<3. Operation>
3-13
IM 01C25T03-01E
c. Releasing Password
(D57: NEW PASSWORD)
To release the password, enter eight spaces at
D57: NEW PASSWORD during the period that the
parameter change is possible.
d. Software Seal (D58: SOFTWR SEAL)
When you lose the password that has been
registered, it is possible to release the write protect
function by using general password. Contact
Yokogawa about the general password. When
the password is used, the status shown in the
parameter D58: SOFTWR SEAL is changed from
KEEP
to
BREAK
. The status returns to
KEEP
by entering a newly set password at D56: WRT
ENABLE.
(12) Output Status Setup when a Hardware
Error Occurs
(D26: ERROR OUT)
This parameter allows the setting of the output
status when a hardware error occurs. The following
selections are available.
(a) BURNOUT DIR; Outputs the corresponding
values of 110% or –5% of output signals
according to the setting by burnout direction
switch (BO) on the CPU board.
(b) HOLD; Outputs the last value held before the
error occurred.
Note: A hardware error means CAP.ERR of AL.01 or AMP.ERR
of AL.02 which are shown in table 4.1 Alarm Message
Summary.
• Example: Set the output status to
HOLD
when
a hardware error occurs.
ESC
SET
D26:ERROR OUT
BURNOUT DIR
< BURNOUT DIR >
< HOLD >
Use the or key
to select
HOLD
.
Press the key twice to
enter the setting.
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Then press the (OK) key.
(13) Bi-directional Flow Measurement
Setup
(E30: BI DIRE MODE)
(a) This parameter enables selection of 50% output
at an input of 0 kPa.
Procedure is shown in the figure below.
(b) Combining this with
C40: OUTPUT MODE
provides a square root output computed
independently for 0% to 50% output and for
50% to 100% output.
• Example: If measurement range is 0 to 10 kPa
(LRV=0 kPa, URV=10 kPa)
The measurement range changes to –10 to 0 to 10 kPa
(output 0% to 50% to 100).
Note that
C21: PRES LRV
and
C22: PRES URV
are not changed.
ESC
SET
E30:BI DIRE MODE
OFF
< OFF >
< ON >
Use the or key
to select
ON
.
Press the key twice to
enter the setting.
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Then press the (OK) key.
20 mA (100% display)
4 mA (–100% display)
● Output mode “LINEAR”
LRV
URV
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20 mA (100% display)
Low Cut
4 mA (–100% display)
● Output mode “SQUARE ROOT”
LRV
URV
