Step 2 step 3 step 1 – Yokogawa JUXTA M Series Digital Limit Alarms MVHK User Manual

Page 3

IM 77J04H31-01E 3rd Edition : 2006.08.31-00

6. PARAMETER SETTING ORDER AND PRECAUTIONS

When setting a parameter, begin with Step 1 below and continue in sequence.

Range code No.

(IN)

Max./min. input scaling values

(RH)

(RL)

You can enter either parameter first.

You can begin with any of these parameters.

Alarm-1 action Alarm-2 action Alarm-3 action Alarm-4 action

(AL1)

(AL2)

(AL3)

(AL4)

After that, you may
proceed with
settings beginning
at any parameter.

Step 2

Step 3

Step 1

NOTE

If the settings for the range code No. (IN), maximum and minimum input scaling values
(SH)/(SL) or alarm actions (AL1 to AL4) are changed, the relevant parameter setpoints
shown in the table below will be initialized.
To change a parameter setpoint, begin with Step 1 above and continue in sequence.

Parameters to be initialized if the range code No. (IN) is changed

Max. and min. measured input values (RH, RL), decimal point position of scaling value (SDP), max. and

min. input scaling values (SH, SL)

Alarm setpoints (A1 to A4), hysteresis (HY1 to HY4), setpoint (SP)

Max. and min. monitor output values (RTH, RTL)

Input adjustment point LOW (BL) and HIGH (BH), input adjustment LOW (AL) and HIGH (AH)

High and low limits for PV display color change (PCH, PCL)

Parameters to be initialized if the maximum or minimum input scaling value (SH) or (SL) is changed

Alarm setpoints (A1 to A4), hysteresis (HY1 to HY4), setpoint (SP)

Max. and min. monitor output values (RTH, RTL)

Input adjustment point LOW (BL) and HIGH (BH), input adjustment LOW (AL) and HIGH (AH)

High and low limits for PV display color change (PCH, PCL)

Parameters to be initialized if the type of alarm action (AL1 to AL4) is changed

The alarm setpoint (A1 to A4) corresponding to each alarm action (AL1 to AL4)

(Example: If AL1 is changed, A1 will be initialized.)

Parameters to be initialized if the type of PV display color mode (PCM) is changed

High and low limits for PV display color change (PCH, PCL)

7. SETTING INPUT-RELATED PARAMETERS

7.1

Input Scaling

The MVHK allows you to set any input scaling value (displayed value) with respect to the
measured input range.
For example, if the MVHK measured input range is 4 to 20 mA DC, setting the input
scaling range (displayed value) to -50 to 150 causes the MVHK to display “0” in the PV
display at 8 mA input (equivalent to 25% of 4 to 20 mA input) as shown in the figure below.

0 mA

4 mA

(RL)

8 mA

20 mA

20 mA
(RH)

-50

(SL)

150
(SH)

Range code No. 97

Measured input range

Input scaling value

Input range when the MVHK
range code No. is 97

Maximum value of measured
input range: 20.00 mA
Minimum value of measured
input range: 4.00 mA

Maximum input scaling
value: 150
Minimum input scaling
value: -50

At 8 mA input, "0" is displayed on
the PV display.

7.2

Setting Ranges and Factory-Set Values of Input-Related Parameters

Setup Parameter Screen 2

Maximum measured
input value (RH)

Minimum measured
input value (RL)

Decimal point position
of scaling value (SDP)

Maximum input
scaling value (SH)

Minimum input
scaling value (SL)

RL + 1 digit to the max. value of instrument input
range

RL to RH - 1 digit

0 (no decimal place), 1 (one decimal place),
2 (two decimal places), 3 (three decimal places)

SL + 1 digit to 9999

*The setting range depends on the setting of the decimal point position (SDP).

-1999 to SH - 1 digit

*The setting range depends on the setting of the decimal point position (SDP).

Parameter Name

Setting Range

Factory-Set

Value

Parameter

Symbol

5.00

-5.00

100.0

0.0

Range code No.
(IN)

*1 The factory-set values for the input signal code "6" are as follows:

Range code No.: 92; maximum measured input value: 5.00; and minimum measured input value: 1.00
The factory-set values for the input signal code "A" are as follows:
Range code No.: 97; maximum measured input value: 20.00; and minimum measured input value: 4.00

Instrument input range

Range code No.

-10.00 to

+10.00 V

-5.00 to +5.00

V DC

-1.000 to +1.000 V DC

0.00 to 50.00 mA DC

0.00 to 10.00 mA DC

0.00 to 20.00 mA DC

0.000 to

4.000 mA DC

H range

M range

L range

M range

L range

M range

L range

7.3

Setting Input-Related Parameters

This section describes an example of setting the range code No. (IN) to “97,” measured
input range (RL, RH) to “4 to 20 mA DC,” the decimal point position of input scaling value
(SDP) to “0” (with no decimal place) and input scaling values (SL, SH) to “-50 to 150.”

NOTE

Note that setting the range code No. (IN) to a value other than those specified in Section
7.2 is invalid.

Press

When you press the SET/ENT key for more than 3 sec. with the
Operation Parameter Screen displayed, the Setup Parameter
Screen 1 appears.

When the power is turned on, the PV screen of the Operation
Parameter Screen appears.

Press the UP or DOWN key to display "97" on the DATA display.

Press the SET/ENT key to accept range code No. "97."

Press the SET/ENT key again to display parameter "RH."

Press the SET/ENT key to accept the data as is, because the
initial value for the range code No. 97 is "20.00." (The next
parameter "RL" appears because no data has been changed.)

Press the UP key to display "4.00" on the DATA display.

Press the SET/ENT key to accept this data.

Press the SET/ENT key again to display parameter "SDP."

Press the DOWN key to display "0" on the DATA display.

Press the SET/ENT key to accept this data.

Press the SET/ENT key again to display parameter "SH."

Press the UP key to display "150" on the DATA display.

Press the SET/ENT key to accept this data.

Press the SET/ENT key again to display parameter "SL."

Press the DOWN key to display "-50" on the DATA display.

Press this key for
more than 3 sec.

Press

This completes the process for
setting the max. measured input
value.

This completes the process for
setting the minimum measured
input value.

This completes the process for
setting the decimal point
position.

This completes the process for
setting the maximum input
scaling value.

This completes the process for
setting the minimum input
scaling value.

This completes the process for
setting the range code No.

Press

to display "4.0."

Press

to display "0."

The decimal point blinks during
data change.

Press the SET/ENT key to display parameter "LOC."

Press the DOWN key to display "-1" on the DATA display.

Press the SET/ENT key to display parameter "IN" in the Setup

Parameter Screen 2.

Setup Parameter Screen 1

Setup Parameter Screen 2

Operation Parameter Screen

To the Operation Parameter Screen

Power ON

Step 1

Setting the range code

Setting the max. and min. measured input values

Setting the max. and min. input scaling values

Setting the decimal point position

Step 2

The decimal point blinks during
data change.

Press or

to display "97."

Press because the

data remains the same.

Press

to display "150."

Press

to display "-50."

Press

for more than

3 sec.

Press the SET/ENT key to accept this data.

Press the SET/ENT key for more than 3 sec.
This causes the Operation Parameter Screen to appear.

Press

to display "LOC."

Press to display "-1."