Rockwell Automation 1747-PCINT API Software for 1746 I/O - Manual (Page 92)

6–38 Library of Routines OC_GetStatusFile
Publication 1747-6.5.3 June 1998
9 to 10 status
I/O interrupt enabled
These two words are bit-mapped to the 30 I/O slots. Bits 9/1 through 10/
14 refer to slots 1-30. Bits 9/0 and 10/15 are not used.
The corresponding enable bit must be set in order for an I/O interrupt
received priority message to be generated when a module issues an
interrupt request.
11/0 to 11/8 reserved
11/9 status
I/O scan toggle bit
This bit is cleared upon entry into Scan mode and is toggled (changes
state) at the end of every I/O scan.
11/10 dynamic configuration
DII reconfiguration bit
If the bit is set by the host, the DII function will reconfigure itself at the end
of the next I/O scan.
11/11 to 11/
15
reserved
12 status
Last I/O scan time
This word indicates the current observed interval between consecutive I/
O scans. The interval time is reported in units of 250 ms.
Resolution of the last scan time is +0 to -250 ms. For example, the value
10 indicates that 2.25-2.5 ms was the last scan time.
13 dynamic configuration
DII function enable
A value of zero written to this word will disable the discrete input interrupt
function. Any non-zero value will enable the function.
14 dynamic configuration
DII slot number
This word is used to configure the DII function. The slot number (1-30)
that contains the discrete I/O module should be written to this word. The
scanner will fault if the slot is empty or contains a non-discrete I/O module.
This word is applied upon detection of the DII reconfigure bit 11/10 or upon
entry to Scan mode.
15 dynamic configuration
DII bit mask
This word contains a bit-mapped value that corresponds to the bits to
monitor on the discrete I/O module. Only bits 0-7 are used in the DII
function. Setting a bit indicates that it is to be included in the comparison
of the discrete I/O module’s bit transition to the DII compare value (word
16). Clearing a bit indicates that the transition state of that bit is a “don’t
care.”
This word is applied upon detection of the DII reconfigure bit 11/10 and
at the end of each I/O scan.
16 dynamic configuration
DII compare value
This word contains a bit-mapped value that corresponds to the bit
transitions that must occur in the discrete I/O module for a count or
interrupt to occur. Only bits 0-7 are used in the DII function. Setting a bit
indicates that the bit must transition from a 0 to a 1 to satisfy the compare
condition for that bit. Clearing a bit indicates that the bit must transition
from a 1 to a 0 in order to satisfy the compare condition for that bit. An
interrupt or count will be generated upon the last bit transition of the
compare value.
This word is applied upon detection of the DII reconfigure bit 11/10 and
at the end of each I/O scan.
Word/Bit: Classification: Description: