Zone Assignments

 

 

WARNING: This screen should not be changed without consulting SSi at 513-772-0060.

 

*Client Instrument Setup must be configured prior to Zone Assignment setup

 

The zone assignment feature allows the Series 9220 program to change set points on all instruments of a multi-zone furnace.  The Series 9220 has up to five temperature zone assignments available (Zone Assignment 1 – Zone Assignment 5).   Typically, the first zone is configured to the programmer’s temperature instrument.  That is the master set point that will be propagated to the other configured zone instrument set points on set point change.  For example, the user may want to set 4 temperature zones from a recipe where the programmer temperature instrument is loop 2.  In this case, zone 1 would be configured as loop 2.  Subsequent zones would be configured as previously configured Client temperature controllers.

 

If the ZONE_OFF (Zone Offset) opcode had been used in the program, the set point sent to the specified zone instrument would have the offset added.  For example, a 3-zone pit furnace, where the bottom zone usually has a higher set point. The middle zone and the top zone usually have a lower set point.  The bottom zone temperature controller is assigned to zone 1, the middle temperature controllers to zone 2, and the top zone controller to zone 3. 

 

If the first three steps of a program are as shown below, then the bottom zone set point is 1775, the middle zone is 1750, and the top zone is 1800.

 

Step

Opcode

Temperature

 

Option

1

ZONE_OFF

25

 

Zone 1

2

ZONE_OFF

50

 

Zone 3

3

SETPT    

1750

 

 

 

The first step sets the offset for zone 1 to 25 degrees; therefore, the bottom zone controller would be sent a set point of 1775 when step 3 is executed.  Likewise step 2 sets the offset for zone 3 to 50 degrees.  The top zone then receives a set point of 1800.  The middle zone controller would receive the 1750. The temperature controller displayed on the Status Display is instrument #2.   If instrument #2 were the top zone controller then the Status Display would show the 1800-degree set point. 

 

Assignments:

The zone assignment number, with a choice of Assignment 1 through Assignment 5.

 

Temp Instrument Number:

The Client instrument number assigned to a temperature controller, with a range of 1 to 28.

 

Temp Zone Number:

This option will allow the user to set the zone number for the assignment with a range of 0 to 5.

 

Default Zone Offset, temp:

This option will allow the user to enter an offset for the assignment with a range of –32000 to 32000.