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Instruction Manual MODEL AM-756

 

16/20

 

Measurement

value

Comparative

set value

HH or HI

Comparative

set value

LO or LL

ON

ON

Comparative

output

HH or HI

Comparative

output

LO or LL

Hysteresis

Hysteresis

Time

 

 

Comparative Output 

Output OFF 

 ON Conditions 

HH 

Measurement value < (

HI 

Measurement value < (

GO 

One of HH, HI, LO, LL is ON (No Hysteresis) 

LO 

Measurement value > (

  + 

LL 

Measurement value > (

  + 

 

7-4-3 Comparative Output Deactivation Delay Function 

When the comparison results function is deactivated, this function will switch 
the  comparative output  deactivation delay  ON  for  the  set  time duration only, 
then switch OFF. 

Parameter Used: 

 

Delay Time (msec): RLD set value × 20msec 
 

7-4-4 Comparative Output Latch Function 

When comparative output reads any judgment other than GO, this status will 
be saved (latched). 

Parameter Used: 

 

To deactivate the latch function, please follow the following steps. 
(1)

 

Go to parameter setting mode. 

(2)

 

Turn the relay reset control terminal ON. 

 

7-4-5 Comparative Output Reset Function 

This function can be used to turn all comparative output results OFF using the 
relay reset control terminal. 
 

7-5 External Control Terminal Function 

7-5-1 External Control Terminal Specifications 

 
ON voltage: 0 to 0.8V 
OFF voltage: 4.5 to 5V 
Input current: 
Max. -3mA 
 
 
 
 

Please ensure that the supplied control terminal input is no-voltage contact 

input. 

When inputting with a transistor or similar device, please connect the device 

using open-collector output. 

As the contact current is low, please ensure a terminal for minute electric 

currents is used for contact input. 

 

7-5-2 Peak Hold Function 

(1)

 

Peak Hold 

This function can hold the maximum value (PH), minimum value (VH) or the 
difference between the maximum and minimum values (PVH) during 
measurement. Peak hold can be controlled with the external control terminal. 

Parameter Used: 

 

 
(2)

 

Operation Type 

There are two peak hold types; Type A (real display) and Type B (result 
display). 

Parameter Used: 

 

Type A: This operation type commences peak hold measurement when peak 

hold terminal is activated, and updates the peak hold value at each 
sampling rate. When peak hold terminal is deactivated, peak hold 
measurement ends and the device returns to routine measurement. 

Type B: This operation type updates peak hold values stored while peak hold 

terminal is OFF when peak hold terminal is activated, and saves the 
peak hold values until the next update. 

 

7-5-3 Start/Hold Function 

(1)

 

Start/Hold 

This function enables control over the commencement and ending of 
measurement using the external control terminal. 

(2)

 

Operation Type 

There are two Start/Hold operation types; Type A (free run) and Type B (one 
shot). 

Parameter Used: 

 

Type A: This operation type enters hold status when Start/Hold is ON, halting 

measurement. The comparative, analog and BCD outputs save the 
values recorded before HOLD was activated. 

Type B: This operation type executes one measurement only when Start/Hold 

switches from OFF to ON, updating the comparative, analog and 
BCD outputs. A HOLD status is maintained for everything else.   
Measurement values are only updated once, even if Start/Hold is 
switched on more than once during the sampling time. 

 
(3)

 

Start/Hold Response Time 

Max. ( (20msec × AVG set value)) 
 
(4)

 

Start Delay 

When the Start/Hold function is being used, it is possible to delay the 
commencement of measurement for a set period of time. 

Parameter Used: 

 

Start Delay Time (msec) = S/H.D set value × 20msec × AVG set value 
 

7-5-4 Pattern Select 

The external control terminal or front panel keys can be used to switch 
between the 8 comparative setting value patterns, hysteresis and scaling 
setting values. 
(1)

 

Pattern Select Method 

Pattern  select  may  be  executed  using  the  external  control  terminal,  the  front 
panel keys or through parameter settings. 

Parameter Used: 

 

 
(2)

 

Pattern Select: Using Front Panel Keys 

3 sec

Pattern 1

Measurement mode

Pattern 2

Pattern 3

Pattern 8

3 sec

3 sec

3 sec

3 sec

 

N.B.1) Even if pattern numbers are changed using the front panel keys, they 

will not be saved to the E

2

PROM. 

N.B.2)  The  front  panel  keys  may  not  be  used  for  the  pattern  select  function 

method during setting mode or maximum minimum value mode. 

 
(3)

 

Pattern Select: Using Parameter Change 

When  the  pattern  selection  method  is  set  to  “INT,”  the  set  values  can  be 
changed  using  the  parameter  pattern  numbers.  When  the  set  values  are 
changed,  the  pattern  number  is  saved  to  the  E

2

PROM  and  the  set  pattern  is 

activated at the next start-up. 

Parameter Used: 

 

 
(4)

 

Parameter Select: Using Control Terminal 

When the control terminal is used for pattern select, the patterns used can be 
switched by turning the pattern select control terminals ON and OFF. 

Selected Pattern No.  PSEL0 Terminal  PSEL1 Terminal  PSEL2 Terminal 

OFF 

OFF 

OFF 

ON 

OFF 

OFF 

OFF 

ON 

OFF 

ON 

ON 

OFF 

OFF 

OFF 

ON 

ON 

OFF 

ON 

OFF 

ON 

ON 

ON 

ON 

ON 

 

7-6 Display 

7-6-1 Main Display Update Cycle 

The main display update cycle can be changed. The display update cycle and 
sampling rate are not related. 

Parameter Used: 

 

 

7-6-2 Display Blank 

This  function  changes  the  display  brightness  and  extinguishes  the  main 
display. 
When  the  main  display  is  extinguished,  the  comparative  output  display  and 
function display will illuminate. 

Parameter Used: 

 

 

+5V

Control 
section

AM-756

Control 

terminal

COM

Input Current

Summary of Contents for AM-756

Page 1: ...s 1 Watanabe Electric Industry Co Ltd assumes no responsibility for any special damage indirect loss or passive loss caused by this device 2 This device has been developed designed and manufactured on...

Page 2: ...elow Min 120mm Min 70mm 0 6 0 45 92 0 0 8 2 2 External Dimensions 48 96 91 5 102 5 77 86 5 97 5 21 4 11 0 5 2 Mode Enter 88 5 2 3 Mounting the Unit on the Panel 1 After removing the mounting bands fro...

Page 3: ...No Name Details 1 NC Unconnected Please do not use these terminals as relay terminals 2 NC 3 NC 4 HI Terminal 5 LO Terminals connected internally 6 LO Input range settings cannot be made 3 3 3 DB Ran...

Page 4: ...nal 5 GO C GO Output photocoupler Collector terminal 6 GO E GO Output photocoupler Emitter terminal 7 LO C LO Output photocoupler Collector terminal 8 LO E LO Output photocoupler Emitter terminal 9 LL...

Page 5: ...ut Display Displays comparative judgment results Extinguished Comparative output OFF 2 Main Display Displays measurement values Displays group name parameters set values 3 Function Indicators RE Unuse...

Page 6: ...ode Enter Mode Enter Mode or Mode Enter Mode or Mode Mode Enter Mode or Mode Enter Mode or Mode Enter Mode or Mode Enter Mode Enter Mode or Mode Enter Mode or Mode Enter Mode Enter Mode or Mode Enter...

Page 7: ...Process value Input unit Comparative output unit Control terminals 5 7 Key repeat will occur when the or keys are held down 4 5 Changing Parameter Settings The diagram below shows the basic operating...

Page 8: ...thin the range or cancel the setting change Canceling Changes to Set Values Pressing the Enter key during the changing of a set value cancels the value change The set value will revert to the value pr...

Page 9: ...e 3 times Enter Enter 5 4 Comparative Output Settings 1 Set the Comparative Output HI Comparative Value to 60 00 As the setting condition is HH HI the value of HH cannot be lower than the value of HI...

Page 10: ...zero control method Option any apart from NO Digital Zero Value 199999 to 199999 digit 0 Sets the digital zero value when digital zero is ON N B If settings are made while digital zero is OFF they wi...

Page 11: ...o 199999 0 Sets the display value when input is offset display values to Offset Input Values 1 to 8 Changes according to input range See chart below See chart below Sets the input value for offset dis...

Page 12: ...t value LO output ON Decimal point position depends on the decimal point position in identical patterns to LL Comparison Set Values 1 to 8 100000 Measurement value LL set value LL output ON Decimal po...

Page 13: ...etting Condition N10i N09i N08i 8000 Input Value 9 Linearize pre correction display Output Value 9 Linearize post correction display LINE Set Value 16 Linearize Output Value 9 199999 to 199999 digit S...

Page 14: ...t Value Input Range Possible Display Range Resolution 11 0 2V Approx 0 21V 199999 12 2V Approx 2 1V 13 20V Approx 21V 14 200V Approx 210V 23 20mA Approx 21mA 24 200mA Approx 210mA 1V 5V Approx 5 25V 2...

Page 15: ...is activated when Tracking zero correction width Measurement value Tracking zero correction width Parameter Used 7 3 3 Step Wide Function This function changes the resolution of the least significant...

Page 16: ...ontrol terminal 2 Operation Type There are two Start Hold operation types Type A free run and Type B one shot Parameter Used Type A This operation type enters hold status when Start Hold is ON halting...

Page 17: ...h output are undefined at start up N B 2 Open collector output is NPN open collector output N B 3 When the computed result is WAIT the data output will be 000000 2 Over range Signal OVER Output is act...

Page 18: ...power External dimensions 96mm W 48mm H 97 5mm D without optional unit installed Weight Approx 200 to 300g Insulation withstands Voltage AC 500V per minute between input terminal and each of the outp...

Page 19: ...the main unit connector female 9 2 Trouble Shooting Problem Possible Cause Solution The monitor display is blank The display blank function is set to extinguish display Turn OFF the extinguish display...

Page 20: ...e Electric Industry Co Ltd Watanabe Electric Industry Co Ltd will make repairs free of charge 11 2 After sales Service This product was manufactured tested inspected and shipped under strict quality c...

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