Rockwell-automation 1771-DE Absolute Encoder Module User Manual Manuel d'utilisateur télécharger pdf (Page 53)

Appendix A

AĆ12

= 476 + 36

= 512 ms

CT2 = Not a block-transfer channel

CT3 = [68] x [1] + 1 x 9

= 68 + 9

= 77 ms

CT4 = Not an active channel

4. Compute the encoder read-/write-block-transfer time. Example

values have been added.

Program Scan:

Time (program)=2.5 ms/1K words x 20K words

=2.5 x 20

=50 ms

Scanner Scan:

Time (read or write) = 512 ms for channel 1 and 77 ms for channel 3

(from Step 3).

Read/Write

Time =Program scan + 2 [Scanner scan]

(encoder =50 + 2 [512]

module in =50 + 1024

channel 1) =1074 ms

=1.1 seconds

Time =Program scan + 2 [Scanner scan]

(encoder =50 + 2[77]

module in =204 ms

channel 3)

1 2 ... 48 49 50 51 52 53 54 55 56 57 58 ... 79 80

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Rockwell-automation 1771-DE Absolute Encoder Module User Manual Manuel d'utilisateur Page 53