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 9215 program to change set points on all instruments of a multi-zone furnace. The 9215 has up to five temperature and atmosphere zone assignments available (Zone Assignment 1 – Zone Assignment 5). Typically, the first zone is configured to the programmer’s atmosphere or 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.

When using the multi-zone offset feature, the temperature controller assigned as instruments 1 and 2 should be in zones that will not be offset.

Atm Source

This will allow the user to set the atmosphere instrument for the zone assignment. The options are

Loop 1 Instrument 5 Instrument 12 Instrument 19

Loop 2 Instrument 6 Instrument 13 Instrument 20

Loop 3 Instrument 7 Instrument 14 Instrument 21

Instrument 1 Instrument 8 Instrument 15 Instrument 22

Instrument 2 Instrument 9 Instrument 16 Instrument 23

Instrument 3 Instrument 10 Instrument 17 Instrument 24

Instrument 4 Instrument 11 Instrument 18 Instrument 25

Atm Zone Number

This option will allow the user to set the zone number for the assignment. The range is 0 – 5.

Atm Zone Offset

This option will allow the user to enter an offset for the assignment. The range is -4000 – 4000.

Temp Source

This will allow the user to set the temperature instrument for the zone assignment. The options are: