Owner manual

Watlow EZ-ZONE
®
PM Integrated Controller • 119 • Chapter 9 Features
Changing PM Integrated Model Number to PM Express ...........121
How to Change the Control Model Number to a PM Express .......122
How to Restore Original PM Model Number ...................122
Tuning the PID Parameters ...............................123
Autotuning with TRU-TUNE+
®
..............................124
Inputs .............................................125
Calibration Offset ........................................125
Calibration .............................................125
Filter Time Constant ......................................126
Sensor Selection ......................................... 127
Sensor Backup ..........................................127
Scale High and Scale Low .................................127
Range High and Range Low ................................127
Receiving a Remote Set Point ..............................128
Ten Point Linearization ....................................128
Outputs ............................................128
Duplex ................................................128
NO-ARC Relay ..........................................129
Retransmitting a Process Value or Set Point ...................129
Cool Output Curve .......................................130
Resetting a Tripped Limit ................................130
Control Methods ......................................131
Output Configuration ..................................... 131
Auto (closed loop) and Manual (open loop) Control .............131
On-Off Control .......................................... 132
Proportional and (P) Control ...............................132
Proportional and Integral (PI) Control ........................133
Proportional, Integral and Derivative (PID) Control ..............133
Dead Band .............................................133
Variable Time Base .......................................134
Single Set Point Ramping ..................................135
Cascade Control .........................................135
Compressor Control ...................................... 135
Differential Control .......................................136
Ratio Control ...........................................136
Duplex Control ..........................................136
Motorized Valve Control ...................................136
Alarms .............................................136
Process and Deviation Alarms .............................. 136
Alarm Set Points .........................................136
Alarm Hysteresis ........................................137
Alarm Latching .......................................... 137
Alarm Silencing .........................................137
Alarm Blocking .......................................... 137
Current Sensing ......................................138
Open Loop Detection ...................................138
Programming the EZ Key/s ...............................138
9
Chapter 9: Features