SSI America 9200 - page 61

Model 9200 Programmable Dual-loop Controller
SSi Manual SERIES 9200 61 Programmable Dual-loop
The options are:
• wait, reach within band;
• wait up, reach or exceed the specified value;
• or wait down, reach or be less than the specified value.
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.
QUENCH The QUENCH “opcode” is used to start a quench cycle. The quench
cycle is independent of any program that is running. The temperature data is the quench
temperature controller set point. The atmosphere data is the quench time in minutes. The option
data can be used to control the agitator speed, high or low, by event # 6 Event # 6 OFF equals
low speed, and Event # 6 ON equals high speed. The quench temperature controller must be
Aux
Instrument # 4
. The quench cycle starts when the “opcode” is executed. The setpoint is sent to
the quench temperature controller, the timer is started, and the high speed event is turned on if it
is selected. When the quench timer times out, the end of quench cycle (event # 7) is turned on for
one second and the high speed event is turned off.
RAMP This “opcode” changes the temperature setpoint and/or the atmosphere setpoint linearly over time.
The option data is the total ramp time in minutes. The temperature data specifies the final
setpoint for the temperature setpoint. The atmosphere data specifies the final value for the
atmosphere setpoint.
RAMPR This “opcode” changes the temperature setpoint at a rate of degrees per minute. The option data
is the final Temperature Setpoint and rate of degrees per minute.
RESET This “opcode” is used to
clear all stacks and timers and start a program. The temperature data is interpreted as a program
number and the atmosphere data as a program step. The option data is not used. The RESET is
useful in a weekend shut down program to restart the normal operating program.
SET_AUX The Set Auxiliary Instrument Setpoint “opcode” is used with other instruments in the process
such as flow control or belt speed. The temperature data is the setpoint and the option data is the
instrument number.
SET_FACT This “opcode” is used to set the CO factor or the H2 factor of the atmosphere controller. If the
atmosphere type for the loop is set to dew point then the H2 factor is set; otherwise the CO factor
is set.
The temperature data is not used.
The atmosphere data is used as the factor with decimal places ignored.
The option data is wait, wait up, or wait down. This allows the control loop to recover from the
change before continuing the program.
SET_WAIT This “opcode” sets the band limits for the wait option or Inquiry “opcode”s. The temperature
data specifies the temperature band (i.e. +/- the value) and the atmosphere data specifies the
atmosphere band.
SETPT This “opcode” is used to set the temperature and/or atmosphere setpoints. Either or both of the
setpoints can be specified. The options are None or Wait. If both setpoints are specified the Wait
applies to both.
SOAK This “opcode” is an unconditional soak for the time (in hours and minutes) specified in the option
data.
TC_INQ The temperature inquiry is used to wait for the actual control temperature to reach
the value specified in the “temp” field.
The options are:
• wait, reach within band;