Specifications

SQ: 7-38
RS3: Service Quick Reference Guide
Input/Output
I/O Scanning Rates
NOTE: Addressing any panel or card cage as “B”, “C”, or “D” drops the
scanning rate to the slowest rate shown even if there are no other
addressed panels or cages. The controller scan time (1.0, .50, .25, .125
second), selected from the ControlFile Status screen, must always be
greater than the I/O point scan time. The controller scan time applies to a ll
card cages served by the controller, so the scan time of the slowest cage
must be used.
Highest
C
a
r
d
C
a
g
e
Cage Scan Rate
Minimum Controller Scan Time
(Seconds)
Card Cage
Address
Cage Scan
Pattern
(Scans
Per Second)
MDIO MAIO
A AAAA 32 .125 .25
B ABAB 16 .125 .50
C
A
B
A
C
A: 16
2
5
1
0
C
A
B
A
C
B, C: 8
.25 1.0
D ABCD 8 .25 1.0