User Manual
Logic Functions - Book 2
SEQUENCE BLOCK
10-18
14
Calculation Error Active Quality
(CERRAQ)...................................................................– WR
If the calculation error diagnostic is enabled, this status indicates if the quality of the active
diagnostic is GOOD or BAD. Only writeable in DEBUG.
GOOD 0 Quality when the block STATE is RUN or HOLD.
BAD 1 Quality when the block STATE is OFF.
15
Bad Step Error
(INVSTS) .................................................................................................. CWR
When a calculated step is out of range or a syntax error is detected in a transition expression
the block reports the diagnostic error as BAD STEP ERROR and takes action in accordance
with the configuration of Attribute No. 43, Bad Step Error Action.
ENABLE 0 Bad step error is enabled
SUPPRESS 1 Bad step error is suppressed
16
Bad Step Error Unacked
(INVSTU) ..................................................................................– WR
If the bad step error diagnostic is enabled, the unacknowledged status indicates if the
diagnostic is or is not acknowledged. Only writeable in DEBUG.
NO 0 Diagnostic error is acknowledged.
YES 1 Diagnostic error is unacknowledged.
17
Bad step Error Unacked Quality
(INVSTUQ) ..................................................................– WR
If the bad step error diagnostic is enabled, this status indicates if the quality of the
unacknowledged diagnostic is GOOD or BAD. Only writeable in DEBUG.
GOOD 0 Quality when the block STATE is RUN or HOLD.
BAD 1 Quality when the block STATE is OFF.
18
Bad Step Error Active
(INVSTA) ......................................................................................– WR
If the bad state error diagnostic is enabled, the active status indicates if the diagnostic is active
even after acknowledgement. Only writeable in DEBUG.
NO 0 Diagnostic error is not active.
YES 1 Diagnostic error is active.
19
Bad Step Error Active Quality
(INVSTAQ) .....................................................................– WR
If the bad step error diagnostic is enabled, this status indicates if the quality of the active
diagnostic is GOOD or BAD. Only writeable in DEBUG.
GOOD 0 Quality when the block STATE is RUN or HOLD.
BAD 1 Quality when the block STATE is OFF.
20
Failure Error
(FAILS) ......................................................................................................... CWR
When the fail step is executed as a result of a calculation error, bad input error, or a bad step
error the block reports a diagnostic error as FAILURE ERROR to alert the user that the
sequence has been driven to the Fail Step.
ENABLE 0 Failure error is enabled
SUPPRESS 1 Failure error is suppressed