IM 77J04H31-01E 4th Edition
Oct. 15, 2019-00
7
12.2 Setting Key Lock
This section describes an example of locking keys so that parameter settings other than the
operation parameters cannot be changed. The procedure below begins with the condition in which
the Setup Parameter Screen 1 is displayed.
Press the SET/ENT key to display parameter "LOC."
Press the UP key to display "1" on the DATA display.
Press the SET/ENT key to accept this data.
The decimal point blinks during
data change.
Setup Parameter Screen 1
Press to display
"LOC."
Press to display
"1."
Press .
12.3 Setting Economical Mode Time
Setting economical mode time allows indications on the PV display to be extinguished if no keystroke
is made within the set time.
The MVHK’s power consumption in the OFF mode is approximately 0.5 W or 1 VA during normal
operations (non-alarm status). This section describes an example of setting the economical mode
time to “5 minutes” (factory-set value: 10 minutes ).
The procedure below begins with the condition in which the Setup Parameter Screen 2 is displayed.
Press the SET/ENT key to display parameter "ECO."
Press the DOWN key to display "5" on the DATA display.
Press the SET/ENT key to accept this data.
The decimal point blinks during
data change.
Setup Parameter Screen 2
Press to display
"ECO."
Press to display
"5."
Press .
CAUTION
The economical mode is temporarily released at the time of PV display color change
and the PV display lights up. After the set economical mode time elapsed from the time
of returning to normal operation, the economical mode operation begins again.
12.4 Setting Input Bias
This section describes an example of correcting an error by setting input bias if there is an error of
“-1” in the MVHK scaling value (displayed value) with respect to the measured value. The procedure
below begins with the condition in which the Setup Parameter Screen 2 is displayed.
Press the SET/ENT key to display parameter "BS."
Press the UP key to display "1" on the DATA display.
Press the SET/ENT key to accept this data.
The decimal point blinks during
data change.
Setup Parameter Screen 2
Press to display
"BS."
Press to display
"1."
Press .
12.5
Confirmation of relay contact specifications (FAIL output type only)
For the FAIL output type (type code 2), you can check the relay contact specifications of alarm output
1, alarm output 2, and FAIL output specified at the time of order. The setting cannot be changed
only by checking. This section describes the case of MVHK option specification code “/ F3”. The
procedure below begins with the condition in which the Setup Parameter Screen 2 is displayed.
Press to display
"RLY."
Press the SET/ENT key to display parameter "RLY."
Displays the status of relay contact specifications on the
DATA display.
From left, alarm output 1, alarm output 2, off, and FAIL
output.
Setup Parameter Screen 2
: NO (a-contact)
FAIL output: NO
Alarm output 2: NC
Alarm output 1: NO
: NC (b-contact)
13. MONITOR OUTPUT
13.1 Monitor Output (Analog)
Monitor output (analog) is added only when monitor output code “6” or “A” is specified at the time of
order.
13.1.1 Setting Monitor Output
In setting monitor output, the maximum monitor output value (RTH) and minimum monitor output
value (RTL) can be freely set within the range of the maximum input scaling value (SH) and minimum
input scaling value (SL) that have been set for the MVHK.
For example, when the MVHK range code No. (IN) is “97,” the measured input range (RL, RH) is
“4 to 20 mA DC,” the input scaling values (displayed values) (SL, SH) are “-50 to 150” and monitor
output is “1 to 5 V DC,” setting the maximum monitor output value (RTH) to “125” and the minimum
monitor output value (RTL) to “-25” causes monitor output to be “1 V” when input to the MVHK is 6
mA (scaling value -25) as shown below.
0 mA
1 V
4 mA
(RL) 6 mA
18 mA
20 mA
5 V
20 mA
(RH)
-50
(SL)
-25
(RTL)
150
(SH)
125
(RTH)
Range code No. 97
Measured input range
Input scaling value
Input range of settings for
MVHK range code No. 97
Maximum measured input value:
20.00 mA
Minimum measured input value:
4.00 mA
Maximum input scaling value: 150
Minimum input scaling value: -50
Monitor output setting
Maximum monitor output value: 125
Minimum monitor output value: -25
Monitor output range
Fixed to 4 to 20 mA or 1 to 5 V DC
(5 V is output when the input scaling value is 125,
while 1 V is output when it is -25.)
13.1.2 Setting Ranges and Factory-Set Values of Monitor Output (Analog)-Related
Parameters
Setup Parameter Screen 2
Parameter
Symbol
Parameter Name
Setting Range
Factory-Set
Value
Maximum monitor output
value (RTH)
RTL + 1 digit to 9999
Within the instrument input range
SH
Minimum monitor output
value (RTL)
-1999 to RTH - 1 digit
Within the instrument input range
SL
Visibility of monitor
output adjustment screen
(MON)
OFF (invisible) or ON (visible)
Set this parameter to "ON" for adjustments of monitor
output.
OFF
(invisible)
Forced output of a
monitor output value
(MAN)
-25.0 to +125.0 (%)
Note that the assured range is -6.0 to +106 (%).
0.0
Monitor output zero
adjustment (ZER)
-19.99 to 20.00 (%)
0.00
Monitor output span
adjustment (SPN)
-19.99 to 20.00 (%)
0.00
13.1.3 Setting Monitor Output
CAUTION
Accuracy (±0.1% of output span) is limited depending on the settings for input scaling
and maximum and minimum monitor output values. For more information on accuracy
limitations, refer to the general specifications (GS 77J04H31-01E).
This subsection describes an example of setting the maximum monitor output value (RTH) to “125”
and minimum monitor output value (RTL) to “-25” when the MVHK input scaling values (displayed
values) (SL, SH) are “-50 to 150.”
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 SET/ENT key to display parameter "RTH."
In this case, the DATA display shows the set maximum
input scaling value "150."
Press the DOWN key to display "125" on the DATA display.
Press the SET/ENT key to accept this data.
Press the SET/ENT key to display the next parameter.
Press this key for
more than 3 sec.
The decimal point blinks during
data change.
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 the Setup Parameter
Screen 2.
Press the SET/ENT key to display parameter "RTL."
In this case, the DATA display shows the set minimum
input scaling value "-50."
Press the UP key to display "-25" on the DATA display.
Press the SET/ENT key to accept this data.
The decimal point blinks during
data change.
Setup Parameter Screen 1
Setup Parameter Screen 2
Operation Parameter Screen
Power ON
This completes the procedure
for setting the maximum
monitor output value.
This completes the procedure
for setting the minimum monitor
output value.
Press to display
"LOC."
Press to display
"-1."
Press .
Press to display
"RTL."
Press to display
"-25."
Press .
Press to display
"RTH."
Press to display
"125."
Press .
Press .
13.1.4 Adjusting Monitor Output
(1) Instruments for adjustment
•
Digital multimeter (DMM) (YOKOGAWA DM7560 or the equivalent): 1
•
Precision resistor of 250 Ω ± 0.01%, 0.25 W or more: 1
(2) Output adjustments
Connect each instrument as shown below.
10 11
1 2
3
9
8 7
6 5
4
7
8
N–
L+
(SUPPLY)
Power supply
R: 250 Ω precision resistor for current
output
R
DMM
Main unit
Socket
–
+
1
1
3
3
Monitor output
(3) Adjusting monitor output
The following describes an example of adjusting an error when the minimum monitor output value
(measured value) is 1.008 V (an error of 0.008 V) with the MVHK monitor output set to “1 to 5 V
DC.” The basic adjusting procedure for the maximum monitor output value is the same as that of
the minimum monitor output value; perform it by referring to the procedure below.
The procedure below begins with the condition in which the Setup Parameter Screen 2 is
displayed.
