Important, See also – Yokogawa JUXTA M Series Digital Limit Alarms MVRK User Manual

Page 7

IM 77J04R31-01E 1st Edition : 2006.08.31-00

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

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

Press the SET/ENT key to accept the data.

Press the SET/ENT key twice to display parameter "ZER."

Display parameter "MON" and press the DOWN key to
display "OFF" on the DATA display.

Press the SET/ENT key to accept the data.

Press the UP key to display "-0.20" on the DATA display.
Then press the UP or DOWN key to make fine
adjustments.

Make adjustments to the maximum monitor output value
by displaying parameter "SPN."

The minimum output value
(1 V) is output forcibly.

The maximum output
value (5 V) is output
forcibly.

(Displays a correction value
corresponding to the error.)

Press to display

"-0.20."

Press or

to make fine adjustments.

Setup Parameter Screen 2

This establishes the setting in which
the monitor output adjustment
screen becomes visible.

This establishes the setting in which
the monitor output adjustment
screen becomes invisible.

This completes the process for
adjusting the minimum monitor
output value.

The MVRK enters the operable status as soon as the power is turned on, but requires 10 to 15 minutes
of warm-up to meet the performance requirements.

(Measured value [1.008 V]) - (Reference value [1 V])

Output span [4 V]

100 (%)

Error =

Follow the same procedure as above to adjust the maximum monitor
output value.

After adjusting the monitor output, set the MON parameter to "OFF" (making the adjustment
screen invisible).

When this parameter (ZER) is displayed, the MVRK forcibly outputs

the minimum monitor output value (0%), regardless of input.

The monitor output is corrected by -0.2% because the error is
+0.008 V (+0.2%).

Press to display

"MON."

Press to display

"ON."

Press .

Press to display
"ZER."

Press to display

"OFF."

Press .

12.1.5

Using the Forced Output Function

The use of the forced output function allows you to conduct operation tests for a device
connected to the monitor output terminals of the MVRK.
This subsection describes an example of forcing a value equivalent to 50% of the output
range (3 V) to output when the monitor output of the MVRK is “1 to 5 V DC.”
The procedure below begins with the condition in which parameter “MAN” is displayed
with the MON parameter set to “ON” in the Setup Parameter Screen 2.

Press the UP key to display "50.0" on the DATA display.

The minimum output value
(1 V) is output forcibly.

The value equivalent to
50% of the output range
(3 V) is output forcibly.

Setup Parameter Screen 2

When this parameter (MAN) is displayed, the MVRK forces
the monitor output value to be output, regardless of input.

3 V is output forcibly. The MVRK continues to output
while this parameter is displayed on the screen.

After completion of the forced output, return the MON parameter setting to "OFF" (making the
adjustment screen invisible).

Pressing causes

the output value to increase.

IMPORTANT

After performing monitor output adjustments or forced output, always set the MON
parameter to “OFF” (making the adjustment screen invisible). If the Setup Parameter
Screen 2 is switched while the MON parameter is set to “ON,” displaying parameter
“MAN,” “ZER” or “SPN” causes a value corresponding to the set value to be output
forcibly. Furthermore, if the power is turned off while parameter “MAN” is displayed, the
set values will be initialized.

12.2 Monitor Output (Communication)

Monitor output (communication) is added only when the monitor output code “P” is
specified at the time of order.

12.2.1

Setting Ranges and Factory-Set Values of Monitor Output (Communica-
tion)-Related Parameters

Setup Parameter Screen 2

0: PC link

3: MODBUS ASCII

1: PC link with SUM

4: MODBUS RTU

2: Ladder communication

1.2 (0: 1200 bps)

4.8 (2: 4800 bps)

2.4 (1: 2400 bps)

9.6 (3: 9600 bps)

NON (0: None)

ODD (2: Odd)

EVN (1: Even)

1 to 99

1 or 2 (bits)

7 or 8 (bits)

Parameter Name

Setting Range

Factory-Set

Value

Parameter

Symbol

(PC link)

9.6

(9600 bps)

EVN

(Even)

Communication
protocol (PSL)

Communication
address (ADR)

Baud rate
(BPS)

Parity
(PRI)

Stop bit
(STP)

Data length
(DLN)

12.2.2

Setting the Communication-Related Parameters

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 "PSL" for
setting the communication protocol.
Press the UP or DOWN key to display the communication
protocol number on the DATA display.

Press this key for
more than 3 sec.

The decimal point blinks during
data change.

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

Setup Parameter Screen 1

Setup Parameter Screen 2

Operation Parameter Screen

Power ON

This completes the process for
setting the communication protocol.

Parameter "PRI" for setting the parity

Parameter "STP" for setting the stop bit

Parameter "DLN" for setting the data length

Parameter "BPS" for setting the baud rate

Parameter "ADR" for setting the communication address

Follow the same procedure to set the following parameters:

Press to display

"LOC."

Press to display

"-1."

Press .

Press to display

"PSL."

Press or

to display the communication
protocol number to use.

Press .

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 accept this data.

Press the SET/ENT key to display the next parameter.

See Also

For more information on the communication functions, refer to the M Series Digital
Limit Alarms Communication Functions User’s Manual (IM 77J04J11-01E) sold
separately.

13. TROUBLESHOOTING

Error Indication

Description

of Error

Status

Alarm

Output

Monitor

Output

Remedy

᭿

Possible Errors Occurring at Power ON

The following describes possible errors occurring at power ON.

᭿

Possible Errors Occurring during Operations

The following describes errors that may occur during operations.

PV Display

Alarm

Indicator

Lamps

READY

Lamp

Error Indication

Description

of Error

Status

Alarm

Output

Monitor

Output

Remedy

PV Display

Alarm

Indicator

Lamps

READY

Lamp

Undefined

OFF

Blinking

Normal

AL2

blinking

AL1

lights

Undefined

Undefined Undefined

Undefined

OFF

Normal

None (0%)

OFF

None

(0%)

None

(0%)

None

(0%)

0% or less

CPU

failure

Power

failure

RAM

error

ROM

error

Parameter

error

EEP sum

error

EEPROM

error

OFF

blinks

Failure.

Submit request for us to
repair.

Failure.
Submit request
for us to repair.

Check all
parameters.

Normal

Burnout

Normal

Decimal point

blinks

Press any key, or if
normal communication is
made, a communication
error will be cleared.

Normal

Communication

error

Normal

Check input.

Input
exceeding
high limit

110% of the
measured
range

106% or more
of the output
range

-6% or less
of the output
range

106% or more
or -6% or less
of the output range

-10% of the
measured
range

110% or -10%
of the measured
range

Input falling
below low
limit