E5AX-BA/BAH/E5EX-BA/A02/A03
E5AX-BA/BAH/E5EX-BA/A02/A03
14
AL (Alarm Mode):
al
(SW203, ALM2)
When “
al
” is displayed on the PV display in level 2, alarm output
mode or the present setting of the corresponding alarm mode selec-
tor (SW203, ALM1/SW204, ALM2) is displayed on the SV display.
The following table shows the messages that may be displayed.
Display
Alarm mode
No display
No alarm
)--(
Upper- and lower-limit alarm
---(
Upper-limit alarm
)---
Lower-limit alarm
-()-
Upper- and lower-limit range
alarm
3--e
Upper- and lower-limit alarms
with standby sequence
---e
Upper-limit alarm with
standby sequence
3---
Lower-limit alarm with
standby sequence
1--(
Absolute-value upper-limit
alarm
)--1
Absolute-value lower-limit
alarm
Unit No.:
u-no
Each Temperature Controller must have a unit number to communi-
cate with the host computer. When “
u-no
” is displayed on the PV
display, use the Up and Down Keys to set an integral number of 0
through 99 as the unit number. The selected unit number will appear
on the SV display. The unit number of each Temperature Controller
must be different from one another or an error will result. The unit
number is factory-set to 0.
Baud Rate:
bps
Each Temperature Controller must have a baud rate of 150, 300,
600, 1200, 2400, 4800 or 9600 bps to communicate with the host
computer. When “
bps
” is displayed on the PV display, use the Up
and Down Keys to set a baud rate on the Temperature Controller.
The selected baud rate will appear on the SV display, which, howev-
er, will be effective only after the power to Temperature Controller is
turned off once and turned on again. The baud rate is factory-set to
9600 bps.
Starting Control Operation
The E5EX will start control operations as soon as power is turned on
until power is turned off. Turn off the power and then turn it back on
after setting the desired parameters.
Auto-tuning
When the Auto-tuning Key is pressed for 1 second minimum, the
Temperature Controller automatically starts tuning the PID con-
stants. While auto-tuning is in operation, the auto-tuning indicator
on the front panel will flash. The Temperature Controller executes
control based on the set PID constants (factory-set to P = 40
°
C/
°
F, I
= 240 seconds, and D = 60 seconds) until the temperature of the
controlled system reaches the main setting. After that, the Tempera-
ture Controller automatically adjusts the PID constants using the
limit cycle method.
When the auto-tuning indicator turns off, the auto-tuning is termi-
nated and PID constants are renewed.
Auto-tuning can be carried out regardless of whether the Tempera-
ture Controller is performing reverse (heating) or normal (cooling)
operation. To stop auto-tuning, press the Auto-tuning Key again for
1 second minimum. Auto-tuning can be executed at any time: at
power application, while the temperature is rising, or after the con-
trol action has stabilized.
Limit Cycle Method
The optimum PID constants are calculated by varying the control
output value and generating external oscillation.
Main
setting
Previous PID
constants
New PID constants
AT indicator flashes
