Return 1 – Watlow Series 920 Microprocessor-Based Ramping Control User Manual

Page 48

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RETURN 1

Determines whether the alarm type for Auxiliary Output 1 will be a process alarm or a deviation

alarm for the Series 920. This parameter will not appear if AUX1 = AL, or DIP switch # 7 is ON.

Range:

Alpha Display

Alarm Type

Default: P

ALTYP1 P

Process Alarm

ALTYP1 D

Deviation Alarm

Determines whether the alarm type for Auxiliary Output 2 will be a process alarm or deviation

alarm. This parameter will not appear if AUX2 = AL, or DIP switch #7 is ON.

Range:

Alpha Display

Type

Default: P

ALTYP2 P

Process Alarm

ALTYP2 D

Deviation Alarm

Selects alarms as latching or non-latching. Latching remains energized until you manually clear it.

This parameter will not appear if DIP switch #7 is ON.

Range: LAT or NLAT

Default: NLAT

Allows the operator to change the input gain of the RTD Input for diierent curves. This parameter
will not appear if the input type is not RTD whole or RTD tenths, or DIP switch

#7 is ON.

Range: JIS or DIN

Default: JIS

Selects the minimum percent of power that the Series 920 will output. This parameter will not
appear if DIP switch #7 is ON,

Range: 0 to 100%

Default: 0

Selects the maximum percent of power that the Series 920 will output. This parameter will not
appear if DIP switch #7 is ON.

Range: 0 to 100%

Default: 100

The Guaranteed Soak parameter guarantees the actual temperature is being controlled within a

window around set point. lf exceeded, the step time clock stops and the HOLD LED flashes until
the actual temperature is within the soak window.

Range: 0 to 90°F/ to 50°C

Default: 0

Represents the selection of the protocol type for serial communications. This selects XON/XOFF

protocol or ANSI X3.28 communication protocol. This parameter will not appear if your Series 920
does not have communications.

Range: STX or XON

Default: STX

Represents the device identification number as required for the ANSI X3.28 communications

protocol for the Series 920. This parameter will not appear if COM has been selected as XON, or if
your Series 920 does not have communications. Refer to the 920 Data Communications Manual.

Range: 0 to 9

Default: 0

Allows for specific groups of parameters to be unaffected by the UP/DOWN and ENTER keys,

preventing these parameters from being changed accidentally.
0 = No lock, full access of all parameters.

1 = Prevents user from editing all parameters except the SYSTEM parameter group, the LOCK

parameter, the STEP and FILE parameter in the PROGRAM and pre-RUN groups.

2 -Prevents user from editing all parameters except

ER1 ,

ER2, & ALRM in the SYSTEM menu,

and the LOCK, STEP and FILE parameter are in the PROGRAM and pre-RUN menus.

Range: 0 - 2 Default: 0

Allows the operator to clear a file of the Series 920.Press ENTER, and choose the FILE? to clear.

Range: 1 - 10

Default: 1

From RETURN, you can go back to the SYSTEM prompt by pressing the ENTER key, or return to

SPCLFUNC by pressing the MODE key.

48

WATLOW Series 920 User’s Manual

How To Proqram the Series 920, Chapter 6

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