Omega CN154, CN155, CN158, CN159 User Manual

- 3 -

(5) Near high voltage power lines or where inductive

interference can affect the operation of the product.
(6) Dew drops or direct exposure to sun light.
(7) Where the elevation is in excess of 2,000 m.

2-2.Mounting

(1) Machine the mounting hole by referring to panel cutout in

section 2-4.
(2) Applicable thickness of the mounting panel is from 1.0 to 3.5

mm.
(3) As this product provides mounting fixture, insert the product

from the front panel for installation.

2-3.How to remove the instrument out of the case

There is no need to remove your
CN150 series controllers out
of the case. Nevertheless, should the
need arise, for example, for
replacement, follow the steps
described below:
Insert a minus screwdriver of 6mm ~
9mm into the opening (where
packing is exposed) of the front case
and rotate the screwdriver while
pushing up the lock lever behind the
packing. Once the instrument comes
out by a few millimeters, you can
remove it by hand.

2-4.External dimensions and panel cutout

CN154/CN155 External dimensions CN154/CN155 Panel cutout

CN158/CN159 External dimensions CN158/CN159 Panel cutout

(unit : mm)

Note: The environmental conditions belong to the installation

category II of IEC 664 and the degree of pollution is 2.

When the instrument is removed/replaced in the case, make sure
the power is off. If it is done while the power is on, it may lead
to problems with the product and/or other problems.

ENT

MAN

PV

SV

˚C

OUT AT AH AH/HB MAN STBY COM

110

96 91.6

10010

130 min.

130 min.

92

+0.8
0

92

+0.8

0

110

10010

45

+0.6
0

(48 x N-3)

+1.0
0

92

+0.8

0

92

+0.8
0

130 min.

When N pieces are
installed laterally.
N= number

height 96

×

width 48

height 91.6

×

width 44.6

Dimension of current transformer (CT) for heater break
alarm

• For 0-30A (CTL-6-S)...................................For 0-50A (CTL-12-S36-8)

(unit : mm)

2-5.Wiring

(1) Wiring operation should be done according to the instruction

for the terminal arrangement in section 2-6. Exercise care
that no wrong connection is made.

(2) Crimp terminal should accommodate the M3.5 screw and

should have a width of less than 7mm.

(3) For thermocouple input, select the compensation wire

suitable to the thermocouple type.

(4) For R. T. D. input, leads should be less than 5Ω in resistance

and three leads should have the same resistance.

(5) Input signal line should be conducted safely apart from the

high voltage power line.

(6) Shield wiring (single point grounding) is effective for static

induction noise.

(7) Short interval twisted pair wire for input signal is effective

for electromagnetic induction noise.

(8) For power line, use wire or cable which is 1mm

2

or more in
sectional area and of which the performance is equal to or
higher than that of 600V vinyl insulated wire.

(9) Earth grounding should be performed with earth resistance

less than 100Ω and with wire thicker than 2mm

2

.

2-6.Terminal arrangement
SR73A

15

21

30
40

2.8

3

10.5

7.525

10

φ 5.8

2- φ 3.5

φ 12

φ 2.36

φ 12

940

15

7.5

2.3630

30

40

2-M3 depth 4

• Always disconnect this product from any power source
during wiring operation to prevent electrical shock.

• Be certain that the protective conductor terminal ( ) is
properly grounded. Otherwise, a serious electric shock may
result.

• Avoid touching the wired terminal and charged devices while
supplying power.

CAUTION

WARNING

422A 485

SG SG
SD+ +
SD– –
RD+
RD–

TC•mV

RTD

V•mA

IN PUT

1

2

3

4

5

6

7

+A

–B

8

9

B

10 20

21

SB

22

23

CT

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

L

11

12

13

14

15

16

17

18

19

N

COM+

NO –

NC

COM

AH

AL/HB

~

Power

CONTROL
OUTPUT

ALARM
OUTPUT

- 4 -

CN158/CN159

2-7.Terminal arrangement table

3. Instruction for front panel

3-1. Drawing and the name of the parts

This is an example of the front panel of CN154/CN155.

Name of parts



: Measured value

(PV) display



: Set value (SV)

display



: Monitor LED



: Key switches

10 20

23 24

19

18

17

16

15

14

13

12

2221

11

9

8

7

6

5

4

3

2

1

422A 485

RD–

RD+

SD– –

SD+ +

SG SG

L

N

COM+

NC

COM

AL/HR

AH

NO –

Power

CONTROL
OUTPUT

ALARM
OUTPUT

CT

SB

IN PUT

RTD

TC•mV

V•mA

+A

–B

B

~

Heater break alarm (option) CT input terminal

Name of terminal and description

Terminal number

CN150 Series

Power terminal
100-260V AC±10% 50/60Hz 12VA

Protective conductor terminal ( )
Input terminal

R. T. D. A, Thermocouple, Voltage, Current +
R. T. D. B, Thermocouple, Voltage, Current –
R. T. D. B

Output terminal
Contact: COM, SSR Drive voltage, Voltage,

Current +

Contact: NO, SSR Drive voltage, Voltage,

Current –

Contact: NC
Communication terminal

For RS-422A For RS-485

SG SG
SD+ +
SD– –

RD+

RD–

Alarm output (option) terminal
COM Contact rating 240V AC 1.5A

(resistive load)
AH Higher limit alarm
AL/HB Lower limit alarm or heater break alarm

Set value bias (option) input terminal

11-12

13

21-22
23-24

7
8

10

18

19
20

1
2
3
4
5

14

15

16

Note: For Thermocouple, Voltage, and Current input,

measurement error results by connection between B and
B terminal.

3-2. Instruction for front panel



: Measured value (PV) display (green)

(1) Displays current measured value on the mode 0 basic

screen.

(2) Displays parameter type on each parameter screen.



: Set value (SV) display (orange)

(1) Displays set value on the mode 0 basic screen.
(2) Displays selected item and set value on each parameter

screen.



: Monitor LED

(1) OUT (output) monitor LED (green)

• For contact or SSR drive voltage output, a light turns
on for output ON and turns off for output OFF.

• For current or voltage output, the light intensity
changes proportionally to the output altitude.

(2) AT (auto tuning) monitor LED (green)

• On selection by , ON turns on AT waiting
( key), flashes on AT execution.

(3) AH alarm output monitor LED (red)

• Turns on for higher limit alarm output ON.

(4) AL/HB alarm output monitor LED (red)

• Turns on for lower alarm output ON or heater break
alarm ON.

(5) MAN (manual control output) monitor LED (green)

• Flashes when control output is in manual operation.

(6) STBY (control output stop) monitor LED (green)

• Turns on when the control output stop mode is
selected.

(7) COM (communication) monitor LED (green)

• Turns on when the remote communication mode is
selected.



: Key switches

(1) (parameter) key

• Press on set screen to move to next set screen.

• Keep pressing three (3) seconds for function of move
key between basic screen of the mode 0 screen group
and direct call screen of mode 1 screen group.

(2) (down) key

• Press on the set screen to flash the point of the least
digit and to reduce data or back increment data.

(3) (up) key

• Press on the set screen to flash the point of the least
digit and to increase data of increment data.

(4) (entry/registration) key

• Press on the set screen of the mode 0 screen group
and mode 1 screen group to fix the data changed by
the , keys and to extinguish flash of the point.

• The function selecting screen, of the mode 2 screen
group, registers data of the point flashing digit and
simultaneously shifts a data changeable digit (the
point flashing digit).

• The input scaling screen, of the mode 2 screen group,
registers data and shifts a parameter capable of being
set (in the row in which the rightmost point is
flashing).

• Press the key for five seconds and it functions to
change the basic screen of the mode 0 screen group to
the function selecting screen of the mode 2 screen
group and vice versa.

(5) (manual) key

• Pressing this key on the control output screen changes
automatic control output to manual control output and
vice versa. During manual control output, the MAN
monitor LED flashes.

• The key does not function in the control output
stop mode.

ENT

MAN

ENT

MAN

PV

SV

OUT AT AH MAN STBY COMAH/HB

ENT

MAN

˚C

4

3

2

1

- 5 -

4. Screen instruction

4-1. Power on and initial screen display

After turning on power, the display shows each power on initial
screen for approx. 1.5 seconds, then moves into the basic screen
of the mode 0 screen group.

4-2.Alarm type code table

4-3.Screen change

(1) Screen change from mode 0 group to mode 1 group

• Pressing the key for three seconds on the basic screen
of the mode 0 screen group changes it to the direct call
screen of the mode 1 screen group and vice versa.

(2) Screen change from mode 0 group to mode 2 screen group

• Pressing the key for five seconds on the basic screen
of the mode 0 screen group changes it to the function
selecting screen of the mode 2 screen group and vice versa.

Measured value (PV)
Set value (SV)

Turning

on power

Series type ( )

,

Input type ( : Thermocouple, : R. T. D.,

Control output type : Contact : SSR drive voltage

: Current : Voltage

Lower limit of the selected measuring range
Higher limit of the selected measuring range

Power on initial screen

: Voltage (mV), : Voltage (V), : Current (mA))

Displays output screen

Mode 0 screen group basic screen

(3) Screen change within mode 0 screen group

• By pressing the key, the screen changes.

(4) Screen change within mode 1 screen group

• Two methods are used for screen change within mode 1
screen group. One is to press the key as shown on
above mode 0 screen group. The other is to mode the
screen directly by indicating screen No. on the top direct
call screen.

Example: Direct calling the screen No.8 PV bias value set

screen

(5) Selecting and setting digit to change of function selecting

screen of mode 2 screen group

• When the function selecting screen is displayed, the point
of selectable digit flashes.

• By pressing key, the selectable digit (digit whose
point is flashing) moves.

• In case of changing the set value, flash the point to be
changed with key, select data with the keys and
press key again to register the set value and move
selectable digit.

Example: changing the control output characteristics from

(heating) to (cooling)

* “.” on the screen shows the selectable digit (digit whose

point is flashing).

(6) Shifting setting items on input scaling screen of mode 2

screen group and setting method

• Pressing the key on the function selecting screen calls
the input scaling screen onto the display. The decimal
point in the rightmost position on the top row flashes.
Press the or key to change the lower limit value
and press the key to register the data.

• Upon registering the lower limit value data, the decimal
point in the rightmost digit in the bottom row begins to
flash. Change the higher limit value by pressing the
or key and register it by means of the key.

• Upon registering the higher limit value data, the decimal
points in the rightmost digits of the bottom and top rows
flash. Change the positions of the decimal points by
pressing the or key and register it by means of the

key.

• Each time the key is pressed, the flashing decimal
point in the rightmost digit moves from the top row→
bottom row→top and bottom rows→top row→.

• In case the lower limit value and the higher limit value are
set to produce a difference which is less than 100 counts or
more than 5000 counts, the higher limit value is forced to
change to +100 or +5000 counts. The higher limit cannot
be set to be less than a lower limit value +100 counts or
more than a lower limit value +5000 counts.

Alarm code

0 ( )
1 ( )
2 ( )
3 ( )
4 ( )
5 ( )
6 ( )
7 ( )
8 ( )

AH
assignment

Not assigned
Higher limit

deviation value
Higher limit

absolute value

Not assigned
Lower limit

deviation value
Lower limit

absolute value
Lower limit

deviation value
Lower limit

absolute value

Higher limit
deviation value

Higher limit
absolute value

Higher limit
deviation value

Higher limit
absolute value

Higher limit
deviation value

Higher limit
absolute value

With/Without
inhibit action

Without
inhibit action

Without
inhibit action

With
inhibit action

With
inhibit action

Without
inhibit action

Without
inhibit action

With
inhibit action

With
inhibit action

Without
inhibit action

Without
inhibit action

With
inhibit action

With
inhibit action

– – – – –

With/Without
inhibit action

– – – – –

– – – – –

– – – – –

– – – – –

– – – – –

AL/HB
assignment

Heater break

Heater break

Heater break

Heater break

Note: In the above table, the alarm codes 5 through 8 are

selectable when the apparatus has the optional function
of heater break alarm.

Note: In case of changing data and pressing key longer

than 5 seconds, the screen moves to mode 0 basic screen
without a data registration. It requires a data verification
with key and screen change.

1-0 direct call screen 1-0 direct call screen 1-8 PV bias value set screen

key

ENT

key

0-0 Basic Screen 1-0 direct call screen

key

3 seconds

ENT

0-0 Basic Screen 2-0 Function selecting screen

ENT

key

5 seconds

several times

point flashes

ENT

ENT

ENT

key

key

ENT

ENT

ENT

ENT

ENT

ENT

key

ENT

- 6 -

4-4.Instruction for screen change and each screen

0-0

0-1

0-2

0-3

0-4

0-5

0-6

Note: In the following, the mark

indicates that the key above
the mark should be pressed.

Mode 0 Screen Group

key
5 seconds

ENT

Basic screen

SV initial value: lower limit of measuring range
Setting range: within measuring range
Upper row displays measured value (PV) and lower row displays and
changes the set value (SV). Refer to Item 5-1 for detail.

Direct call screen (screen No.0)

Initial value: 0
Setting range: 0~19
Set the screen No. to move the screen of the mode 1 screen group.
Refer to Item 4-3 (4) for detail.
The screen with no display condition is skipped.

Set value bias set screen (screen No.1)

Initial value: 0
Setting range: -1999~2000 unit
Displays in the case with set value bias option. The set value is effective
during shorted SB terminal, and is added to the set value. While it is
valid, the leftmost point on the bottom row stays lit on each displayed
screen, excluding the input scaling setting screen.

Proportional band set screen (screen No.2)

Initial value: 3.0%
Setting range: OFF, 0.1~999.9%
Refer to Item 6-2 (1) for proportional band.
Select “OFF” to perform ON/OFF action.

Action hysteresis set screen (screen No.3)

Initial value: 3 or 0.3
Setting range: 1~999 unit
Set ON/OFF hysteresis on ON/OFF action.
This screen appears only when P=OFF.

Integral time set screen (screen No.4)

Initial value: 120 seconds
Setting range: OFF, 1~6000 seconds
Refer to Item 6-2 (2) for integral time.
Not shown on ON/OFF action. Selection of OFF starts P or PD action.

Derivative time set screen (screen No.5)

Initial value: 30 seconds
Setting range: OFF, 1~3600 seconds
Refer to Item 6-2 (3) for derivative time.
Not shown on ON/OFF action.
Selection of OFF starts P or PI action.

Manual reset value setting screen (screen No.6)

No.6 Initial value: 0.0%
Setting range: -50.0~-50.0%
Offset is adjusted when I=OFF (P or PD action) is selected.
For details of manual resetting, refer to Item 4-6 (3).
This screen appears only when 1=OFF has been selected.

Set value function set screen (screen No.7)

Initial value: 0.40
Setting range: OFF, 0.01~1.00
Used for suppressing overshooting and undershooting in expert PID.
For SF=1.00, minimize overshooting, for SF=OFF, expert PID is unable
to be normal PID action. This screen does not appear when P=OFF or
I=OFF.

PV bias value set screen (screen No.8)

Initial value: 0 or 0.0
Setting range: -200~200 unit
Used for sensor input error compensation.
Controlling is performed with corrected value for bias setting.

PV filter time set screen (screen No.9)

Initial value: 0 second
Setting range: 0~100 seconds
Used for the case of large input change and noise overlapping to reduce
the effect.

Key lock mode set screen (screen No.10)

Initial value: OFF
Setting range: OFF, 1, 2, 3
No data change is effective on the display screen locked.
Nevertheless, the direct call screen and the keylock mode setting screen
are not locked by setting any lock No.

Control output screen

Initial value for manual operation:
The value immediately before switched to manual
Setting range for manual operation: 0~100%
The measured value (PV) is displayed on the top and the control output
value on the bottom. Pressing the MAN key on this screen switches
auto to manual and vice versa. Refer to Item 4-6 (1) for detail.

Control execution/stop selecting screen

Initial value: EXEC
Setting range: EXEC, STBY
Execution ( ) or stop ( ) of control is selected.
Refer to Item 4-6 (2) for detail.

AT (auto tuning) action control screen

Initial value: OFF
Setting range: OFF, ON
For “ON” selection, AT is executed and for “OFF” selection, AT is
cancelled.
Refer to Item 5-2 for detail. This screen appears only during ON/OFF
operation; it does not appear when control is suspended or during
manual output.

Higher limit alarm set screen

Initial value: Absolute value alarm:

higher limit for the measuring range
Deviation alarm: 2000 unit

Setting range: Absolute value alarm: within measuring range

Deviation alarm: 0~2000 unit
Displays except the case with alarm option and the alarm type of the
function selecting screen of mode 2 screen group is not specified.
Refer to Item 5-3 (1) for detail.

Lower limit alarm set screen

Initial value: Absolute value alarm:

lower limit for the measuring range

Deviation alarm: -1999 unit
Setting range: Absolute value alarm: within measuring range

Deviation alarm: -1999~0 unit
Displays in case with alarm option and the alarm type of the function
selecting screen of mode 2 screen group is higher limit and lower limit.
Refer to Item 5-3 (2) for detail.

Heater break alarm value set screen

Initial value: OFF
Setting range: OFF, 0, 1~50.0A or OFF, 1~500A
Displays in the case with heater break alarm option and alarm type of the
mode 2 screen is higher limit+heater break.
Refer to Item 5-3 (3) for detail.

STBY, MAN,
For ON/OFF

No option

Upper row displays load current detected by CT.
(If the output is OFF, it shows )

1-0

1-1

1-2

1-3

1-4

1-5

1-6

1-7

1-8

1-9

1-10

MODE 1 Screen Group

P ≠ OFF

P=OFF

I=OFF

I ≠ OFF

Lock Nos. and Ranges to be locked are as follows:

Lock No. Range of Screens to Be Locked

OFF

1

2
3

Release of lock
Other screens than basic, control output,

AT action control and communication mode screens
All except basic screen
All screens

NOTE: The heater break alarm can be added if the instrument has alarm option and the

control output is the contact type or the SSR drive voltage type.

Heater (load) wire

To CT input terminal of
controller (no polarity)

Heater break alarm

• Set the alarm level at approx. 85% of the normal load current. In case of large current
variation, set larger value.
If multiple heaters are connected in parallel, set a larger value to output alarm for single heater
break.

• If “ ” is selected, no alarm output is obtained. Selecting “ ” during alarm output,
the alarm output is canceled.

• For case when heater break function is not applicable to direct current load, phase controlling
current and three phase heater.

• Connecting current transformer (CT)
One of the load line wires passes through the hole of the custom CT.

Wire from the secondary side terminal of CT to the CT input terminal of the instrument.

NOTE: Two types of the heater break
CT of 30A and 50A are available, the
type selected upon ordering is shipped
with the product as an accessory. Note
the maximum current to be set is 50.0A
for both types. CT is not provided when
0~500A is designated.

key
3 seconds

- 7 -

Proportional cycle setting screen (screen No.11)

Initial value: Contact output 30 seconds

SSR drive voltage 3 seconds
Setting range: 1~120 seconds
Time of proportional setting cycle is set.
The screen does not display voltage or current output.
Refer to Item 4-6 (4).

Soft start time setting screen (screen No.14)

Initial value: OFF
Setting range: OFF, 1~100%
Time for soft start, during which output is changed gradually, is set.
Refer to Item 4-6 (6).

Lower limit output limiter setting screen (screen No.12)

Initial value: 0%
Setting range: 0~99%
A lower limit value of control output is set.
Refer to Item 4-6 (5) for output limiter.

Communication mode selecting screen (screen No.15)

Initial value: Locl (local)
Setting range: Locl, Remt
Communication is allowed in the mode displayed on the bottom.

Communication address setting screen (screen No.16)

Initial value: 0
Setting range: 0~99
In case a plurality of apparatus are connected for communication, the
machine No. is set in a range from 0 to 99.

Communication rate selecting screen (screen No.18)

Initial value: 1200 bps
Selectable range: 1200, 2400, 4800 and 9600 bps
A rate for data transmission to the host is selected.

Delay setting screen Screen No.19
Initial value: 80
Setting range: 0~255
Delay time for starting communication from receiving communication
command is set.
Delay time = 0.1 × set value msec.
The screen is displayed for RS-485.

Communication data format selection screen (screen No.17)

Initial: 7b_E
Setting range: 7b_E, 8b_n
Select data format of communication from 7b_E (data bit length : 7bits,
parity: even, stop bit : 1)or 8b_n (data bit length: 8bits, parity: none,
stop bit : 1)

Higher limit output limiter setting screen (screen No.13)

Initial value: 100%
Setting range: 1~100%
A higher limit value of control output is set.

Mode 2 Screen Group (Function selecting screen)

NOTE: Screen flame on Item 4-4 is as follows:

Screens always shown
during key operation.

Screens shown or skipped depending on the type of
output or the setting status of control action mode.

Screens shown during case with
option or selected option.

1-11

1-12

1-13

1-14

1-15

1-16

1-17

1-18

1-19

Note: For details of communication, refer to the instructions on

communication in Item 8.

V and I
output

No
communi­cation

RS-422A

2-0

=
=

2-1

Use key to move select digit and data
registration, the selectable digit is indicated by
flashing point.

ENT

NOTE: If it is on auto tuning execution or key lock is set on lock No.1,

2 or 3, no selection can be performed even if the digit point is
flashing.

Digits and are not shown in case of no option. Digits of ,
and are not displayed.

• : Measuring range code select digit

Initial value: Multi 05, Voltage (V) 81, Current 95 fixed.
Selecting two digits from “4-5. Measuring range code table”.

: Control output characteristic select digit

Initial value:

: RA (heating characteristics)
: DA (cooling characteristics)

Refer to Item 6-3.
: Alarm type select digit

Initial value:
Select from “4-2. Alarm type code table”.

: Heater break alarm action mode select digit
Initial value:
Select from
: Lock mode and : REAL mode.

Refer to Item 5-3 (3).

Input scaling screen

Initial value:
Lower limit value (top row) 0.0
Higher limit value (bottom row) 100.0
Position of decimal point 0.0
Setting range:
Lower limit value -1999~9899 units
Higher limit value -1899~9999 units
Span = Higher limit value - Lower limit value
= 100~5000 counts
Position of decimal point:
No decimal point, 0.0, 0.00 and 0.000

Scaling is done for linear input (mV, V or mA).
The screen is only for monitoring and no setting is possible in the case
of sensor input.
Refer to Item 4-3 (6) for details.

1

2

3

4

5

5

6

3

6

7

1

2

4

5

7

7

8

8

4-5.Measuring range code table

Input type

Code Code

Measuring

Range

Measuring

Range

*1

*2
*2

B
R
S

K

K

Pt 100

JPt 100

E
J
T
N
U
L

01

12
13
14
15
16
17
18
19
20
21
22

02
03
04
05
06
07
08
09
10
11
31
32
33
34
35
36
37
38

39
40
41
42
43
44
45

46
71
72
73
81
82
83

95

~

~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~

~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~

~
~
~
~
~

~

0

10

0

10
50

100

20

0
0
0

1
5

10

4

V

mA

1800°C
1700°C
1700°C

400°C

1200°C

700°C
600°C

200.0°C
1300°C

200.0°C

600°C
600°C

100.0°C

50.0°C

200.0°C

600°C

100.0°C

50.0°C

200.0°C

0
0
0

-100
0
0
0

-199.9
0

-199.9
0

-200

-100.0

-50.0

0.0

-200

-100.0

-50.0

0.0

3300°F
3100°F
3100°F

750°F
2200°F
1300°F
1100°F

400°F
2300°F

400°F
1100°F

-1100°F

200.0°F

120.0°F
400°F

-1100°F

200.0°F

120.0°F
400°F

0
0
0

-150
0
0
0

-300
0

-300
0

-300

-150.0

-50.0
0

-300

-150.0

-50.0
0

Thermocouple
B, R, S, K, E, J, T, N: JIS/ANSI/IEC
R. T. D.

Pt100 : Present JIS/IEC
JPt100 : Former JIS

*1 Thermocouple B: Accuracy not

guaranteed for temperatures
below 400 °C (750 °F).

*2 Thermocouple U, L: DIN43710

Multi input

Thermocouple inputR. T. D.

Voltage

Current

Voltage

mV

Initial value: 0.0~100.0
Conditions of scaling
Scaling setting range:

-1999~9999,
Span: 100~5000 counts
Position of decimal point:
No decimal point, the
first, second and third
decimal places

In case measuring range is modified, set values, alarm action point and other
related values are all intialized.
NOTE: In case types of Alarms are changed, values are initialized.

- 8 -

4-6.Supplementary explanation of screens

(1) 0-1 Control Output Screen

• During manual control an output value is set on this
screen. In automatic control, it is only for monitoring.

• For switching automatic control to manual, press the
key on the control output screen.

• The MAN monitor LED flashes during manual control and
goes out when control is changed to auto.

• This screen is only for monitoring in the stop mode, when
AT is ON, or keylock is set at 2 or 3.

• Manual control output is released if the stop mode is
selected or the type of input or the measuring range is
changed during manual control.

• For changing the manual output value, the and
keys are used. It is not necessary to press the key.

• During manual control, the setting range of control output
is between 0 and 100%. In case an output limiter has been
set, that value serves as the higher/lower limit of the
setting range.

• In ON/OFF action (P=0), manual control output should be
at 0% or 100% (For V and I output, lower limit output
limiter or higher limit output limiter).

• When auto is changed to manual, the action becomes
balanceless and bumpless. If the measured value (PV) is
out of the proportional band, it does not attain balanceless
and bumpless action.

• If power is turned off during manual control output and is
turned on again, the condition is stored in the memory.

(2) 0-2 Control Execution/Stop Screen

• Use the and keys to select control execution
(EXEC) or stop (STBY). Then register it by means of the

key.

• Upon selecting stop, the STBY monitor LED turns on and
the control output display turns to 0%.

• Upon selecting execution, the mode changes to automatic
control; it is not possible to go directly from the stop to the
manual mode. When control is being executed, the STBY
monitor LED remains unlit.

• Even at stop, the alarm works.

• When AT is ON or 1, 2 or 3 of keylock has been selected,
no change is allowed.

(3) 1-6 Manual Reset Value Setting Screen

• In the PID operation, an offset is corrected automatically
by I, i.e., integral calculation. When I is set at OFF, this
correction is not made and output is manually increased or
decreased for correction. This is called manual reset (MR).

(4) 1-11 Proportional Cycle Setting Screen

• In the case of contact output or SSR drive voltage output,
time in which output is ON + time in which it is OFF in
the proportional band, that is, proportional cycle time is
set.

(5) 1-12, 1-13 Lower Limit and Higher Limit Output Limiters

Setting Screens

• The output limiters function effectively to maintain the
lowest temperature, to suppress control overshoot by
limiting control output to minimum and maximum values
set.

• In the output limiters, priority is given to the lower limit
value. Therefore, when the lower limit is set at a value
higher than the higher limit value, the higher limit value is
forced to be the lower limit value + 1%. Therefore, the
higher limit value cannot be set to be less than the lower
limit value + 1%.

ENT

Note: Moving to another screen while maintaining the manual

mode is possible. In this case, it should be noted that
control output is made manually. The apparatus is in the
manual mode when the MAN monitor LED is flashing.

(6) 1-14 Soft Start Time Setting Screen

• Soft start is the function selected to raise control output
gradually in the beginning of control. It is effective in
preventing excessive current from flowing into a heater or
similar apparatus.

• Soft start functions in the following cases:

 Upon applying power in the auto mode
 When control stop (STBY) is changed to control

execution (EXEC)

 When scale-over is restored to the normal state (in auto

mode)
The above are on condition that soft start time and
proportional band are not set at OFF.

• In the following cases, the soft start function is released.

 Soft start time has elapsed without problem.
 Auto is changed to stop or manual mode during the

execution of soft start.

 Soft start time or proportional band is changed to OFF

during the execution of soft start.

 The measurement range code is changed during the

execution of soft start.

 Control output characteristic is changed during the

execution of soft start.

 Scale-over of a measured value occurs during the

execution of soft start.

 Control output falls to a level below the output value of

soft start during the execution of soft start.

• Auto tuning is unable to be carried out during the
execution of soft start.

5. Operation

5-1.Setting of set value (SV)

(1) Press the or key to set set value. Keep pressing it to

flash the point of the least digit of set value and increase (or
decrease) value.

(2) After confirming the value to coincide the set value, press

to register the data.

(3) After registration of the data, the point of the least digit goes

off.
Example: Setting set value to 500 °C.

5-2.AT (Auto tuning)

(1) Execution of AT action

• By pressing the or key on AT action control
screen, display on lower row turns into and the
point of the least digit starts flashing, then the LED for AT
monitoring turns on to indicate AT standby. Press
key to start AT action with point going off and LED for
AT monitoring flashing.

• When AT is carried out, ON/OFF action of output is
repeated several times, with the set value as the border
line, to make PID values stored in the memory and
terminates. At the same time, control is started by using
stored PID constants.
The AT monitor LED goes out and the display on the AT
action control screen changes to

ENT

key

ENT

keykey

0-0 basic screen

continuing

point flashing point flashing

one by one

point goes off to
indicate registration

key

key

ENT

key

0-0 basic screen

point goes off to
indicate registration

0-1
AT action control screen

• LED for AT
monitoring
turns on

• LED for AT
monitoring starts
flashing

AT
action

Starting

point flashing

MAN

ENT

ENT

- 9 -

(2) Abort of AT

To abort the AT action, by showing the AT action control
screen, press the or key to select and press

key to abort AT and LED for AT monitoring also goes

off.

(3) AT unable for following conditions.

• When the control stop mode is on (The AT screen is not
displayed.)

• During manual output control (The AT screen is not
displayed.)

• The proportional band is setting (ON/OFF action).
(The AT screen is not displayed.)

• Lock No.2 or 3 is selected on the key lock set screen.

• PV (measured) value is over the scale.

• During the execution of soft start

(4) AT is automatically canceled in the following condition

during AT execution.

• Duration equal to or longer than 2 hours passed in the
output level of 0% or 100%.

• Power shutdown.

• PV (measured) value is over the scale during AT
execution.

(5) The items enable to be set are as follows:

• Level setting of the higher limit alarm.

• Level setting of the lower limit alarm or heater break
alarm.

• Screen number setting and key lock setting on the direct
call screen of mode 1 screen group.

(6) Relationship between AT and set value bias is as follows;

• When SB terminal is shorted before AT execution, AT
executes in the condition with SV+set value bias.

• When SB terminal is opened during AT execution
mentioned in the above, AT executes with SV+set value
bias condition, then controlled with SV condition after
completing AT execution.

• When SB terminal is opened, AT executes with SV
condition.

• When SB terminal is shorted during AT execution
mentioned in the above, AT executes with SV condition,
then controlled with SV+set value bias condition after
completing AT execution.

5-3.Setting of alarm

(1) Higher limit alarm setting

• The higher limit alarm set screen is shown in case where
alarm option is added and the higher limit alarm of the
alarm type select digit on the function selecting screen of
the mode 2 screen group is selected.

• Higher limit deviation value alarm is output for measured
value to be greater than set value + alarm set value.

• For higher limit deviation value alarm, if set value + alarm
set value exceeds the higher limit of the measuring range,
the action point is the higher limit of the measuring range.

• Higher limit absolute value alarm outputs alarm signal for
the measured value exceeds the alarm set value.

• With the or key, value at which the alarm signal
should be output is selected and registered with key.

Example 1:
In case of setting the alarm action point at 600 °C for higher
limit deviation value alarm. Set value is 500 °C.
As 500 °C + X °C + = 600 °C, X=600-500 = 100 °C should
be set.

Example 2:
In case of setting the alarm action point at 600 °C for higher
limit absolute value alarm.
The set point is action point.

(2) Lower limit alarm setting

• The lower limit alarm set screen is shown in case where
alarm option is added and the lower limit alarm of the
alarm type select digit on the function selecting screen of
the mode 2 group screen group is selected.

• Lower limit deviation value alarm is output for measured
value to be less than set value + (alarm set value).

• For lower limit deviation value alarm, if set value + (alarm
set value) is less than the lower limit of the measuring
range, the action point is lower limit of the measuring
range.

• Lower limit absolute value alarm outputs alarm signal for
the measured value is less than the alarm set value.

• With the or key, value at which the alarm signal
should be output is selected and registered with key.

(3) Heater break alarm setting

• The heater break alarm value setting screen is displayed
when the apparatus is equipped with the optional heater
break alarm function and heater break alarm is selected in
the alarm type selection digit of the function selecting
screen of the mode 2 screen group. The top row shows for
monitoring purposes the value of the presently flowing
current detected by CT and the bottom row shows the set
value of the alarm current.

• When OFF is set as the heater break alarm value, the
heater break alarm does not function.

• By setting OFF during heater break alarm signal output,
heater break alarm output is terminated.

• For set value other than OFF, heater break alarm signal is
output if the current that flows in case where control
output (contact or SSR drive voltage) is ON, is less than
set value.

• If LOCK mode is selected at heater break alarm action
mode select digit on the function selecting screen of the
mode 2 screen group and the break alarm signal is output,
alarm signal is only terminated by changing the break
alarm value into OFF or shutting down power.
If REAL mode is selected and heater current is less than
current value being set, break alarm signal is generated. If
heater current exceeds the current threshold (0.1A), output
of break alarm is terminated.

• Set the heater break alarm current value by means of the of
the or key and register it by using the key.

6. Supplement

6-1. Auto return function

In case there is no key operation for three minutes on each of the
screens except the control output screen and the heater break
alarm value setting screen, the basic screen of the mode 0 screen
group is displayed (auto return).

6-2.PID (Screen No.2, 4 and 5 of mode 1 screen group)

PID values are automatically set by performing auto tuning,
modification may be required for object to be controlled.
If auto tuning is not performed, PID value should be set.

Note: When the AT action is aborted, each value for PID is not

changed.

ENT

ENT

0-2 Higher limit deviation value alarm set screen

key key

ENT

key

0-2 Higher limit deviation value alarm set screen

key key

continuing

point flashing point flashing

one by one

ENT

key

point goes off to
indicate registration

ENT

ENT

continuing

point flashing point flashing

one by one

point goes off to
indicate registration

- 10 -

(1) P (proportional action)

Control output rate (%) is set for measuring range.
Control output value changes in proportion with measured
value (PV) and set value (SV).
For wide proportional band, change of control output is small
relative to deviation. The narrower the proportional band is,
the larger the output variation is and the more intense
proportional action is. Too narrow proportional band causes
ON-OFF like action with oscillation.

(2) I (integral time)

A function that compensates the offset created by
proportional action. Effect of compensation is weaker for
longer integral time and is intensified by shortening time.
Too short integral time causes integrating hunting and may
result in wavy operation.

(3) D (derivative time)

Improves stability of control by reducing overshooting of
integration from expected change of the control output.
Effect of compensation is weaker for shorter derivative time
and is intensified for longer time. Too long derivative time
may result in oscillating operation.

6-3.Control output characteristics (



digit of function

selecting screen of mode 2 screen group)

Control output characteristics determines the control output
direction according to the measured value (PV) relative to the set
value (SV).

(1) (RA characteristics)

Control output increases for lower measured value relative to
set value, it is used for heating on temperature control.

(2) (DA characteristics)

Control output decreases for lower measured value relative to
set value, it is used for cooling on temperature control.

6-4.Error message

(1) Defect of measuring input

In case of thermocouple break, R.T.D. A break
and PV being approx. 10% greater than higher
limit of measuring range.

In case of PV being approx. 10% less than the
lower limit of measuring range with inverted
polarity of input wiring.

Cold junction (CJ) defect to higher side for
thermocouple input.

Cold junction (CJ) defect to lower side for
thermocouple input.

Break of B or B and multiple break of A, B, B
upon R.T.D. input

(2) Defect of Heater Break Alarm CT Input

The CT input value exceeds 55A (550A for 0~5V
DC input).

The CT input value falls to -5A (-50A for 0~5V
DC input) or lower.

7. Instructions on Communication

7-1.General

Section 7 deals with communication interface, which is an
optional function, and communication procedure.

For the CN150 series, two types of communication
interface, RS-422A and RS-485 are available. Each enables a
personal computer or the like to set and read various data by the
use of signals which conform with EIA standards.

RS-422A and RS-485 are communication standards established
by the Electric Industries Association (EIA), which are meant for
electrical or mechanical matters, the so-called hardware, but not
for the software portion of the data transmission procedure.

Accordingly, communication even with an apparatus having the
same interface cannot be made unconditionally. It requires a
thorough understanding of specifications and procedures.

The use of RS-422A or RS-485 allows a plurality of apparatuses
to be connected in a parallel configuration. It is also possible to
use a line converter for conversion of RS-232C to/from RS-422A
and RS-232C to/from RS-485.

7-2. How to connect CN150 Series with host computer
7-2-1. Control signals

Since the apparatus is provided with input/output transmitting and
receiving data lines and an earthing line for signals but not with
any other signal line, control signals should be processed by the
host side.

The method of processing differs from system to system and
connection details should meet requirements of the host
computer. Examples of connection are shown in the following.

7-2-2. Connection of RS-422A

(1) The logical levels of input and output of this apparatus are

basically as follows:
Mark state **– <**+ (Example: SD- < SD+)
(including the state in which communication is not carried
out)
Space state **– >**+ (Example: SD- > SD+)

However, since the impedance of SD+ and SD- of this
apparatus is high until just before transmission, the above
levels are output just before commencing transmission.

(2) Example of Connection of RS-422A

Note: Message of heater break alarm is only displayed on

heater break alarm set screen.

is shown when output is OFF. It is not

defective.

Note: Contact to us or our representative in case of any defect

regarding this product.

Note: Some line converters between RS-232C and RS-422A

may have the following indication for terminal
(connector) output. If that is the case, logical levels
should be checked before connection.

Host computer
FG (Earthing for protection)

SD

+

SD

-

RD

+

RD

-

SG

Terminal resistance (510Ω)

Shielding wire

SR73A and 74A Controllers 1
terminal No.

2

+

SD
SD
RD
RD
SG

SD
SD
RD
RD
SG

Transmitted data

3

­4

+

Received data

5

-

Earthing for signal

1

SR73A and 74A Controllers 2
terminal No.

+

2

Transmitted data

-

3

+

4

Received data

-

5

Earthing for signal

1

- 11 -

Example: Mark state T × D+ > T × D-

Space state T × D+ < T × D-

7-2-3. Connection of RS-485

(1) The logical levels of input and output of this apparatus are

basically as follows:
Mark state -Terminal < +Terminal
(including the state in which communication is not carried
out)
Space state -Terminal > +Terminal

However, since the impedance of +terminal and -terminal of
this apparatus is high until just before transmission, the above
levels are output just before commencing transmission.

(2) Example of Connection of RS-485

7-2-4. Terminal resistance

As CN150 Series are not provided with terminal resistance,
connect a 510Ω resistance to only the last (the furthest from the
host) station.

7-2-5. Control of 3-state output

(1) Since RS-422A and RS-485 employ the multi-drop system,

in order to prevent signals from colliding, transmission
output should be controlled to maintain high impedance
while communication is not being made or signals are being
received.

(2) It should be controlled so that high impedance turns to the

normal state of output immediately before starting
transmission and high impedance is restored immediately
when transmission ends. Because 3-state control is delayed
by about 3 msec. maximum from the transmission of the end
bit of the end character, a delay time of about 4 msec. should
be provided in case transmission is started immediately.

7-3.Setting of communication parameters

There are four communication-related parameters to be set as
shown below. They are set by means of front keys except for
changing the communication mode from remote to local.

[ ] Communication mode
[ ] Communication address
[ ] Communication data format
[ ] Communication rate
[ ] Delay

7-3-1. Communication mode selecting screen ( )
(1) Local Mode ( )

The COM lamp on the front panel goes out to allow the
setting to be changed by the use of the front keys. In
communication, only the change from local to remote and the
read commands are valid.

(2) Remote Mode ( )

The COM lamp on the front panel turns on and the
commands for read and write through communication
become valid.
Front key operation works only to change from remote to
local.

7-3-2. Communication address ( ) setting screen

RS-422A and RS-485 allow connection of a plurality of
apparatuses but in fact, communication is carried out between two
apparatuses. Therefore, the address of each apparatus is
designated by a number between 00 and 99 so as to enable the
designated apparatus to respond.

7-3-3. Communication data format ( ) selecting screen

Select data format of communication from 7b_E (data bit length
: 7 bits, parity : even, stop bit : 1) or 8b_n (data bit length : 8bits,
parity : none, stop bit : 1)

7-3-4. Communication rate ( ) selecting screen

A rate of transmission from the controller to the host is selected
from among 1200, 2400, 4800 and 9600 bps.

7-3-5. Delay ( ) setting screen

In the case of RS-485, a minimum delay time for transmission
from receiving a communication command is set. Delay time is a
set value (0~255) × 0.1 msec. Nevertheless, actual delay time
includes time for processing the command added to the above
delay time.

7-4. Communication protocol 7-4-1. Communication procedure

Communication is carried out for each block and the
communication right alternates between the controller and the
host from block to block.

7-4-2. Explanation of block

(1) The data format in one block is shown below:

: Start character• • • • • @(40H) Shows the start of a

block.

T x D+
T x D­R x D+
R x D­SG

SD+
SD­RD+
RD­SG

2
3
4
5
1

Shielding wire

terminal No.

SR73A and 74A Controllers

Line converter
FG (Earthing for protection)

(+)

(-)

SG

(+)

(-)

SG

(+)

(-)

SG

2
3
1

2
3
1

Shielding wire

Host computer
FG (Earthing for protection)

terminal No.

CN150 Controllers 1

terminal No.

CN150 Controllers 2

Note: If terminal resistance is connected to two or more,

correct action is not guaranteed.

Terminal resistance (510Ω)

Host computer

Transmitting command block

(Reading)

Transmitting command block

(Reading)

Response

Response

Transmission

Transmission

Controller (CN150 Series)

(Reading)

Returning response block

(Reading)

Returning response block

@

1

position

position

2

Text

3 4

Lower

Higher

:CR

position

5

position

6

Lower

Higher

- 12 -

: Address (Machine No.)

• • • • • • • • • • • • • • • • • • • • • • • • • • • • • Two digits

Two-digit address data (00~99) set in the controller is
divided to the higher position (tens) and the lower
position (units) and each is shown by an ASCII code.

: Text

•••••••••••••••••••••••••••••••••••A group of a command and data,

in the format of each command.

: End character.

• • • • • • • • • (3AH) Shows the end of the

block.

: BCC check

• • • • • • • • • • • • BCC check data is shown in two

digits.
A value obtained by exclusive OR operation of data
following @(data in the higher position of the address)
through : is converted to two ASCII characters and
shown by two digits in the higher and lower positions.

(Example) BCC operation of DI read command (Address: 01)

: Terminator

• • • • • • • • • • • • CR(0DH) Shows the termination

of the data of the block.

(2) In this protocol, address data is inserted in the block in each

transmission or response and so no data link needs to be
established or aborted.

(3) The apparatus which has the address matches the one in the

command block, interprets the command, data, etc., and
returns a response block by inserting the same address into it.
Apparatuses which the addresses do not match the one in the
block wait for the next block without activating.

(4) In the case of receiving block data and the terminator CR is

not completed in about 1 second after receiving the start
character, it designates a time-out and automatically waits for
the next command, that is, the start character @ is being
waited for.

7-5.Text
7-5-1. Text format

The text format is classified into read data, write data and
response data.

(1) Read Data

@0 1D1 : BCC CR

(40H) (30H) (31H) (44H) (31H) (3AH) (34H)(45H) (0DH)

30H + 31H ++44H + 31H + 3AH=4EH

BCC=(34H), (45H)

4E

In the above, =EX-OR (exclusive OR)

•

••

(2) Write Data

(3) Response Data

Response data has different formats depending on whether
read data has been received or write data has been received.
 Response data to read data received

Appropriate read data contents of commands shown in
the table of the read data text format are sent back.

 Response data to write data received

The same data as the received write data is sent back.

7-5-2. Data format

The data format is divided to 3 categories; numerical data, 1 byte
data and special data.

(1) Numerical Data (-2999~9999)

The length of numerical data in the text is fixed to six
characters including a code and a decimal point. A code (+
or -) is attached to the head of the numerical data. In the case
where the numerical value including a code is less than six
characters, 0 is inserted between the code and the figure or
figures to make the value six characters. When a code is
excluded, each of the 5 characters is a figure or a decimal
point.

Examples of numerical data

*1

Command

The text format of read data contains only of a
command of two characters.

Command Contents of Read Data

PV value, Execution SV value*1, Control output value,
Stop (STBY) status, Manual (MAN) status, AH status,
AL/HB status, AT status, SB status.

Set value of higher limit alarm (AH), Set value of lower
limit alarm (AL).

Load current value, Set value of heater break alarm (HB).
Set value of set value bias (SB).

Set value of hysteresis (DF).
Set value of manual reset (MR).
Set value of PV bias, Set value of PV filter.
Set value of proportional cycle time.

Set value of soft start time.
Communication mode, Delay time.

Proportional band (P) value, Integral time (I), Derivative
time (D) value, Set value of target value function (SF).

Set value of lower limit output limiter, Set value of
higher limit output limiter.

D1

D2
D3

D4
D5
D6

D7
D8
D9

DA
DB

DC

The execution SV value is a total of the SV value and the
value bias.

Command

Command Write data

The text format of write data
contains a command and write data
value.

Contents of
Write Data

Attribute

Command

Contents of
Write Data

Attribute

SV valueE1

E2

E3

E4

E5

E6

E7

E8

E9

EA

EB

EC

ED

EE

EF

Numerical
value

Numerical
value

1 byte

*2

Control output value

Stop status

1 byte

Manual status

1 byte

AT status

Numerical
value

Higher limit alarm
(AH) value

F1

Numerical
value

PV bias value

F2

Numerical
value

PV filter value

F3

Numerical
value

Proportional cycle
time

F4

Numerical
value

Lower limit output
limiter value

F5

Numerical
value

Higher limit output
limiter value

F6

Numerical
value

Soft start time value

F7

1 byte

Communication
mode

Numerical
value

Lower limit alarm
(AL) value

Numerical
value

Heater break alarm
(HB) value

Numerical
value

Set value bias (SB)
value

Numerical
value

Proportional band
(P) value

Numerical
value

Integral time (I) value

Numerical
value

Derivative time (D)
value

Numerical
value

Target value function
(SF) value

Numerical
value

Hysteresis (DF) value

Numerical
value

Manual reset (MR)
value

*2 SV value is target set value.

Command Data 1 Data 2, Data n,,

Command Write data

Numerical data (30H~39H) or a decimal point (2EH)
Code + (2BH) or – (2DH)

Numerical value

+

-

1

0.01

1234

12.34

0 or OFF

+

+

+

+

+

00001

1 23456

0 0.01

01234

1 2.34

00000

-1

-0.01

-123.4

-12.34

-0.001

–

–

–

–

–

00001

1 23456

00.01

123.4

12.34

0.001

- 13 -

(2) One-Byte Data

One-byte data in the text has a fixed length of one character
which is either 0 or 1. Seven items are covered, namely, stop
status, manual status, AT status, AH status, AL/HB status
and communication mode.
 Stop (STBY), Manual (MAN), AT (ON), AH (ON),

AL/HB (ON), SB (ON), Communication (when the
remote mode is on).

 Execution (EXEC), Auto (AUTO), AT (OFF), AH

(OFF), AL/HB (OFF), SB (OFF), Communication
(when the local mode is on).

(3) Special Data

Special data is data sent in response to numerical data which
are outside of the ordinary range. Their patterns are shown
in the following.

 Numerical data is +10000~+10999.

 Numerical data exceeds the indicated range.

 Numerical data is over the scale.

 CT temperature exceeded the higher limit value or fell

below the lower limit value in the case of thermocouple
input.

 Wire breaking detected in the case of R.T.D. input

 CT input value exceeded the higher limit value or fell

below the lower limit value.

 Control output either turned on or turned off while CT

input measurement was ongoing.

 Data is undeterminable due to a set value of alarm code,

P=OFF, or some other reasons.

• Data in the case where the alarm code is 0 and D2

(AH, AL) or D3 (CT, HB) command has been
received.

• Data in the case where the alarm code is 1~4 and D3

(CT, HB) command has been received.

• AL data in the case where the alarm code is 5~8 and

D2 (AH, AL) command has been received.

• I, D, SF or MR data in the case where P=OFF and D5

(P, I, D, SF, MR) command has been received.

7-5-3. Communication error

When an error is found in the block after receiving data from the
host, an error message is sent back. The format of error messages
and the types of errors are described in the following.

 Error Message Format

 Error Types

7-5-4. Non-response process

When an error is found in the block upon receiving data
transmitted from the host, the next correct data block is waited for
without transmission of response data. Therefore, the host has to
retransmit the command block in any of the following cases:

 The start character was not @ (40H).
 The communication No. did not match.
 The end character was not CR (0DH).
 A hardware error such as a framing error, overrun or a

parity error occurred.

7-5-5. Restrictions by commands, etc.

(1) Restrictions by Read Command

Upon receiving the D1 read command, the status of
unequipped options (AH, AL/HB, SB) become 0 (30H).

(2) Restrictions by Write Command



In the case of P=OFF and Y and P output, write data of
E2 (write command of manual output value) is either of
the following two. Otherwise, ER09 is sent back.

In the case of P=OFF and V and I output, a lower limit
output limiter value or a higher limit output limiter
value is to be set.



If a write command is invalid due to the local mode, a set
value of keylock, AT or some other conditions, and that
command is received, ER11 should be sent back. The
following cases also require ER11 to be sent back.

1

0

10000

U

00000

10999

U

00999

more than
11000

DE

H 000

less than

-3000

DE

L000

The (+) side

H0

0000

The (-) side

L0

0000

CJ

H 000

CJ

L000

The higher
limit side

The lower
limit side

+0

0000

––

––––

The higher
limit side

The lower
limit side

HB

H 000

HB

L000

B0

0000

@

40H

Address No.

:

3AH

BCC

CR

0DH

Higher
position

Lower
position

Higher
position

Lower
position

E

45HR52H

Space

20H

Error No.

Error No.

Error Type

Description

05

06

08

09

11

12

BCC error

Command error

Data format error

Data error

Write mode error

Option error

Arithmetic value is not in accord with BCC.

Command other than prescribed one was received.

The format is different from prescribed one.

Command of unequipped option was received.

Write command was received when write command
was invalid.

Value is out of prescribed data range in the case of
write command.

ER09

0%

+

00000

100%

+

00100

ER11

Condition Received Write Command

Stop mode (STBY)

Auto mode (AUTO)
Manual mode (MAN)

E2 (Manual control output value)
E4 (Manual status)
E5 (AT status)
E2 (Manual control output value)
E5 (AT status)
E6 (Set value of AH)
E7 (Set value of AL)
E8 (Set value of HB)
E8 (Set value of HB)
E7 (Set value of AL)
EE (DF: Hysteresis)
E5 (AT status)
EB (I: Integral time)
EC (D: Derivative time)
ED (SF: Target value function)
EF (MR: Manual reset)
EF (MR: Manual reset)
ED (SF: Target value function)

Alarm code = 0

Alarm code = 1~4
Alarm code = 5~8
P=OFF

I=OFF
I=OFF

P=OFF

- 14 -

(3) Restrictions by Read/Write Commands Depending on

Equipped Optional Functions



When a command which becomes invalid because an
optional function is not equipped, ER12 should be sent
back. (Read commands are included.)

(4) Others

When P (proportional band)=OFF is prepared to be set, data
is as follows:

7-6.A list of transmitted/received data

The text portions of data in read commands and write commands
are listed below.

Block Data Format

7-6-1. Read command

(1) D1

(2) D2

(3) D3

(4) D4

(5) D5

(6) D6

(7) D7

(8) D8

(9) D9

(10) DA

(11) DB

(12) DC

7-6-2. Write command

In write commands, received data and transmitted data are
identical.

(1) E1

(2) E2

(3) E3

(4) E4

(5) E5

(6) E6

(7) E7

(8) E8

(9) E9

(10) EA

(11) EB

(12) EC

(13) ED

ER12

Condition Received Command

Without alarm option

Without HB option

D2 (AH/AL) read command
E6 (Set value of AH) write command
E7 (Set value of AL) write command
D3 (CT/HB) read command
E8 (Set value of HB) write command
D4 (Set value of SB) read command
E9 (Set value of SB) write command

Without SB option

OFF

+

000.0

or

–

000.0

@

40H

Address No.

Text Data

:

3AH

BCC

CR

0DH

Higher
position

Lower
position

Higher
position

Lower
position

Received
data

Transmitted
data

D1

D1

STBY

,,,,,,,,

MAN AH AL AT SB

0 (30H) or 1 (31H)

PV
value

SV
value

Output
value

Received
data

Transmitted
data

D2

D2

,

Set value of AH Set value of AL

Received
data

Transmitted
data

D3

D3

,

CT current value Set value of HB

Received
data

Transmitted
data

D4

D4

Set value of SB

Received
data

Transmitted
data

D5

D5

,,,

P value I value D value

SF value

Received
data

Transmitted
data

D8

D8

,

PV bias PV filter

Received
data

Transmitted
data

D6

D6

Hysteresis

Received
data

Transmitted
data

D7

D7

Set value of MR

Received
data

Transmitted
data

D9

D9

Proportional cycle
time

Received
data

Transmitted
data

DA

DA

,

Lower limit output
limiter value

Higher limit output
limiter value

Received
data

Transmitted
data

DB

DB

Soft start time

Received
data

Transmitted
data

DC

DC

,

C_MD

Delay time

E1

SV value

E2

Control output value (OUT)

E3

STBY

STBY : 1 (31H)
EXEC : 0 (30H)

E4

MAN

MAN : 1 (31H)
AUTO : 0 (30H)

E5

AT

AT-ON : 1 (31H)
AT-OFF : 0 (30H)

E6

Set value of AH

E7

Set value of AL

E8

Set value of HB

E9

Set value of SB

EA

P (proportional band) value

EB

I (integral time) value

EC

D (derivative time) value

ED

SF (target value function) value

- 15 -

(14) EE

(15) EF

(16) F1

(17) F2

(18) F3

(19) F4

(20) F5

(21) F6

(22) F7

8. Specifications

Display

• Digital display: Measured value (PV)/7-segment green
LED 4 digits
Set value (SV) /7-segment orange
LED 4 digits

• Parameter display: 7-segment LED for PV and SV

• Action display: Green LEDs for 5 points of output
(OUT), auto tuning (AT), operating
mode (STBY), remote (COM) and
manual output (MAN). Red LEDs for
2 points of alarm (AH, AL/HB).

• Display accuracy: ±(0.3% FS+1 digit) excluding cold
junction temperature compensation
accuracy in the case of the
thermocouple input.
±5% FS for temperatures below 400°C
(750 °F) of thermocouple B.

• Display accuracy range: 23±5 °C (18~28 °C)

• Display resolution: Depends on measuring range (0.001,

0.01, 0.1, 1)

• Measured display range: -10~110% (-210~680 °C for -200~
600 °C of R.T.D. input)

Setting

• Setting: By 5 front key switches

• Setting range: Same as measuring range.

Input

• Type of input : Multiple input of Thermocouple,
R.T.D., Voltage (mV), or Voltage (V),
or Current 4~20mA DC by code
selection

• Thermocouple: B, R, S, K, E, J, T, N, {U, L (DIN

43710)} Refer to Measuring range
code table.

External resistance: 100Ω max.
Input impedance: 500kΩ min.
Burnout: Standard feature (up scale)
Cold junction
temperature
compensation accuracy: ±2°C (°F) (5~45 °C)

±5 °C to the negative side of

measuring range in case of T and U
input, though.

• R.T.D: JIS Pt100 / JPt100 3-wire type
Amperage: Approx. 0.25mA
Lead wire tolerable
resistance: 5Ω max. / wire (The 3 lead wires

should have same resistance.)

• Voltage : 0~10, 10~50, 0~100mV DC or 0~1,

1~5, 0~10V DC

Input impedance: 500kΩ min.

• Current: 4~20mA DC
Receiving impedance: 250Ω

• Input scaling function: Scaling possible for voltage (mV, V)

or current (mA) input.
Scaling range: -1999~9999 counts.
Span: 100~5000 counts
Position of decimal
point: None, 0.0, 0.00, 0.000

• Sampling cycle: 0.5 sec.

• PV bias range: ± 200 unit

• PV filter: 0~100 sec. (0=without filter)

Control

• Control mode: Auto tuning PID/ ON-OFF control

• Proportional band (P): Off, 0.1~999.9% FS (Off setting: On­Off action)

• Integral time (I): Off, 1~6000 sec. (Off setting: P-PD
action)

•Derivative time (D): Off, 1~3600 sec. (Off setting: P-PI
action)

• Manual reset (MR): -50.0~50.0% (Valid when P ≠ OFF
and I=OFF)

• Output limiter: Lower limit limiter 0~99%, Higher
limit limiter 1~100% (Priority given to
lower limit limiter)

• Soft start of output: Off, 1~100 sec.

• ON/OFF hysteresis: 1~999 units

• Proportional cycle: 1~120 sec. (Factory-set value: 30 sec.
for contact output and 3 sec. for SSR
drive voltage output.)

• Control output

characteristics: RA / DA selectable (set to RA when

shipped)

• Set value function (SF) : Off (Off = 0.00) and 0.01~1.00

Control Output

• Contact output: 240V AC 2.5A / resistive load: 1.5A /
inductive load

• Current output : 4~20mA DC / load resistance: 600Ω
max.

• SSR drive voltage

output : 15±3V DC (with load resistance at

1.5kΩ) /load current: 20mA maximum

• Voltage output : 0~10V DC /
load current: 2mA maximum

Manual Control

• Output setting range: 0~100% (setting resolution: 1%) but
within range set by higher/lower
output limiters.

• Auto/manual switching: Balanceless bumpless. Within
proportional band range.

Communication (Optional)

• Signal level: EIA standards, conforming with RS­422A and RS-485.

• Communication system: RS-422A 4-wire half duplex multi­drop system. RS-485 2-wire half
duplex multi-drop (bus) system.

• Synchronous system: Start-stop synchronous system.

• Data format: Select data format of communication
from 7b_E (data bit length: 7bits,
parity: even, stop bit: 1) or 8b_n
(data bit length: 8bits, parity: none,
stop bit: 1)

EE

DF (hysteresis) value

EF

MR (manual reset) value

F1

PV bias value

F2

PV filter value

F3

Proportional cycle time

F4

Lower limit output limiter value

F5

Higher limit output limiter value

F6

Soft start time

E7

C_MD

C MD: Communication mode
Remote: 1 (31H)
Local: 0 (30H)

- 16 -

• Communication address:Machine numbers are set in a range
from 0 to 99.

• Communication rate: 1200, 2400, 4800 and 9600 bps.

• Communication delay: To be set in a range from 0 to 255
(Setting possible only in the case of
RS-485.)

• Communication

distance: RS-422A maximum 1200m

(depending on conditions)
RS-485 maximum 500m
(depending on conditions)

• Transmission procedure:No procedure.

• Communication code: Conforming with ASCII codes.

• Control signal: Not used.

• Error detection: Vertical parity (even parity) checking.
BCC (block check character)
checking.

• Connectable number

of apparatuses: Possible to connect 100 units

maximum (including the host,
depending on conditions)

Alarm Output (Optimal)

• Number of alarm points: 2 (AH and AL/HB, both for normal
open and common)

• Alarm Type: Selectable from the following 9
combinations.
(5 through 8 are selectable only when
apparatus has heater break alarm
function.)

0. Not assigned

1. Higher limit deviation value + lower limit deviation value
without inhibit action

2. Higher limit absolute value + lower limit absolute value
without inhibit action

3. Higher limit deviation value + lower limit deviation value
with inhibit action

4. Higher limit absolute value + lower limit absolute value with

inhibit action

5. Higher limit deviation value without inhibit action + heater
break

6. Higher limit absolute value without inhibit action + heater
break

7. Higher limit deviation value with inhibit action + heater
break

8. Higher limit absolute value with inhibit action + heater break

• Alarm setting range: Higher limit and lower limit absolute
value alarms: Within full scale of
measuring range

Deviation value: Higher limit: 0~2000 unit

Lower limit: -1999~0 unit

• Alarm action: On-Off action

•Alarm action hysteresis: Fixed to 0.2% of the measuring range

• Alarm output / rating: Contact 1a (common) / 240V AC 1.5A
(resistive load)

Heater Break Alarm (option)

This function can be added if the instrument has an alarm option
and the control output is the contact type or the SSR drive voltage
type.

• Alarm action: Heater amperage detected by
externally attached CT. (except 0~5V
DC input)
Alarm output On upon detection of
heater break while control output is
On.

• Current setting range: Off, 0.1~50.0A (Alarm action stops
when Off is set.) or, Off, 1~500A
(when 0~5 V DC for CT input is
selected)

• Setting resolution: 0.1A or 1A

• Amperage display: 0.0~55.0A or 0~550A

• Display accuracy: 5% FS (when sine wave is 50 Hz) or
1% FS (in case of 0~5 V DC input)

• Minimum time for

action confirmation: On time: 500 msec.

• Alarm holding: Selectable between Lock (holding)
and Real (no holding)

• Sampling cycle: 2 sec.

Set value Bias (option)

• Setting range: -1999~2000 unit

• Setting resolution: Same as display resolution

• Action input: Non-voltage contact (bias in action
when SB terminal is closed)

Others

•Data storage: By non-volatile memory (EEPROM)

• Isolation: Input, control output, communication
and alarm output circuits are isolated
from each other.
Input, set value bias and CT input
circuits are not isolated from each
other.

• Ambient conditions for use

Temperature/humidity
ranges: -10~50 °C and below 90%RH (on the

condition that there is no dew
condensation)

Height: 2000 m above sea level or lower
Installation category: II
Degree of pollution: 2

• Supply voltage/

frequency: 100-260V AC±10% (50 / 60 Hz)

• Power consumption: 12 VA max.

• Insulation resistance: Between input / output terminal and
power supply terminal:
500V DC 20 MΩ minimum
Between input / output terminal and
protective conductor terminal:
500V DC 20 MΩ minimum

• Dielectric strength: 1 min. at 2300V AC between input /
output terminal and power supply
terminal
1 min. at 1500V AC between power
supply terminal and protective
conductor terminal

• Protective structure: Only front panel has simple dust-proof
and drip-proof structure

• Material : PPO resin molding (equivalent to
UL94V-1)

• External dimensions

CN154, CN155:: H96 × W96 × D110

(panel depth: 100)mm

CN158, CN159:: H96 × W48 × D110

(panel depth: 100)mm

• Mounting: Push-in panel (one-touch mount)

• Panel thickness: 1.0~3.5 mm

• Panel cutout

CN154, CN155:: H92 × W92mm
CN158, CN159 : H92 × W45mm

• Weight

CN154, CN155: Approx. 400 g
CN158, CN159: Approx. 300 g

The contents of this manual are subject to change without notice.