The Status Output (SO) setting is impacted by the ONPULSE and OFFPULSE parameters as
indicated in the following table.
Parameter Status Output (SO) setting If SO is set to 0.0
ONPULSE On - for specified duration SO is immediately set to OFF
OFFPULSE Off - for specified duration SO is immediately set to ON
Table 10.15 Status Output settings
To provide consistent and safe behavior, the following occurs when setting DOTYPE to either
ONPULSE or OFF PULSE.
If Then
MODE is
MAN
the ONPULSE and OFFPULSE parameters only accept operator writes. (Program
access level writes and NOT all other writes are accepted.)
operator access level writes to SO are accepted and writing SO terminates an active
pulse.
PTEXECST
is ACTIVE
changing MODE to CAS sets the output to the quiescent state
PTEXECST
is ACTIVE
always sets the output to the quiescent state
Table 10.16 Setting DOTYPE to ONPULSE or OFFPULSE
10.15.4 Determining Initialization Request Flag - DO Channel blocks
The request to initialize a DO channel is accomplished through the INITREQ or PWMINITREQ
parameters.
The following
is set to ON
And
INITREQ l Control strategies in Experion cannot manipulate the output.
l Device Control blocks and Position Proportional control algorithms are
automatically forced to initialize when outputting to a Digital Output channel.
l When one or more of the following is true:
l the IOMSTATE is IDLE, or
l PTEXECST is INACTIVE
l channel MODE is set to MAN, or
l there is a soft failure and the point is not working
NOTE
Device Control blocks and Position Proportional control algorithms are
automatically forced to initialize when outputting to a Digital Output
channel whose INITREQ is ON
NOTE
Standby manual functionality is not supported in Series C
