Watlow Series 920 Microprocessor-Based Ramping Control - Manual (Page 69)

Deviation: The difference between the value of the controlled variable and
the value at which it is being controlled.
Default parameters: The parameters, or programmed instructions, which are
permanently stored in microprocessor software to provide a
data base.
DIP switch: A Dual In-line Package switch.
DIN:
Display capability:
Droop:
Duty cycle:
ER1:
ER2:
Events:
EV1 & EV2:
FILE:
GS:
HIPWR:
Deutsche Industrial Norms, a widely-recognized
standard for engineering units.
German
In a digital indicating instrument, the entire span that can be
indicated if fully utilized.
The difference in temperature between set point and stabilized
process temperature.
Percentage of “load ON time” relative to total cycle time.
ER1 (Error 1) is considered a fatal error; your system will shut
down. When the Series 920 shuts down, all events turn off,
and your program stops running. When an error occurs, ER1
OOXX alternately flashes with the parameter you are presently
on. While in either
the RUN or HOLD mode, press ENTER to
stop the display from flashing the error code. This will not clear
the error, but stops the error code from flashing for 5 minutes.
To clear an error, return to the SYSTEM mode and ENTER the
ER1 parameter. This clears your error unless it is a reoccuring
error and has not been resolved.
ER2 (Error 2) is considered non-fatal. If you are in the RUN
mode, your program continues running unless it is a program
error. ER2 00XX appears, and alternately flashes along with
the parameter that you are presently on. While in either the
RUN or HOLD mode, press ENTER to stop the display from
flashing the error code. This will not clear the error, but stops
the error code from flashing for 5 minutes. Clear an ER2
parameter under the SYSTEM mode. If the error persists, refer
to the Error Code list on Page 78 to clear.
An event is an ON/OFF auxiliary output relay signal. You can
use events, based on time, temperature, or other process
variables, to trigger peripheral equipment or process.
These auxiliary outputs can be alarms or events. EV1 and EV2
only appear when AUX1 and AUX2 = EV respectively. You
can change the state of the events only in the HOLD mode.
Auxiliary outputs can be alarms or events.
Represents the current SYSTEM file of the Series 920 to be
edited or reviewed. Under the LINK parameter, FILE? stands
for the file that you want to link to.
The Guaranteed Soak parameter guarantees that the actual
temperature is being controlled within a window around set
point. If exceeded, the step time clock will stop until the actual
temperature is within the soak window.
Selects the maximum percent of power the Series 920 will
output. Will not appear if DIP switch #7 is ON.
Appendix WATLOW Series 920 User’s Manual 69