<3. Parameter Setting>
3-16
IM 01C50T03-02EN
3.2.13 Output Adjustment
The Output Adjustment function adjusts analog
output values. When a precision ammeter (for
calibration) is connected, when the 0% and 100%
are output, and if there is a deviation in PV value,
the Output Adjustment is executed.
Use the following parameters for adjustment
purposes.
Parameter
Usage
I30:OUTPUT Sets the Output mode. Set the analog
output to NORMAL (Normal Output), 4
mA, or 20 mA.
I31:OUT
ZERO
Output adjustment: Zero-point
adjustment
I32:OUT GAIN Output adjustment: Gain point
adjustment
I33:OUT ADJ
CLR
Output adjustment: Clear of data
[Adjustment method]
(1) Write “4 mA” in “I30:OUTPUT”, and output 4 mA
current.
(2) Read the actual output PV value using the
precision ammeter for calibration.
(3) Write the PV value that was read in Step (2), in
“I31:OUT ZERO”.
If only the zero-point adjustment is required,
skip Steps (4), (5) and (6), and proceed to Step
(7).
(4) Write “20 mA” in “I30:OUTPUT”, and output 20
mA current.
(5) Read the actual output PV value using the
precision ammeter for calibration.
(6) Write the PV value that was read in Step (5), in
“I32:OUT GAIN”.
(7) Write “NORMAL” in “I30:OUTPUT”, and return
to the normal output.
3.2.14 Sensor Backup (for the 2-input
model only)
If Sensor1 has failed, the Sensor Backup function
automatically uses Sensor2 as output.
Even if Sensor1 is recovered during backup
operation, Sensor2 will continue to be used until
the backup operation is reset by the parameter
or by switching the power OFF. If Sensor2 has
failed during backup operation, the temperature
transmitter generates an AL.24 “Backup Sns2 Fail”
alarm and outputs the sensor burnout.
(1) Setting the sensor backup function
(1) Set the “sensor type” and “number of wire
connections” of Sensor1 and Sensor2. If
Sensor1 and Sensor2 must measure the same
target (both should measure the temperature or
voltage).
(2) Set an alarm mask appropriately.
Setting
parameter
Target
Alarm
Default
value
Setting
value
K10:S1 FAIL
MASK
AL.10 S1
Failure
NO MASK NO MASK
K11:S2 FAIL
MASK
AL.11 S2
Failure
NO MASK NO MASK
K12:S1
SHRT MASK
AL.12 S1
Short
MASK
MASK/
NO MASK
K13:S2
SHRT MASK
AL.13 S2
Short
MASK
MASK/
NO MASK
K23:BKUP
S1 MASK
AL.23 Backup
S1 Fail
NO MASK NO MASK
K24:BKUP
S2 MASK
AL.24 Backup
S2 Fail
NO MASK NO MASK
IMPORTANT
Always set “K10:S1 FAIL MASK”, “K11:S2 FAIL
MASK”, “K23:BKUP S1 MASK”, and “K24:BKUP
S2 MASK” parameters to NO MASK.
To activate the Sensor Backup function even if
the sensor short-circuit is detected, set "K12:S1
SHRT MASK" and "K13:S2 SHRT MASK" to
"NO MASK". If the Sensor Backup function is not
required when a short-circuit occurs, set them to
"MASK".
CAUTION
After Sensor1 has failed, a time lag occurs until
the transmitter detects it and switches to Sensor2.
During this time, the value measured by failure
Sensor1 is output as the PV value. The current
output is indefinite (however, it is within the range
between the calculation output lower limit and the
calculation output upper limit).
After that, the failure sensor is switched to
Sensor2, and the current corresponding to the
value measured by Sensor2 is output.
(3) Set the PV mapping to the Sensor Backup
function.
Setting
parameter
Setting value
B10:PV is
Sensor Backup
For details about mapping, refer to Section 3.2.3.
"Process variable mapping".
