channel 0 Scan 3 (Module Scan 2)

= Ch 0 Update Time + Ch 1 Update Time

+ Ch 2 Update Time + CJC Update Time + Ch 0 Offset Time

= 56 ms + 56 ms + 56 ms + 56 ms + 73 ms = 297 ms

Channel 1 Scan 1 : (no scan impact)

No autocalibration cycle is required because Channel 1 is the same Input

Class as Channel 0. Data is updated in scan 3.

Channel 2, Scan 1 (Module Scan 3)

= Ch 0 Update Time + Ch 1 Update Time

+ Ch 2 Update Time + CJC Update Time + Ch 2 Gain Time

= 56 ms + 56 ms + 56 ms + 56 ms + 101 ms = 325 ms

Channel 2, Scan 2 (Module Scan 4)

= Ch 0 Update Time + Ch 1 Update Time

+ Ch 2 Update Time + CJC Update Time + Ch 2 Offset Time

= 56 ms + 56 ms + 56 ms + 56 ms + 73 ms = 297 ms

CJC Scan 1 (Module Scan 5)

= Ch 0 Update Time + Ch 1 Update Time

+ Ch 2 Update Time + CJC Update Time + CJC Gain Time

= 56 ms + 56 ms + 56 ms + 56 ms + 101 ms = 325 ms

CJC Scan 2 (Module Scan 6)

= Ch 0 Update Time + Ch 1 Update Time

+ Ch 2 Update Time + CJC Update Time + CJC Offset Time

= 56 ms + 56 ms + 56 ms + 56 ms + 73 ms = 297 ms

After the above cycles are complete, the module returns to scans without

autocalibration for approximately 5 minutes. At that time, the

autocalibration cycle repeats.

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Spectrum-controls 1769sc-IF8u Manuel d'utilisateur Page 64