Yokogawa Wireless Temperature Transmitter YTA510 - Manual (Page 18)

IM 01C50T03-01E 3-11
3. OPERATION
transmitter will send the error code for Sensor2 failure
to the integral indicator and the BT200, and outputs the
“Sensor burnout” value.
(a) Setting of backup mode
H20: SNSR BACKUP
Set “ENABLE” at H20: SNSR BACKUP.
ENABLE : Activates backup mode, and
transmitter starts to observe.
DISABLE : Cancels backup mode.
IMPORTANT
Do not change the PV and SV mapping data
when the sensor backup mode is active. Cancel
the sensor backup mode to alter the mapping
data.
(b) Returning from Sensor2 to Sensor1 during
the sensor backup operation
H21: RETURN SNS1
Once the transmitter enters the sensor backup opera-
tion, H21:RETURN SNS1 appears on the BT200. This
parameter is used to retrieve the output to the Sensor1
input value. Ensure that Sensor1 and Sensor2 are both
correct input status, then;
Set “ENABLE” at H21:RETURN SNS1.
ENABLE : Switches to Sensor1 output.
DISABLE : Maintains Sensor2 output status.
IMPORTANT
In the sensor backup operation, even if the
Sensor1 recovers, the Sensor2 input value
continues to be output until “ENABLE” is set at
H21: RETURN SNS1 or the transmitter's power
is turned off and then on again.
3.2.12 Copy the Setting Data
H30: UPLOAD SELCT
This function is used to copy the setting data of one
temperature transmitter to another.
Connect the temperature transmitter with the BT200
and record (UPLOAD) the setting data to the BT200
nonvolatile memory. By connecting the BT200 to other
temperature transmitters, recorded data can be over-
written (DOWNLOAD) on the transmitters.
The YTA series temperature transmitter handles the
uploading data at two levels. It is necessary to specify
the desired one before uploading data.
SET PRAM ONLY : Uploads the parameters
with respect to the opera-
tion settings such as LRV
and the sensor type.
ALL PRAM : Uploads the all param-
eters.
See the parameter list at the end of this manual for
classification of the operation setting parameter groups
and the parameter group unique to the equipment. See
also the BT200 instruction manual, IM 1C0A11-01E,
for the setting procedure.
3.2.13 Write Protect Function
(a) Software Write Protect Function
H40: WRITE PROTCT
The write protect function is used to prevent unautho-
rized configuration data changes in the transmitter.
YES : Disables writing of all parameters
other than H40.
NO : Enables writing of all param-
eters.
If the transmitter is equipped with the integral indica-
tor, the LCD displays “W.P.” when setting H40 to
YES.
F0309.EPS
ESC
SET
H40:WRIT PROTCT
NO
<NO >
<YES >
● Example: Setting write protect on
1. Select “YES” and press
[ENTER] twice to enter
the setting.
"W. P." lit on
(b) Hardware Write Protect Function
Hardware write protect function is set up by Switch
(SW2) on the CPU assembly. Under write protect
status, any change operation is denied. If the transmit-
ter is equipped with the integral indicator, the LCD
displays “W.P.” when setting SW2 to “Y”.