Rockwell Automation 1747-ASB Remote I/O Adapter - Manual (Page 95)

Publication 1747-UM006B-EN-P - June 2003
Start-Up and Operation 6-9
When the 1747-ASB module is receiving reset, adapter reset or reset,
adapter decide commands, it:
•
returns input data for all of its input modules and sends output
data to all of its specialty I/O modules. It does not turn any
discrete outputs on.
•
processes all discrete and block transfers
•
controls the specialty I/O modules in the same manner as an
SLC processor in TEST mode. How each specialty I/O module
responds to the TEST mode is specific to each specialty I/O
module. Refer to its user manual for more information.
The following describes how the 1747-ASB module responds if an I/O
module is inserted or removed from a remote chassis or remote
expansion chassis when no 1747-ASB module error is present.
(1)
I/O Module Insertion into a Slot
When an I/O module is inserted, a 1747-ASB module error occurs and
all discrete outputs under its control are cleared regardless of the hold
last state selection.
I/O Module Removal from a Scanned Slot
When an I/O module is removed from a slot being scanned by the
1747-ASB module, a 1747-ASB module error occurs and all discrete
outputs under its control are cleared regardless of the hold last state
selection.
Any I/O module that has input image and is mapped into the
1747-ASB module image, is always scanned by the 1747-ASB module.
ATTENTION
!
I/O modules must not be inserted or removed when
the remote chassis or remote expansion chassis is
powered. Damage to the I/O module and/or remote
chassis or remote expansion chassis may result.
(1) Loss of power to the remote chassis or remote expansion chassis is considered a 1747-ASB module error. I/O
modules can be inserted or removed from a remote expansion chassis that is not powered, even if the remote
chassis is powered. Each chassis has its own power supply.