DIRECT ACCESS TO SET POINT
When the device is in AUTO mode and in “Normal Display Mode”, it is possible to access directly to set point modification (SP or SP2).
Pushing s or t for more than 2 s, the set point will begin changing.
The new set point value becomes operative since no pushbutton has been depressed at the end of 2 s timeout.
MANUAL FUNCTION
The MANUAL function can be accessed (only if enabled by P34=On) by depressing the MAN pushbutton for more than 1 sec.
The command is accepted and executed only if the display is in "Normal Display Mode".
When in MANUAL mode the LED's MAN annunciator will light up while the lower display shows the power output values.
The value of "rEV" is shown in the two most signifi- cant digit field while the value of "dir" (if present) is shown in the two less significant digit field.
The decimal point between the two values will be flashing to indicate instrument in manual mode. NOTE :
- A graphic symbol " | " is used for "rEV"= 100 |
- A graphic symbol " | " is used for "dir"= 100 |
The power output can be modified by using s and t pushbuttons.
In manual mode the output resolution is equal to 1%.
By depressing, for more than 1 second, MAN pushbutton the device returns in AUTO mode.
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 in the second part of the SMART algorithm (ADAPTIVE).
At power up the device will be in the AUTO mode or as it was left prior to power shut down depending on P35 configuration selection. 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
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 functions are available (exception made for the FUNC pushbutton).
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