Model 9200 Programmable Dual-loop Controller
•wait up, reach or exceed the setpoint;
•or wait down, reach or be less than the setpoint.
The default band can be set under the configuration menu and is typically 15degrees. The band limit can be changed by the SET_WAIT “opcode”.
The LIMIT “opcode” immediately following this “opcode” sets a time limit on the wait.
A BRANCH “opcode” immediately following this “opcode” can be used to change the program flow based on the inquiry results.
TOD_INQ This “opcode” is a time of day inquiry which would be used to start a process or subroutine at a specific hour and minute. The option data is the time in
ZONE_OFF The Zone Offset “opcode” is used to set an offset to be added to the set point sent to a specific zone. Either temperature, atmosphere, or both can be offset. The same loop (furnace) can have different offsets for each zone. The zones must be defined in the zone configuration.
For example, a pit furnace has three zones: top, middle, and bottom.
The zones could be defined as:
•top = zone 1,
•middle = zone 2 ,
•bottom = zone 3.
If the ZONE_OFF “opcode” is used in a program with temperature data = 50 and zone = 1, then a temperature set point value in the following steps of 1700 would be sent to the middle and bottom as 1700 and the top as 1750.
SSi Manual SERIES 9200 | 62 | Programmable |
