Omron E5AX-P Series User manual

1
Temperature Controller E5AX-P
A 96 x 96 mm (DIN) Controller for
Control Valves
Controls motor valves without a potentiometer.
Optimum PID control with feed-forward control
circuitry.
High precision regardless of the set temperature.
Compatible with various inputs (input selected via
internal switch).
Models with communications capabilities also
available.
Ordering Information
Electronic Temperature Controller
Communica-
tions
None RS-232C RS-422* RS-485* BCD Transmission
output*/**
(4 to 20 mA)
Communications
Board Add-on Type
Model E5AX-PRR E5AX-PRR01 E5AX-PRR02 E5AX-PRR03 E5AX-PRR20 E5AX-PRRF E5AX-PRRM
*The Controller can also be equipped with a terminal block to connect communications. Specify a terminal block by adding “-X” to the model
number. Example: E5AX-PRR02-X
**Capable of transmitting the process value or output value, but remote setting by external input is not possible.
Temperature Ranges
Input (switch
selectable)
Thermocouple Temperature
resistance
thermometer
K
Chromel vs.
alumel
J/L
Iron vs.
constantan
T/U
Copper vs.
constantan
E
Chromel
vs.
constantan
R
Platinum vs.
platinum
13% rhodium
S
Platinum vs.
platinum 10%
rhodium
PT platinum
resistance
thermometer
(Pt100/JPt100)
Range %C–200 to 1,300 –100 to 850 –200 to 400 0 to 600 0 to 1,700 0 to 1,700 –99.9 to 450.0
%F–300 to 2,300 –100 to 1,500 –300 to 700 0 to 1,100 0 to 3,000 0 to 3,000 –99.9 to 800.0
Resolution (%C/%F)
(main settings and
alarm)
1 0.1
Communications Boards
Communications RS-232C RS-422 RS-485 BCD Transmission output
(4 to 20 mA)
Model E53-X01 E53-X02 E53-X03 E53-X20 E53-XF

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Specifications
Ratings
Supply voltage 100 to 240 VAC, 50/60 Hz (either frequency applicable with same unit)
Operating voltage range 85% to 110% of rated supply voltage
Power consumption Approx. 10 VA (at 100 VAC) to 15 VA (at 240 VAC)
Approx. 12 VA (at 100 VAC) to 15 VA (at 240 VAC) with communication function
Input Thermocouple (K/J/T/E/R/S/L/U) or platinum resistance thermometer (Pt100/JPt100)
selectable
Potentiometer input 100 Wto 2.5 kW
Control output Relay output: open, close; SPST-NO contacts; 3 A, 250 VAC (resistive load); inrush current: 1
A max.
Control mode PID control with auto-tuning
Alarm output Relay output, SPST-NO contacts; 3 A, 250 VAC (resistive load)
Setting method Digital setting via Up and Down Keys
Indication method Digital indications (character heights PV: 15 mm and SV: 11 mm) (Color PV: red, SV: green)
Other functions Upper and lower limits for set value
Key protection
Input shift
Display unit selection (%C/%F)
Normal and reverse output selection
Valve position display
Motor calibration function
Watchdog timer function (Detects failures in the CPU and restores the CPU.)
Manual output (balanceless-bumpless operation switchable)
Communications
Protocol RS-232C, RS-422, RS-485 BCD Transmission output
Transmission method Half-duplex Data select code 4 to 20 mA DC
Load: 600 Wmax.
Resolution: Approx. 3,200
Synchronization method Start-stop synchronization --- ---
Baud rate 150/300/600/1,200/2,400/4,800/9,600 bps
Transmission code ASCII (7-bit)
Communications Write to
Temperature
Controller
Main setting, set alarm value, proportional
band, integral time, derivative time, AT
start/stop etc.
Main setting, set
alarm value
Write disabled
Read from
Temperature
Controller
Main setting, set alarm value, proportional
band, integral time, derivative time, set
limit value, process value, valve position,
error codes, etc.
Main setting, set
alarm value,
process value, error
codes, etc.
Process value (see note 3),
valve position
Note: 1. The maximum total cable length must not exceed the following limits.
RS-422: 500 m; RS-232C: 15 m; RS-485: 500 m
2. A maximum of 32 Temperature Controllers can be connected to one host computer using serial communications (RS-422, RS-485).
3. Outputs the temperature data within the set limits.

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Characteristics
Setting accuracy (+0.3% of set value or +1%C, whichever greater), +1 digit max.
Indication accuracy (+0.3% of set value or +1%C, whichever greater), +1 digit max. (Set value coincides with the
indicated value, because no relative error exists between both values.)
Disable band 0.1% to 10.0% (in units of 0.1%)
Proportional band 0.1%to 999.9 %C/%F (in units of 0.1%C/%F)
Integral time 1 to 3,999 s (in units of 1 s)
Derivative time 0 to 3,999 s (in units of 1 s)
Alarm output setting range Thermocouple: –999%to 9,999%C/%F (in units of 1%C/%F)
Platinum resistance thermometer: –99.9%to 999.9%C/%F (in units of 0.1%C/%F)
Alarm output hysteresis 0.0%to 999.9 %C/%F (in units of 0.1%C/%F)
Sampling period 500 ms (temperature sensor input)
Output refresh period 500 ms
Display refresh period 500 ms (temperature sensor input)
Valve travel indication –99% to 999% (in units of 1%)
Full Open/close time 1 to 999 s ( in units of 1 s)
Input shift Thermocouple: –999%to 9,999%C/%F (in units of 1%C/%F)
Platinum resistance thermometer: –99.9%to 999.9%C/%F (in units of 0.1%C/%F)
Insulation resistance 20 MWmin. (at 500 VDC)
Dielectric strength 2,000 VAC 50/60 Hz for 1 min between terminals of different polarities
Vibration resistance Malfunction: 2 to 55 Hz, 2G 10 min each in X, Y, and Z directions
Destruction: 10 to 55 Hz, 0.75-mm double amplitude 2 hrs each in X, Y, and Z directions
Shock resistance Malfunction: 200 m/s23 times each in 6 directions
Destruction: 300 m/s23 times each in 6 directions
Life expectancy Mechanical: 10,000,000 operations min.
Electrical: 100,000 operations min.
Ambient temperature Operating: –10%to 55%C (with no icing)
Storage: –25%to 65%C (with no icing)
Ambient humidity Operating: 35% to 85%
Memory protection Non-volatile memory
Enclosure ratings Front panel: IEC standard IP50
Rear case: IEC standard IP20
Terminals: IEC standard IP00
Weight Standard: Approx. 350 g; Communications: Approx. 480 g; Mounting bracket: Approx. 50 g
*The accuracy of U thermocouples under temperatures from –150%to 400%C (–240%to 700%F) is +2%C (+3.6%F) +1 digit. Accuracy is
reduced below –150%C (–240%F). The accuracy of R and S thermocouples under 0%to 200%C (0%to 400%F) is +3%C (+5.4%F) +1 digit.

E5AX-P E5AX-P
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Nomenclature
Auto-tuning Indicator
Flashes on and off every
second when auto-tun-
ing is taking place.
Display Key
Press to shift the display
to the next parameter.
Level Key
Press for 2 seconds mini-
mum to change levels to
set different groups of pa-
rameters.
Open Output Indicator
Lights when the open out-
put is ON.
Manual Output Mode In-
dicator
Lights when in manual
output mode.
Process Value (PV) Display
Displays the process value, the character for
parameter being displayed on the SV display
and error messages.
Set Value (SV) Display
Displays main setting and other
parameters.
Alarm Indicator
Lights when the alarm output is ON.
A/M Key (Automatic/Manual)
Press for 1 second minimum to switch
between auto output mode and manual
output mode.
Up Key
Press to increase the main setting or
other parameters. Successively in-
creases the value when held down.
Down Key
Press to decrease the main setting or other
parameters. Successively decreases the
value when held down.
Front Cover
Close Output Indicator
Lights when the close out-
put is ON.
Operation
NOTICE: Always turn off the power supply to the Electronic Temperature Controller before changing any switch settings.
Settings
1. Remove the internal mechanism from the housing. Lift the
internal mechanism while pressing the hook at the bottom of
the front panel.
Hook
Pull out the internal mechanism
while holding down the hook with
your finger.
2. Four internal switches must be set on the E5AX: the
temperature sensor selector, the operating mode selector,
and the alarm mode selectors 1 and 2.
The figures show the locations of these switches and the
protection switches on the internal mechanisms. The
protection switch can be used to disable key operation.
Protection switch
(SW101, PROTECT)
Operating mode selector
(SW 201, FUNCTION)
Alarm mode selector
(SW205, ALM) Temperature sensor selector
(SW206, INPUT)
Temperature Sensor Selector (SW206,
INPUT)
This selector selects the temperature sensor to be used. It is facto-
ry-set to position 2 to designate a K-type (chromel-alumel thermo-
couple) temperature sensor. The following table lists the other pos-

E5AX-P E5AX-P
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sible settings for temperature sensors. Refer to temperature range
charts under Ordering Information for further information.
The scale displayed (%C or %F) is selected by the operating mode
selector (SW201).
Switch
setting
Temperature
sensor code
Temperature range
%C%F
0R0 to 1,700 0 to 3,000
1S0 to 1,700 0 to 3,000
2K–200 to 1,300 –300 to 2,300
3J–100 to 850 –100 to 1,500
4T–200 to 400 –300 to 700
5E0 to 600 0 to 1,100
6JPt100 –99.9 to 450.0 –99.9 to 800.0
7Pt100 –99.9 to 450.0 –99.9 to 800.0
8L–100 to 850 –100 to 1,500
9U–200 to 400 –300 to 700
Operating Mode Selector (SW201,
FUNCTION)
This DIP switch selects the operation modes listed in the following
table.
Function Pin
number
Pin
setting Control setting
Not used.* 1Leave turned OFF.
Control output 2 ON Normal (cooling)
OFF Reverse (heating)
Input shift 3 ON Enabled
OFF Disabled
SP (set point)** 4 ON Enabled
protection cancel OFF Disabled
Display unit 5 ON %F
OFF %C
PID display 6 ON Enabled
OFF Disabled
*Always operate with pin 1 OFF. Operating with pin 1 ON could re-
sult in malfunction.
**SP protection cancel is effective only when SW101 (key protec-
tion) is on. If the SP protection cancel is ON, key protection (SW101
ON) will not apply to the set point, i.e., you will be able to change the
set point regardless of the setting of SW101.
Alarm Mode Selector (SW205: ALM)
Alarm mode selector is provided on all E5AX Temperature Controllers. Alarm modes, listed in the following table, can be selected using this
switch. The switch is factory-set to position 2, i.e., the upper-limit alarm mode.
Switch Mode (SW205) Alarm output Setting range
setting Alarm operation Display When X is positive When X is negative
0No alarm No display OFF ---
1Upper- and lower-limit
alarm )––( XX --- Thermocouple: 0%to 9,999%C/%F
Platinum resistance thermometer:
0%to 999.9%C/%F
2Upper-limit alarm –––( X X Thermocouple: –999%to
9,999%C/%F
3Lower-limit alarm )––– X X Platinum resistance thermome-
ter: –99.9%to 999.9%C/%F
4Upper- and lower-limit
range alarm –()– XX --- Thermocouple: 0%to 9,999%C/%F
5Upper- and lower-limit
alarm with standby se-
quence
3––e XX --- Platinum resistance thermometer:
0%to 999.9%C/%F
6Upper-limit alarm with
standby sequence –––e X X Thermocouple: –999%to 9,999%C/%F
7Lower-limit alarm with
standby sequence 3––– X X Platinum resistance thermome- ter: –99.9%to 999.9%C/%F
8Absolute-value alarm 1––( Y
0%C
Y
0%C

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Key Protection Switch (SW101, PROTECT)
When the key protection switch is set to the ON position, the Level Key, Up and Down Keys, and Auto-tuning Key cannot be operated. In effect,
the Temperature Controller is write-protected and the set values (such as the alarm value) can be read out only. The set point, however, will not
be protected if the SP protection disable is turned ON (pin 4 of SW201).

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Motor Calibration: calb
The following setting are used to set the opening/closing time for controlling valves. Always set the following parameters when installing the
controller. If a display is required for valve position, set the open and close positions at the same time.
–200
sl–l
calb
fr–l
fr–l
mot
30
Press a.
Press a.
Press a.
Press a.
Press the UP and Down
keys simultaneously.
Lower setting limit
Motor calibration display
Count value
Count value
Fully open position
Fully close position
Fully open/close time
PV
SV
a
Settings when Not Using a Potentiometer (No Valve Position
Display)
1. Turn on power and press the Level Key for at least two
seconds. sl–l will be displayed. Then press the Display Key
until calb is displayed.
This is the initial mode when power is turned on for the first
time.
2. Simultaneously press the Up and Down Keys for at least one
second. fr–h will be displayed and the OPEN output will turn
ON.
3. Press the Display Key. fr–l will be displayed, the OPEN output
will turn OFF, and the CLOSE output will turn ON.
4. Press the Display Key. mot will be displayed and the CLOSE
output will turn OFF. While mot is displayed, use the Up and
Down Keys to set the fully open/close time to a value between
1 and 999 s in the units of 1 s.
5. Press the Display Key. sl–l will be displayed and motor
calibration will be complete. Press the Level Key for at least
two seconds, confirm that in–t is displayed, and then press
the Level Key again for at least two seconds to display the
process value and return to the initial display mode.
Settings with a Potentiometer (with Valve Position Display)
1. Turn on power and press the Level Key for at least two
seconds. sl–l will be displayed. Then press the Display Key
until calb is displayed.
This is the initial mode when power is turned on for the first
time.
2. Simultaneously press the Up and Down Keys for at least one
second. fr–h will be displayed, the OPEN output will turn ON,
and the valve will start to open. Press the Display Key as soon
as the valve stops by the limit switch built into the motor. The
count value for the fully open position will be set.
3. Press the Display Key. fr–l will be displayed, the OPEN output
will turn OFF, the CLOSE output will turn ON, and the valve
will start to close. Press the Display Key as soon as the valve
stops by the limit switch built into the motor. The count value
for the fully close position will be set.
4. Press the Display Key. mot will be displayed and the CLOSE
output will turn OFF. The automatically set fully open/close
time will be displayed. Use the Up and Down Keys to adjust
the setting if required (value must be between 1 and 999 s in
the units of 1 s).
5. Press the Display Key. sl–l will be displayed and motor
calibration will be complete. Press the Level Key for at least
two seconds, confirm that in–t is displayed, and then press
the Level Key again for at least two seconds to display the
process value and return to the initial display mode.
WARNING
Never calibrate the motor during control operation. Make sure
that control operations have been stopped before calibrating.
Note: 1. The output mode cannot be changed in motor calibra-
tion mode.
2. If the fully open position is less than the fully closed posi-
tion, the value position will not be displayed and the dis-
play will show “a––– ” for automatic and “m––– ” for manu-
al operation. If a potentiometer is not being used for
feedback, press the Display Key at steps 2 and 3 without
regarding the position of the valve and then set the fully
open/close time. Here too, the display for value position
will show “a––– ” for automatic and “m––– ” for manual
operation.

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Inputting Parameters
The Temperature Controller has three display levels, 0, 1, and 2, in which only specific parameters can be set. Level 0 is the initial and is auto-
matically entered at power application. To change the mode to set or change a different group of parameters, hold down the Level Key for 2
seconds minimum. The display level mode changes as shown below. Actual displays vary with models and switch settings. If a display does not
appear as expected, check your switch settings.
––––––– ––––––– –––––––
Level 0
Power ON Level 1 Level 2
Press the Level Key. Press the Level Key. Press the Level Key.
Valve travel, main set-
ting, alarm set value,
input shift, PID con-
stants
Lower/upper setting limit,
alarm hysteresis, disable
band, motor calibration, Fully
open/close position, Fully
open/close time
Input type, alarm mode
Level 0
Process value
m 0
Process value
0
Press a.
a 0
al
0
in–5
0
p
40.0
i
240
d
40
Press a.
Press a.
Press a.
Press a.
Press a.
Press a.
Press a.
Valve travel
Main setting
Valve travel
Alarm value
Input shift
Proportional band
Integral time
Derivative time
(Note 1)
(Note 2)
(Note 3)
(Note 4)
(Note 5)
(Note 5)
(Note 5)
Process value
PV
SV
Note: 1. Not displayed in automatic output mode. “m––– ” will be
displayed if a potentiometer is not connected.
2. Not displayed in manual output mode. “a––– ” will be dis-
played if a potentiometer is not connected.
3. Not displayed when the alarm is disabled (SW203 set to
0 or 9).
4. Not displayed when the input shift display is disabled
(SW201, pin 3 OFF).
5. Not displayed when PID display is disabled (SW201, pin
6 OFF).
Main Setting
The set point can be changed with the Up and Down Keys.
Valve Travel
The value travel can be monitored. If a potentiometer is not con-
nected, the display will show “a––– ” for automatic and “m––– ” for
manual operation. While “m ” is displayed in manual output mode,
the Up Key will turn ON the OPEN output and the Down Key will turn
ON the CLOSE output.
Selecting the Output Mode
The A/M Key can be pressed for one second or longer to change
between the automatic and manual output modes. The balance-
less-bumpless function will operate to prevent the output from
changing abruptly.
Automatic Output Mode
In automatic output mode, the control will function automatically.
When the A/M Key is pressed and the automatic output mode is first
entered, displays like the following will appear (display level 0).
123
80
PV
SV
Process value
Main setting
Manual Output Mode
In manual output mode, the controller can be operated with the Up
and Down Keys. The Up Key will turn the OPEN output ON and light
the OPEN indicator. The Down Key will turn ON the CLOSE output
and light the CLOSE indicator.
When the A/M Key is pressed and the manual output mode is first
entered, displays like the following will appear (display level 0).
123
m 80
PV
SV
Process value
Valve position (%)
The MANU indicator will light and remain lit until the automatic out-
put mode is returned to.

E5AX-P E5AX-P
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Alarm: al
When al is displayed on the PV display, the alarm value for alarm
output can be set on the SV display. When the temperature exceeds
or falls below the set alarm value, the corresponding alarm output is
produced and the ALM indicator on the front panel lights. Usually,
the alarm value is set as a deviation from the main setting, but it can
also be set as an absolute value when the event alarm mode is se-
lected. Set the alarm value by using the Up and Down Keys while al
is displayed. The message is not displayed if the alarm mode selec-
tor is set to position 0. Factory-set to upper-limit, alarm value
0%C/%F
Input Shift: in–5
When pin 3 of the operating mode selector switch (SW201) is set to
the ON position, the input shift function can be used. This function is
used to shift the temperature display from the measured value by a
desired value, as shown by the examples in the following table:
Input shift value Temperature mea-
sured by sensor
Displayed
temperature
0 (without shift) 100%C 100%C
10 (shifted by
10%C)
100%C110%C
–10 (shifted by
–10%C)
100%C 90%C
This function can be used mainly for fine tuning compensation,
while leaving the set temperature unaffected. Select this function by
pressing the Display Key three times in display level 0.
Proportional Band: p
When the character pis displayed on the PV display, the propor-
tional band (P constant) can be changed using the Up and Down
Keys. The new value will be displayed on the SV display. It can be
set in a range from 0.1%to 999.9%C/%F in units of 0.1%C/%F. The
factory setting is 40.0%C/%F.
NOTICE: The output value will change according to the differ-
ence between the set value and the present value when
the proportional band is changed during control operation.
If this difference is too great, a drastic change will result.
Always switch to the manual output mode before changing
the proportional band.
Integral Time (Reset Time): i
When the character iis displayed on the PV display, the integral time
(I constant) can be changed using the Up and Down Keys. It can be
set in a range from 0 to 3,999 seconds in units of 1 second. The fac-
tory setting is 240 seconds.
Derivative Time (Rate Time): d
The derivative time (D constant) can be changed when the charac-
ter dis displayed on the PV display using the Up and Down Keys. It
can be set in a range from 0 to 3,999 seconds in units of 1 second.
The factory setting is 40 seconds.
Level 1
–200
Press a.
Press a.
Press a.
Press a.
Press b r simultaneously.
Press a.
Press a.
Lower setting limit
(Note 1)
sl–l
sl–h
1300
hysa
0.2
db
2.0
calb
fr–h
fr–l
(Note 2)
Upper setting limit
Alarm hysteresis
Disable band
Motor calibration display
Fully open position
Fully closed position
Note: 1. Not displayed when the alarm is disabled (SW205
set to 0 or 9).
2. Motor calibration will be displayed when power is
turned on for the first time.
3. Displayed only when the motor calibration mode is
entered.
mot
30
(Note 3)
Fully open/close time
Count value
Count value
PV
SV
Press a.
Press a.

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Lower/Upper Limits of Setting Range: sl–l, sl–h
–200 0 400 1,300
SL-L SL-H
Basically, the temperature range that can be measured is deter-
mined by the temperature sensor to be used. For example, when a
K-type (chromel-alumel thermocouple) temperature sensor is se-
lected, the measurable range is from –200%C to 1,300%C. Howev-
er, this temperature range can be narrowed, for example, to 0%C to
400%C. To do this, set the lower-limit value of the temperature set-
ting range, in this case to 0%C, on the SV display by using the Up
and Down Keys while 5l–l is displayed on the PV display. Similarly,
set the upper-limit value, 400%C, while 5l–h is displayed. If the pro-
cess temperature falls below the set lower-limit value or exceeds
the set upper-limit value, it is displayed on the PV display within the
temperature range of the temperature sensor.
Hysteresis Alarm: hysa
The hysteresis alarm value for the alarm can be set in a range from
0.0%to 999.9%C while hysa is displayed on the PV display using the
Up and Down Keys. The factory setting is 0.2%C/%F.
Disable band: db
The disable band can be set in a range from 0.1% to 10.0% while db
is displayed on the PV display using Up and Down Keys. The factory
setting is 2.0%.
Motor Calibration: calb
Designate whether or not to perform motor calibration. To enter the
mode, simultaneously press the Up and Down Keys for at least one
second. Press the Display Key to return to sl–l.
WARNING
Never calibrate the motor during control operation. Make sure
that control operations have been stopped before calibrating.
fr–h Fully open position
fr–l Fully closed position
mot Opening/closing time
The motor is calibrated. Refer to page 9.
Level 2
In level 2, selected input sensor, and modes for alarm output can be
monitored. Note that level 2 is a monitoring level only and thus no
parameters can be changed. When the Level Key is pressed for 2
seconds minimum after power application, 5l–l is displayed on the
PV display. Hold down the Level Key again for 2 seconds minimum
to display oon the PV display. Then, selected input sensor, and
alarm modes can be monitored each time the Display Key is
pressed.
in–t
al
k ca
Press a.
Alarm mode
Input type
Press a.
–––(
Input Type: in–t
When in–t is displayed on the PV display, the present setting of the
input type selector (SW206), is displayed on the SV display. The fol-
lowing table shows the messages that may be displayed:
Display Sensor
rpr R
5pr S
kca K
jic J
tcc T
ecr E
jpt JPt100*
pt Pt100**
lic L
ucc U
*Meets JIS 1981.
**Meets JIS 1989, DIN.
AL (Alarm Mode): al
When al is displayed on the PV display in level 2, alarm output mode
or the present setting of the corresponding alarm mode selector
(SW205) 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––c Absolute-value alarm

E5AX-P E5AX-P
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Starting Control Operation
The E5AX will start control operations as soon as power is turned on
until power is turned off. If you don’t want control operations to be
performed while setting parameters, turn off the power and then turn
it back on after setting the desired parameters.
Auto-tuning
When the Level Key and Mode Key are pressed at the same time for
1 second minimum, the Temperature Controller automatically starts
tuning the PID constants. While auto-tuning is in operation, the au-
to-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, I = 240 seconds, and D = 40 seconds) until the tem-
perature of the controlled system reaches the set temperature. After
that, the Temperature Controller automatically adjusts the PID con-
stants using the limit cycle method. When the auto-tuning indicator
turns off, the auto-tuning is terminated and PID constants are re-
newed.
Main setting
Previous PID
constants New PID constants
AT indicator flashes
Limit Cycle Method: the optimum PID constants are calculated by
this method by varing the control output variable and generating ex-
ternal oscillation.
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, hold down the Level Key and Mode
Key again simultaneously for 1 second minimum. All settings will re-
turn to those prior to the beginning of auto-tuning. Automatic tuning
can be executed at any time: at power application, while the temper-
ature is rising, or after the control action has stabilized.
Error Messages
The Temperature Controller is provided with self-diagnostic functions, and will display an error message on the PV display when an error is
detected.
Message Cause Control output Alarm output
Normal Reverse
ffff Input temperature has exceeded the upper
limit of the temperature range by more than
20%C.
Open: OFF
Close: ON
Open: ON
Close: OFF
Sends alarm signal in ac-
cordance with the set
alarm mode.
–––– Input temperature has fallen below the lower
limit of the temperature range by more than
20%C.*
Open: ON
Close: OFF
Open: OFF
Close: ON
Sends alarm signal in ac-
cordance with the set
alarm mode.
5.err (flashes) The thermocouple has burned out or
short-circuit bar has been removed. The plati-
num resistance thermometer has burned out
or A and B terminals have been short-cir-
cuited.
Open: OFF
Close: ON
Open: ON
Close: OFF
Sends alarm signal in ac-
cordance with the set
alarm mode. Proportional
alarm output is OFF, how-
ever.
e111 (flashes)
e333 (flashes)
Memory failure (e111) or A/D converter failure
(e333) has occurred. Temperature Controller
must be repaired if recovery is not made by
turning power off once and on again.
Open: OFF
Close: OFF
Open: OFF
Close: OFF
OFF
*When the temperature resistance thermometer is used, this message is displayed when the temperature has fallen below -99.9%C.

E5AX-P E5AX-P
12
Dimensions
Note: All units are in millimeters unless otherwise indicated.
Communications connector
(RS-232C and BCD connector is shown.)
Communications board
(RS-422 and 485 terminals are shown.)
Communications board
(4 to 20 mA transmission output is shown.)
4 to 20 mA
transmission output
RS-422 RS-485
RDB
RDA
SG
SDA
SDB
Panel Cutout Side-by-side Mounting
of N Controllers
92+0.8
0
92+0.8
0 92+0.8
0
120 min.
L
L = (96N – 3.5)+1
0
_96 89
Mounting
Screw
12 11 5
2 to 10
SG
Installation
Note: 1. Connect a valve position indicator if required.
2. Do not connect unused terminals.
Control
output
Open
Close
Alarm output
Potentiometer
input
(see Note 1)
100 to 240 VAC, 50/60 Hz
Ground FG terminal 18 under
noise-interfered environment.
Use these terminals when connecting a platinum
resistance thermometer (remove short bar from
terminals 14 and 15).
Use these terminals when connecting a thermo-
couple (do not remove short bar from terminals
14 and 15).

E5AX-P E5AX-P
13
Precautions
Mounting
The dimensions of the Temperature Controller conform to DIN
43700. Recommended panel thickness is 1 to 8 mm.
Do not install the Temperature Controller in a location exposed to
excessive dust or corrosive gases. Moreover, avoid locations sub-
ject to heavy vibration or shock, water or oil spray, or high tempera-
tures. Any of these condition will affect product life.
Isolate the Temperature Controller from equipment that generates
strong, high-frequency noises such as high-frequency welders, be-
cause such equipment may prevent proper operation.
Attach the two mounting brackets supplied with E5AX on the top
and bottom of the Temperature Controller. Tighten the screws of the
mounting brackets with your fingers.
Mounting bracket
Connection Examples
With Solderless Terminal
Use M3.5 solderless terminals with the Temperature Controller’s
M3.5 self-rising pressure plate screws.
Solder-dipped Leads
Strip 6 to 12 mm of the lead wires and carefully arrange the wire tips.
Do not tighten the terminal screw with excessive force, because do-
ing so may damage them. The terminal block of the Temperature
Controller is constructed so that the lead wires can be connected to
all the terminals from the same direction.
Top
Bottom
Input Connection
To reduce inductive noise influence, the lead wires connecting the
input to the Temperature Controller must be separated from the
power lines and load lines.
Use the specified compensating conductors for thermocouples.
When using a thermocouple as the temperature sensor, attach the
short-circuit bar shown in the terminal block diagram on the hous-
ing. Use lead wires having a small resistance for temperature resis-
tance thermometers.
Be sure to remove the short-circuit bar from the terminals when a
temperature resistance thermometer is used.
Sequenced Circuits
Several seconds are required until the relay in turned ON after pow-
er has been supplied to the Temperature Controller. Therefore, take
this time delay into consideration when designing sequenced cir-
cuits which incorporate a Temperature Controller.
Stickers Inside Frontcover
Stickers indicating the temperature sensor type (R, S, K, J, T, E, L,
and U) are supplied with the Temperature Controller. Attach the
proper stickers to the front panel as shown below.
Sticker identifying input type

E5AX-P E5AX-P
14
OMRON Corporation
Temperature Control Devices Division
29th Fl., Crystal Tower Bldg.
1-2-27, Shiromi, Chuo-ku,
Osaka 540 Japan
Phone: [phone] Fax: [phone]
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
Cat. No. H54-E1-1A In the interest of product improvement, specifications are subject to change without notice.
Printed in Japan
0791-1M