
Publication 1757-RM810A-EN-P - May 2002
3-8
Functional Blocks
Device Control Block
DEVCTL
Description
Provides multi-input, multi-output function for interfacing to discrete devices such as motors, pumps, solenoid valves
and motor-operated valves. The Device Control block contains built-in structures for handling interlocks and supports
display of the interlock conditions in group, detail and graphic displays.
Function
•
Allows the manipulation of sets of digital outputs and interprets corresponding feedback of digital inputs
represented by the state parameter PV (Current Feedback State).
•
Operation consists of transmitting commands represented by state parameter OP (commanded output state),
monitoring PV, and producing alarms based on various configurations, such as if PV has not achieved state
commanded in OP.
•
Provides safety interlocks, individual state interlocks, initialization manual, maintenance statistics, and batch level
1 drive functions.
Inputs
May have from 0 to 4 inputs (DI [1..4]); each input is a Boolean value that represents the state of other block output or
a field DICHANNEL block.
Outputs
•
May have from 0 to 3 outputs. Each output can be Boolean (DO [1..3]) or pulsed (PO [1..3]). You can only connect a
DO [1..3] or a PO [1..3] to any one output at a time.
•
You can connect the Boolean output DO [1..3] to a Boolean parameter in any other function block or to the DO.SO in
the DOCHANNEL block.
•
You can only connect the pulsed output PO [1..3] to a DO.ONPULSE or DO.OFFPULSE in the DOCHANNEL block.
•
Note that you can only connect one Boolean (DO [1..3]) or one pulsed (PO [1..3]) output to any one DOCHANNEL
block as a DO.SO or DO.ONPULSE or DO.OFFPULSE, respectively.
Alarms
An available set of PV state alarms may be configured to represent Bad PV or disagreements between the
commanded output state (OP) and the feedback state (PV). A variety of override alarms are also available. Each of
these alarms possesses all the standard attributes of system alarms.
Parameters
ASTEPID
BADPVALM.FL
BADPVALM.PR
BADPVALM.SV
BYPASS
BYPPERM
CLROPREQFL
CMDDISALM.FL
CMDDISALM.PR
CMDDISALM.SV
CMDDISALM.TM [0..2]
CMDFALALM.FL
CMDFALALM.PR
CMDFALALM.SV
CMDFALALM.TM [0..2]
CONTROLREQ
DESC
DIXCONNECTED[1..4]
DI [1..4]
DIPVMAP [0..15]
DO [1..3]
EUDESC
GOP
GOPFINAL
GOPREQ
GOPSCADA
GPV
GPVAUTO
HIALM.PR
HIALM.SV
HIALM.TYPE
HOLDOPT
INALM
INBETFL
INITCONNECTD [1..3]
INITMAN
INITOPOPT
INITREQ [0..2]
LASTGOPREQ
LASTOPREQ
LASTOPTYPE
LASTREQFL
LASTSTEP
LOCALMAN
MAINTOPT
MAXTIME [0..2]
MAXTRANS [0..2]
MODE
MODEATTR
MODEATTRFL.NORM
MODEATTRFL.OPER
MODEATTRFL.PROG
MODETRACK
MOMSTATE
NORMMODE
NORMMODEATTR
NULLPVFL
NUMDINPTS
NUMDOUTS
NUMSIOVRD
NUMSTATES
NUMTRANS [0..2]
OFFNRMALM.FL
OFFNRMALM.OPT
OFFNRMALM.PR
OFFNRMALM.SV
OI [0..2]
OIALM.FL [0..2]
OIALM.OPT [0..2]
OIALM.PR [0..2]
OIALM.SV [0..2]
OP
OPCMD [0..2]
OPDOMAP [0..3] [1..3]
OPFINAL
OPREQ
OPTYPE
ORDER
ORDERINCM
PI [0..2]
PO [1..3]
POCONNECTED [1..3]
PULSEWIDTH [1..3]
PV
PVAUTO
PVFL [0..2]
PVSOURCE
PVSRCOPT
REDTAG
RESETFL
RESTARTOPT
SAFEOP
SAFEREDTAG
SEALOPT
SI
SIALM.FL
SIALM.OPT
SIALM.PR
SIALM.SV
STARTOPT
STATETEXT [0..6]
STATETIME [0..2]
STOPOPT
UNCMDALM.FL
UNCMDALM.PR
UNCMDALM.SV
Содержание ProcessLogix 1756-IA16
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