Nor-Cal IQ+ Adaptive Pressure Controller - Manual (Page 17)

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IQ+ OP-LIT 9/08
6.1 - How to Configure IQ+ for your System
(continued)
FIGURE 6.4 – SPEED TOO HIGH FIGURE 6.5 – SPEED TOO LOW
System Configuration Commands
DeviceNet Commands
Class ID 33
hex
Instance ID 1 (Process Control)
attrIBute Id hex acceSS code name Format value
64 OE (get) 10 (set) Volume INT 1-100, default = 0
65 OE (get) 10 (set) Delay INT 0-10, default = 0
66 OE (get) 10 (set) Speet INT 1-100, default = 100
TAbLE 6.4 – DEvICENET COmmANDS
TAbLE 6.5 – RS-232 SERIAL COmmANDS
SerIal command deScrIPtIon reSPonSe
SVxxx Set Volume where xxx is a number from 1 to 100 PID VOLUME: xxx
SDxxx Set Delay where xxx is a number from 1 to 10 PID DELAY: xxx
SSxxx Set Speed where xxx is a number from 1 to 100 PID SPEED: xxx
TAbLE 6.6 – RS-232 SERIAL REQUESTS AND RESPONSES
SerIal requeSt deScrIPtIon reSPonSe
RV Requests Volume value PIC VOLUME: xxx
RD Requests Delay value PID DELAY: xxx
RS Requests Speed value PID SPEED: xxx
RPI Requests values of Volume, Delay and Speed SPEED: xxx
VOLUME: xxx
DELAY: xxx
A Record the current Volume, Delay, and Speed parameters.
b For serial interface set the serial port speed 100ms or less. For Devicenet
set to 50ms. Or less.
C Start pressure control at a process critical set point, or a set point halfway
between the system maximum and minimum process pressure set points.
With the system GUI or a PC that can graph data observe the pressure and
valve movement.
D If the pressure parameters need adjusting stop pressure control and Open
the valve. Enter new value for pressure parameters.
Parameters are adjusted in this order: volume
Delay
Speed (not normally adjusted)
E If the pressure response is satisfactory, input a set point at the system
minimum pressure or another process critical set point. Make adjustments
as necessary. If a change was made re-check pressure set point in step C.
F If the pressure response is satisfactory, input a set point at system maxi-
mum pressure. Adjust if necessary. If a change was made re-check set
points in steps C and D.
G Record new parameters for Volume, Delay, and Speed.
Setting Volume, Delay and Speed
Setting Volume, Delay and Speed (Example)
The system has a 1 Torr pressure gauge. The pressure control range is
20mTorr - 600 mTorr. The process critical range is 120mTorr.
A Record values of Volume, Delay, and Speed.
b Start pressure control with a set point 120mTorr. Adjust the parameters if
necessary.
C Start pressure control with a set point of 20mTorr. Adjust parameters if
necessary. If any changes are made then re-check the 120mTorr set point.
D Start pressure control at 600mTorr.. Adjust the parameters if neces-
sary. If any changes are made then re-check the 120mTorr and 20mTorr set
points.
E Record new values of Volume, Delay, and Speed.