OPC90 Server
also be written to the CIU and therefore propagated to
ABB Bailey system. The quality can also be set bad by writing a one (1) to this tag.
the users of the block data within the
Bailey system and transfer this request to the client by
. Likewise, the client must reset the ALARM flag when a
e state ition is ed and only set it again if feedback cannot
d. T iley im o fines the required
fee sign d dition and has a
im is is o ck confirmation
nd te. T d y
the client when feedback is not confirmed ust also set
tag i feedb c ter it had
irmed. FB_S g to
e cur tate o e
indicated by OUT. The FB_STATUS tag
iated w time. the
TATUS tag e indic signals match or
tch th ta icated es a
condit ft edbac er the device
. The i k
s is essentia d c rdless of its actual
mparis O e ondition by setting
STATU
Application: The OUT tag reports the state of the device as off (0) or on (1). The
RED_TAG tag allows the client to indicate the device is currently under a red tag
condition. This block supports mode. When in auto mode, logic controls the
state of the OUT tag, therefore, operator commands are ignored. In manual
mode the operator writes the requested state of OUT. OPC90 will receive the
rite request from thew
writing the new requested state to the OUT tag. When a state change occurs,
the client must update the feedback tags (F1 and F2) to reflect successful arrival
of the device at the requested state. If feedback cannot be confirmed, the client
must set the ALARM tag
new devic
be confirm
trans
he Ba
request
plemente ati n of the DD block de
states of the dback als for the evice off and on con
feedback wait t e. Th the amount f time to wait for feedba
for the comma ed sta herefore, a elay in the setting of the ALARM tag b
is acceptable. The client m
the ALARM f good ack for the urrent state is lost sometime af
gives an immediate indicatbeen conf
whether th
The
rent s
TATUS ta
f the feedb
ion as
ack signals matches the device stat
is similar to the ALARM tag but without
the assoc feedback aiting In other words, the client uses
FB_S as a cycle to cycl ation that the feedback
do not ma e device s te ind by OUT. The ALARM tag indicat
mismatch ion only a er a fe k waiting time expires aft
transition Bailey DD block logic ncludes a condition in which feedbac
statu lly ignore and always onsidered good rega
state in co
_
on to the UT tag. Th client indicates this c
the OVR S tag.
The RoviSys Company Version 7.0 Page 90
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