Super Systems 7EK 31081 - Manual (Page 25)

20
The transfer from AUTO to MANUAL and viceversa is
bumpless (this function is not provided if integral action is
excluded).
If transfer from AUTO to MANUAL is performed during the
first part of SMART algorithm (TUNE) when returning in
AUTO the device will be forced automatically to the
second part of the SMART algorithm (ADAPTIVE).
At power up the device will be in the status defined by P40
parameter.
Note: When start up occurs in Manual mode with power
output set to 0, the control outputs will be in
accordance with the following formula: "rEV"
output - "dir" output = 0
DIRECT ACCESS TO SETPOINT
When the device is in AUTO mode and in “Normal Display
Mode”, it is possible to access directly to setpoint
modification (SP, SP2, SP3 or SP4).
Pushing
s or t for more than 2 s, the setpoint will begin
changing.
The new setpoint value becomes operative since no
pushbutton has been depressed at the end of a 2 s
timeout.
SERIAL LINK
The device can be connected to a host computer by a
serial link.
The host can put the device in LOCAL (functions and
parameters are controlled via keyboard) or in REMOTE
(functions and parameters are controlled via serial link).
The REMOTE status is signalled by a LED labelled REM.
This instrument allows to modify the operative and
configuration parameters, via serial link.
The necessary conditions to implement this function are
the following:
1) Serial parameters from SEr1 to SEr4 should be
properly configurated using the standard front
keyboard procedure
2) Device must be in the OPERATING mode
During the downloading of configuration the device
goes in open loop with all output in OFF state.
At the end of configuration procedure, the device performs
an automatic reset and then returns to close loop control.
SMART function
It is used to optimize automatically the control action.
To enable the SMART function, push the FUNC
pushbutton until "Sñrt" parameter is shown.
Pushing
s or t set the display "On" and push the
FUNC pushbutton.
The SMRT LED will turn on or flashing according to the
selected algorithm.
When the smart function is enabled, it is possible to
display but not to modify the control parameters.
To disable the SMART function, push the FUNC
pushbutton again until "Sñrt" parameter is shown.
Pushing
s or t set the display "OFF" and push the
FUNC pushbutton.
The SMRT LED will turn off.
The instrument will maintain the actual set of control
parameter and will enabled parameter modification.
NOTES :
1) The SMART function is disabled when:
a) ON/OFF control is programmed
b) the instrument is in manual mode
c) P35 is equal to zero.
2) The SMART enabling/disabling can be pro-
tected by safety key. (see P35)
LAMP TEST
When it is desired to verify the display efficiency, push
FUNC pushbutton for more than 10 s. The instrument will
turn ON, with a 50 % duty cycle, all the LEDs of the
display (we define this function "LAMP TEST").
No time out is applied to the LAMP TEST.
When it is desired to come back to the normal display
mode, push FUNC pushbutton again.
During the LAMP TEST the instrument continues to
control the process but no keyboard function is available
(exception made for the FUNC pushbutton).
31081-1-00.p65 3/24/00, 11:59 AM 20