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Figure A.1
PLC 2/30 Remote System Example
PLC-2/30
Rack 1
1
1
7
7
7
7
1
1
A
D
S
E
Rack 4
1
1
7
7
7
7
1
1
A
D
S
E
We want to find the worst case time between two consecutive
block-transfer-read operations from the same module in this system.
Solution:
1772-SD2
1
7
7
1
A
S
1
7
7
1
A
S
Program length = 4K words (K = 1,024)
Number of chassis = 4 (1 assigned rack number/chassis)
Appendix A
Rack 2
1
7
7
1
D
E
Rack 3
1
7
7
1
D
E
108121 I
A 3
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