OPC90 Server
error occurred. A search for specific function codes could be implemented by
monitoring the FC tag while “stepping” through a Bailey configuration.
7.3.4 Changing Bailey Controller Module Modes
Bailey controller modules are always in one of three operating modes. These
modes are execute, configure and error. When in the execute mode the
controller runs its block configuration. In this mode of operation, existing blocks
can be tuned (see section 7.3.2) but new blocks cannot be added and existing
locks cannot be modified or deleted. When in the configure mode, the controller
ing its block ration. In this mode of operation, existing blocks
odified or del dule
r mode on
ecute hen
Func
y
t
g
WARNING controller from execute to
an c plant trip or major outage to occur. For this reason, writing
PERA control. When the
PC90 BLK is configured, a case sensitive password is assigned to it. Before
t writes to the OPERATION tag, the OPC Client must first write
eceived or the received
assword is incorrect. The PASSWORD tag returns the text “********” when the
ssword has received. After password validation, writes to
ATION will cau ule ( set using the
ADDR_N to the
ting mo upported:
pleted. When the ACKNAK tag is
reque successful, non-zero indicates an error occurred. If for
req the
at caus
or security, it is highly recommended that once an OPC client has completed its
ATION tag, it should lock it by sending an invalid password to
b
is not runn configu
can be m eted and new ones can be added. A controller mo
enters the erro of operation when it detects a configuration error
transition to the ex
trip block (Bailey
mode. A controller can also enter the error mode w
tion Code 32) receives a trip signal. a
The OPERATION tag can be used to change the current operating mode of an
Bailey controller. The MODE tag can be used to monitor the module’s curren
mode of operation. It will return a text message indicating the current operatin
ode. , changing the operating mode of a m
configure c ause a
to the O TION tag has been placed under password
O
OPC90 will accep
the correct password to the PASSWORD tag. The PASSWORD tag returns the
text “????????” when the password has never been r
p
correct pa been
OPER se the currently addressed mod
ADDR_RING,
equested opera
ODE and ADDR_MODULE tags) to transfer
r de. The following OPERATION tag writes are s
1 = Request module to perform a software reset
2 = Request module to enter the configure mode of operation
3 = Request module to enter the execute mode of operation
4 = Request module to initialize (clear) its current block configuration
Completion of the requested module operation is flagged when the OPERATION
tag is reset to a value of zero (0). The MESSAGE tag will also return a text
message indicating completion of the module operation or the reason for failure if
he requested operating mode cannot be comt
zero the
ple, a
st was
exam
MESSAGE tag will display a message indicati
uest to enter the execute mode actually results in error mode,
ng why this occurred and the Bailey
block th ed the error.
F
use of the OPER
The RoviSys Company Version 7.0 Page 46
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