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- 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

 

OFF

P=OFF

I=OFF

 

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

Summary of Contents for SR73A Series

Page 1: ...o the instrument On the terminal nameplate affixed to the case of your instrument the mark is printed This is to warn you of the risk of electrical shock which may result if the charger is touched while it is energized A means to allow the power to be turned off such as a switch or a breaker should be installed in the external power circuit to be connected to the power terminal of the instrument F...

Page 2: ... 14 8 Specifications 15 4 1 Introduction 1 1 Check before use This product has been fully checked for quality assurance prior to shipment Nevertheless you are requested to make sure that there is no error damage or shortage of delivered items by confirming the model codes and checking the external view of the product and the number of accessories Confirmation of Model Codes Check the model codes s...

Page 3: ...th 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 ...

Page 4: ...nitor 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 Tu...

Page 5: ... 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 ...

Page 6: ...ualoperation 0 100 Themeasuredvalue PV isdisplayedonthetopandthecontroloutput valueonthebottom PressingtheMANkeyonthisscreenswitches autotomanualandviceversa RefertoItem4 6 1 fordetail Control execution stop selecting screen Initialvalue EXEC Settingrange EXEC STBY Execution orstop ofcontrolisselected RefertoItem4 6 2 fordetail AT auto tuning action control screen Initialvalue OFF Settingrange OFF...

Page 7: ...ockissetonlockNo 1 2or3 noselectioncanbeperformedevenifthedigitpointis flashing Digits and arenotshownincaseofnooption Digitsof and arenotdisplayed Measuring range code select digit Initialvalue Multi05 Voltage V 81 Current95fixed Selectingtwodigitsfrom 4 5 Measuringrangecodetable Control output characteristic select digit Initialvalue RA heatingcharacteristics DA coolingcharacteristics RefertoIte...

Page 8: ...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 ENT 6 1 14 Soft Start Time S...

Page 9: ...m 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 low...

Page 10: ...nd 74A 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 f...

Page 11: ...ront 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...

Page 12: ... 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...

Page 13: ...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 ou...

Page 14: ...xt 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 Trans...

Page 15: ... 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 On Off 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...

Page 16: ...tact 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 ac...

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