Instruction Manual

Logic Functions - Book 1
INTERFACE BLOCK
3-19
103
Communication Blocks are Locked Active (CMLOKACT) .............................................– – R
The communications blocks locked active is set when Attribute 158, Lock ICN
Communications Blocks? (COMMLOCK) is YES.
YES 1 “COMMUNICATION BLOCKS ARE LOCKED” is active.
NO 0 Diagnostic error is not active.
104
DMA Unacknowledged (DMAUAK).................................................................................. – WR
The unacknowledged DMA transfer diagnostic indicates if the condition is or is not
acknowledged. The status can be read or acknowledged as follows:
YES 1 Diagnostic error is unacknowledged.
NO 0 Diagnostic error is acknowledged.
105
DMA Active (DMAACT)......................................................................................................– – R
The active DMA transfer diagnostic is set when an error occurs in a DMA transfer and the
instrument therefore shuts itself down. The diagnostic is readable when the instrument is
powered up again. See Instrument Shutdown Fault (#036).
YES 1 “DMA FAULT” is active.
NO 0 Diagnostic error is not active.
106
I/O Overrun (IOVRNSUP)...................................................................................................CWR
The I/O overrun diagnostic indicates that the instrument was unable to complete all of its I/O
communications and processing before the data was required by a user task. This error
always forces an INSTRUMENT IS OVERCONFIGURED diagnostic and all tasks will be
scanned at a slower rate so that all the I/O work is completed. The diagnostic can be
suppressed or enabled as follows:
SUPPRESS 1 Diagnostic error is suppressed.
ENABLE 0 Diagnostic error is enabled.
107
I/O Overrun Unacknowledged (IOVRNUAK)................................................................... – WR
The unacknowledged I/O overrun diagnostic indicates if the condition is or is not
acknowledged. The status can be read or acknowledged as follows:
YES 1 Diagnostic error is unacknowledged.
NO 0 Diagnostic error is acknowledged.
108
I/O Overrun Active (IOVRNACT).......................................................................................– – R
The instrument is unable to complete all I/O sampling at the intervals specified. The scan
execution times should be examined to determine which tasks should be simplified or run at a
slower rate. Note that when the instrument is overconfigured, all tasks will run at a
proportionally slower rate.
YES 1 “I/O OVERRUN” is active.
NO 0 Diagnostic error is not active.
109
Communication Hardware Fault Unacknowledged (CMHWFUAK).............................. – WR
The unacknowledged communication hardware fault diagnostic indicates if the condition is or
is not acknowledged. The status can be read or acknowledged as follows:
YES 1 Diagnostic error is unacknowledged.
NO 0 Diagnostic error is acknowledged.