Model 9200 Programmable Dual-loop Controller
Zone Assignments
WARNING: This screen should not be changed without consulting SSi at 800-666-4330.
The zone assignment feature allows the SERIES 9200 program to change set points on all instruments of a multi-zone furnace. The SERIES 9200 has up to five (5) temperature and atmosphere zone assignments available. The SERIES 9200 programmer looks for appropriate zone assignments whenever a set point is to be sent to the atmosphere or temperature controller. The temperature set point is sent to every instrument number in the temperature zone assignment.
If the ZONE_OFF (Zone Offset) “opcode” had been used in the program the set point sent to the specified zone instrument will 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 1725, the middle zones are 1750, and the top zone is 1800.
Step | “opcode” | Temperature Atmosphere | Option |
1 | ZONE_OFF | 50 | 1 |
2 | ZONE_OFF | 25 | 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 1725 when step 3 is executed. Likewise step 2 sets the offset for zone 4 to 50 degrees. The top zone then receives a set point of 1800. The middle zone controller would receive the 1750. The
SSi Manual SERIES 9200 | 31 | Programmable Dual-loop |
