Super Systems 9200 - Manual (Page 43)

Model 9200 Programmable Dual-loop Controller
SSi Manual SERIES 9200 43 Programmable Dual-loop
• wait up, reach or exceed the set point;
• or wait down, reach or be less than the set point.
The default band can be set under the Configuration Menu and is typically 15 degrees. The band
limit can be changed by the S ET_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 that would be used to start a process or subroutine at a
specific hour and minute. The option data is the time in 24-hour format (i.e. 2:30pm is 14:30).
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.