M4557 - Model 9210 Nitriding Controller
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 entered in the 24 hour format (i.e. 2:30pm is 14:30).
TZ_INQ The zone temperature inquiry is used to wait for the actual control zone temperature to reach the value specified in the Temperature data.
The options are:
•wait, reach within band
•wait up, reach or exceed the set point
•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 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.
VALVE SETPOINT This opcode is used to set the flow rate of gas for each valve. The temperature data is the Setpoint Value. The atmosphere data is the Trim Range. The option data is the valve.
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.
Z_SETPT This opcode is used to set the temperature and/or atmosphere set points for a zone. Either or both of the set points can be specified. The options are None, Wait, Wait Up, or Wait Down. If both set points are specified, the Wait applies to both.
SSi Manual SERIES | Page 47 of 47 |