Yokogawa Wireless Temperature Transmitter YTA510 - Manual (Page 26)

<5. Configuration>
5-13
IM 01C50T02-01E
If you want to switch back to select sensor 1
input while the backup action is active after
the sensor 1 input recovers, set 1 (Enable) in
BACKUP_RETURN_SENSOR1. Because
this data is not retained, set 1(Enable) in the
parameter every switch back.
When there is no connection to sensor 2 input,
the status of BACKUP_VALUE is Bad and the
value is undefined.
 Parameters Related to Limit Switches
Parameters whose names begin with “LIMSW”
store the settings for limit switch signals output
to DI function blocks. The transducer block
has 4 limit switches numbered from 1 to 4, and
these parameters determine the specifications
of the respective switches. In the following
parameter names and descriptions, read the
number “1” as “2,” “3,” or “4” according to the
intended limit switch number.
LIMSW_1_VALUE_D
Stores the value and status of limit switch 1.
LIMSW_1_TARGET
Stipulates the value that should be compared
with the threshold. PRIMARY_VALUE_1,
PRIMARY_VALUE_2, SECONDARY_VALUE,
DIFFERENTIAL_VALUE, AVERAGE_VALUE,
or BACKUP_VALUE can be chosen.
LIMSW_1_SETPOINT
Stipulates the threshold of switching on limit
switch 1.
LIMSW_1_ACT_DIRECTION
Stipulates whether limit switch 1 should work as
a high limit switch or low limit switch.
LIMSW_1_HYSTERESIS
Stipulates the hysteresis of limit switch 1.
 Parameters Related to Display
For a model with the Integral indicator, the
display information can be selected by
parameters that have names beginning with
“DISPLAY.” For the details of contents to be
displayed, refer to section 6.4.
DISPLAY_AI_OUT
Specify an AI block number or numbers to
select the AI blocks whose output values should
be displayed on the LCD. If two or more AI
blocks are selected, the respective values are
displayed in turn cyclically.
DISPLAY_ERROR
Select whether to display the error code on the
LCD. Selecting 1 (INHIBIT) will hide the error
code from the LCD even when an error occurs.
DISPLAY_WARNING
Select whether to display the warning code
on the LCD. Even if this parameter is set to
‘SHOW’, error code for warning will not be
shown when the functions themselves are
disabled by parameters WARNING_ENABLE_
#.
DISPLAY_ADDRESS
Select whether to display the device address on
the LCD.
DISPLAY_CYCLE
Sets the display refresh cycle.
 Parameters Related to Warnings
Faults found as a result of self-diagnostics of
the YTA320 are categorized into errors and
warnings. Warnings can be hidden from the
LCD as necessary by changing the values of
the parameters below. Refer section 7.4 for the
notes on using Warning function.
WARNING_ENABLE_1, (2, 3, 4)
Switches on and off the generation of warnings.
 Parameters Related to Input
Calibrations
The number “2” enclosed in parentheses
appearing in the following parameter names
and descriptions indicates that the preceding
number “1” should be read as “2” for the cases
of sensor 2, respectively.
CAL_STATE_1 (2)
Shows if user adjustment function for
Sensor1(2) input is invalid(User Cal off) or
valid(User cal on). Setting ‘2(Calibration Exec)’
will allow users to adjust the input.
IMPORTANT
If you changing the sensor type once after
making user adjustment function valid, re-do
user adjustment or set ‘0(User Cal off)’ to CAL_
STATE_1 (2) to make the function off.