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58 UDC3200 Universal Digital Controller Operator Manual 04/08
Function
Prompt
Lower Display
Selections or
Range of Setting
Upper Display
Parameter
Definition
LAST
LAST—SAME MODE AND OUTPUT—The controller will return to
the same mode (manual or automatic) at the same output level that
it had before shed.
TO MAN
TO MAN—MANUAL MODE, SAME OUTPUT—The controller will
return to manual mode at the same output level that it had before
shed.
FSAFE
FSAFE—MANUAL MODE, FAILSAFE OUTPUT—The controller
will return to manual mode at the output value selected at Control
prompt FAILSAFE.
TO AUTO
TO AUTO—AUTOMATIC MODE, LAST SP—The controller will
return to the automatic mode and the last setpoint used before
shed.
SHED SP
SHED SETPOINT RECALL
Note: If SHEDENAB=DISABLE, this prompt will not be
configurable.
TO LSP
TO LSP—Controller will use last local or remote setpoint used.
TO CSP
TO CSP—When in “slave” mode, the controller will store the last
host computer setpoint and use it at the Local setpoint. When in
“monitor” mode, the controller will shed to the last instrument Local
or Remote setpoint used, and the LSP is unchanged.
UNITS
ENG
PERCENT
COMPUTER SETPOINT UNITS
ENG — Engineering units
PERCENT — Percent of PV range
CSP RATO
–20.0 to 20.0
COMPUTER SETPOINT RATIO—Computer setpoint ratio.
CSP BIAS
–999. to 9999.
(engineering units)
COMPUTER SETPOINT BIAS—Computer setpoint bias in
Engineering Units.
LOOPBACK
LOCAL LOOPBACK tests the RS-485 communications port. It is
not used for any other communications port.
DISABLE
DISABLE—Disables the Loopback test.
ENABLE
ENABLE—Allows loopback test. The instrument goes into
Loopback mode in which it sends and receives its own message.
The instrument displays PASS or FAIL status in the upper display
and LOOPBACK in the lower display while the test is running. The
instrument will go into manual mode when LOOPBACK is enabled
with the output at the Failsafe value. The test will run until the
operator disables it here, or until power is turned off and on.
ATTENTION The instrument does not have to be connected to
the external communications link in order to perform this test. If it is
connected, only one instrument should run the loopback test at a
time. The host computer should not be transmitting on the link
while the loopback test is active.