Rockwell Automation 1771-ASB/E Remote I/O Adapter User Manual - Manual (Page 18)

2–4 Installing Your Module
Publication 1771-UM001A-US-P - February 2000
link response - unrestricted or series B emulation.
Certain scanner modules with multiple communication ports
require a delay in the link turnaround time to allow the central
processing unit (CPU) in the scanner sufficient time to service
all communication ports. Without this delay, some incoming
information may be missed while the scanner is servicing
another port. This results in multiple communication retries.
To provide the necessary delay, set the link response switch
(position 5, switch S2) to the ON position.
Scanner modules which require a delay are:
Programmable Controller Scanner Module
PLCĆ2 1772ĆSD2
1775ĆS4A
PLCĆ3 1775ĆS4B
1775ĆS5
PLCĆ3/10
1775ĆSR5
PLCĆ3/10
1775ĆSR
•
noise immunity – enables backplane retries to occur when
noise is detected on the I/O rack backplane. This feature is
enabled when the switch is off. Do not use this switch position
as a substitute for improper noise suppression.
Refer to the Table below for Figure and page numbers of switch
settings for each processor family.
S1 and S2 Switch Settings for: Refer to:
PLCĆ2 family processor Figure2.4, page2-5
PLCĆ3 family processor Figure2.5, page2-6
PLCĆ5 family, SLC and ControlLogix processors
without complementary I/O
Figure2.6, page2-7
PLCĆ5 family, SLC and ControlLogix processor with
complementary I/O
Figure2.7, page2-8