Instruction Manual

Instruction Manual
D103434X012
Blocks
November 2014
118
FSTATE_TIME [23]: The length of time, in seconds, that the AO block will wait to set Fault State. When Fault State is
set, the OUT [9] value goes to either the FSTATE_VAL [24] value or holds its last position, depending on I/O_OPTS [14].
When the block has a target mode of CAS, a fault condition will be detected if the CAS_IN [17] has a BAD status or an
Initiate Fault State substatus is received from the upstream block.
FSTATE_VAL [24]: Determines the OUT [9] value if IO_OPTS “Fault State to Value” is selected. The OUT [9] value
transitions to FSTATE_VAL [24] after FSTATE_TIME [23] elapses and the fault condition has not cleared.
I/O Options
The I/O options parameter (IO_OPTS [14]) allows you to select how the I/O signals are processed. You can set I/O
options in Out of Service mode only. The following I/O options are available in the AO block:
Use PV for BKCAL_OUT—Changes the BKCAL_OUT [25] value to the PV [7] value. When the Use PV for BKCAL_OUT
option is not enabled (False), the BKCAL_OUT [25] value is the working setpoint value.
Target to Man if Fault State Activated—Set the target mode to Man, thus losing the original target, if Fault State is
activated. This latches an output block into the manual mode.
Use Fault State value on Restart—Use the value of FSTATE_VAL [24] for SP [8] when power is restored or if the device is
restarted, otherwise use the last value saved in non‐volatile memory. This does not act like Fault State, it only uses the
value of FSTATE_VAL [24].
Fault State to Value—The output action to take when a fault occurs (if not selected, use hold last value; if selected, use
FSTATE_VAL [24]).
Increase to Close—If the Increase to Close bit is set the value to the transducer is inverted, e.g. 20% becomes 80%.
SP‐PV Track in Man—Permits the setpoint to track the process variable when the target mode of the block is MAN.
SP‐PV Track in LO or IMan—Permits the setpoint to track the process variable when the actual mode of the block is LO
or IMan.
SP Track retained Target—Permits the setpoint to track the RCas or Cas parameter based on the retained target mode
when the actual mode of the block is LO or Man. When SP‐PV track options are enabled, the SP Track retained target
will have precedence in the selection of the value to track when the actual mode is Man and LO.
Simulation
When simulate is active, the transducer sub‐parameters show the actual transducer block status and value as normally
passed back to the AO block. The Simulate sub‐parameters are writable and replace actual transducer values.
Table B‐25. Channel Selection for the Analog Output Function Block
Channel Parameter
(1)
Block
Index
Number
XD_SCALE Units
2 COMP_TEMPERATURE TB 31 Celsius (1001), Fahrenheit (1002), Kelvin (1000), Rankine (1003)
3 COMP_PRESSURE TB 77 Pa (1130), Bar (1137), atm (1140), psig (1143), psia (1142)
4 UPPER_DENSITY TB 36
kg/m3 (1097), g/cm3 (1100), kg/L (1103), g/mL (1104), g/L (1105), lb/in3 (1106), lb/ft3
(1107), lb/gal (1108), degBaum hv (1111), degBaum lt (1112), degAPI (1113), SGU (1114)
5 LOWER_DENSITY TB 39
kg/m3 (1097), g/cm3 (1100), kg/L (1103), g/mL (1104), g/L (1105), lb/in3 (1106), lb/ft3
(1107), lb/gal (1108), degBaum hv (1111), degBaum lt (1112), degAPI (1113), SGU (1114)
1. Refer to table B‐54 for transducer block parameter description.