Emerson DLC3020f Manuál s instrukcemi Strana 116

  • Stažení
  • Přidat do mých příruček
  • Tisk
  • Strana
    / 200
  • Tabulka s obsahem
  • ŘEŠENÍ PROBLÉMŮ
  • KNIHY
  • Hodnocené. / 5. Na základě hodnocení zákazníků
Zobrazit stránku 115
Instruction Manual
D103434X012
Blocks
November 2014
114
Figure B‐11. Analog Output Function Block Schematic
B2717
CAS IN
Position
Feedback
Analog
Output
Access
Analog
Output
Access
Analog
Input
Shed
Mode
SP
HI/LO
Limit
SP
Rate
Limit
Convert
and Status
Calculatio
n
BKCAL 
OUT
OUT
RCAS 
OUT
RCAS 
IN
SP 
RATE DN
SP 
RATE UP
SP 
WRK
PV 
SCALE
IO 
OPTS
Operator
Setpoint
READ 
BACK
PV
SP 
LOW LIM
SP 
HI LIM
CHANNEL
MODE
DRemoteCascade (RCas)—The SP [8] is set by a host computer by writing to the RCAS_IN [28] parameter. The SP [8]
value is used to set the OUT [9] attribute automatically.
DOut of Service (OOS)—The block is not processed. The output channel is maintained at the last value and the status
of OUT [9] is set to Bad: Out of Service. The BLOCK_ERR [6] attribute shows Out of Service.
DInitialization Manual (Iman)—The path to the output hardware is broken and the AO block output will remain at the
last position. This means the transducer block mode is Out of Service or Manual or configured to respond to the DO
block.
DLocal Override (LO)—The output of the block is not responding to inputs because the fault state action is active. OUT
[9] freezes or goes to value per IO_OPTS [14].
The target mode of the block may be restricted to one or more of the following modes: Man, Auto, Cas, RCas, or OOS.
Mode Handling
Shed Options—RCAS Mode Only
Automatically changing through the permitted modes when starting from a remote mode, fall from (or shed) or climb
to a remote mode is determined by the parameter SHED_OPT [27]. A block climbs and sheds through the same path.
For example, if SHED_OPT [27] specifies that a block should shed to Auto, then, if the block target mode is set to RCas,
the block goes through Auto on the way to RCas.
Zobrazit stránku 115
1 2 ... 111 112 113 114 115 116 117 118 119 120 121 ... 199 200

Komentáře k této Příručce

Žádné komentáře