User`s manual

I/O SERVER User’s Manual Industrial PC
___________________________________________________________________
________________________________________________________________________
Acromag, Inc. Tel:[phone] Fax:[phone] Email:[e-mail] http://www.acromag.com
35
BIT FUNCTION
15-12 Carrier Identification:
These bits are used for carrier identification. Writing to
these bits will result in the data being stored. Reading these
bits will result in the inverse of the stored value. Reset
Condition: “1011”.
11-09 Not Used (bits read as logic “0”)
08
Write
Only
Software Reset
Writing a “1” to this bit causes a software reset. Writing a
“0” or reading this bit has no effect. When set, the software
reset pulse will have a duration of 1μs (microsecond).
07-06 Not Used (bits read as logic “0”)
05
Read
And
Write
IOS Module Access Time Out Interrupt Pending
This bit will be "1" when there is an IOS Module Access
Time Out interrupt pending. This bit will be "0" when there
is no interrupt pending. Reset condition: Set to "0". Writing
a “1” to this bit will release the pending interrupt.
04
Read
Only
IOS Module Access Time Out Status
Status bit to indicate that the last IOS module access has
timed out. This bit only reflects the last IOS module
access.
“0” if last IOS module access did not time out.
“1” if last IOS module access did time out.
03
Read
And
Write
Time Out Interrupt Enable
When set to “1”, this bit will enable the carrier board to
generate an interrupt upon time out of an IOS module
access. The default setting or reset condition is “0”
(interrupt generation upon time out disabled). The interrupt
service routine, in responding to the Time Out Access
interrupt, will need to set this bit to 0 to clear the pending
interrupt request.
02
Read
And
Write
IOS Module Interrupt Enable
When set to “1”, this bit will enable the generation of IOS
module interrupts. The default setting or reset condition is
“0” (IOS module interrupt generation disabled). Interrupts
must also be supported and configured on the IOS module.
01
Read
Only
IOS Module Interrupt Pending
This bit will be "1" when there is an interrupt pending. This
bit will be "0" when there is no interrupt pending. Polling
this bit will reflect the IOS Module’s pending interrupt
status, even if the IOS Module Interrupt Enable bit is set to
"0". Reset condition: Set to "0".
00
Read
Only
IOS Module Error
This bit will be "1" when there is an active IOS Module
Error signal. This bit will be "0" when all IOS module Error
signals are inactive. This bit allows the user to monitor the
Error signals of IOS modules A through D. Refer to your
IOS module specific documentation to see if the error
signal is supported and what it indicates. Reset condition:
Set to "0".