YOKOGAWA FLXA402T, User Manual

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<4. Setting converter>
4-9
IM 12A01G01-03EN 1st Edition : Mar. 25, 2021-00
Low: Output is fixed to 2.2 mA, set this for burn-down.
High: Output is fixed to 22.0 mA, set this for burn-down
When failure is detected on the sensors you set on Process parameter slot, burn is output only
for the sensor. Sensors you did not set on [Process parameter slot] do not output burn even when
their failure is detected.
Whenever the converter’s failure is detected, it outputs burn value.
* If a communication error inside of the converter is detected, the converter seeks the error location: first or second sensor module.
When the analog sensor module you set detects an error, burn is output.
l Damping time
This is the time taken for a response to a step input change to reach 90% of the final value
(attenuation time). Set this time in sec.
l mAn Range setting
Select from the following ranges.
mA1: “Manual range select”, “Contact input select”, “Auto 2 ranges select”,
“Auto 3 ranges select”.
mA2, mA3, mA4: “Manual range select”, “Contact input select”
This setting enables mA ouput in the range configured by the manual range select.
Remote range switch function changes range by DI. Refer to 4.2.3 and setup contact input.
When you select auto-range for mA1, the range is recognized at contact output. See 4.4.
When auto range is selected, the changeover point is settable.
When switching from the lower range to the higher range, the range switches at the changeover
point. When switching from the higher range to the lower range, the range switches at -10% point
of the changeover point. When auto range is used, the value of 0% is always recognized as “0”.
4.3.2 Simulate
When this function is selected, an output of the instrument will be a fixed current value, which is
set in % of the output span. The output span range is -11.25% to 112.5% (2.2 mA to 22.0 mA).
When “Simulate” is selected, regardless of hold setting, the output is always simulated value.
Host devices enables the converter to output simulated mA via MODBUS communication without
changing the setting on HMI.
After you activate Simulate, the simulated output can remain even after the power is off.
However, a simulated output via MODBUS communication is deleted when the power turns off
during the simulation.
mA output automatically leads to hold during device configuration. However, when Simulate is
selected, each simulated value is output immediately according to respective configuration.
When mA output is simulated, Check Function occurs.
4.3.3 Configure Hold
Configure Hold performs a setup to hold the mA-output during hold to a known value. This
function is enabled only when “Output” is selected for mA.
There are two types, automatic or manual hold. Automatic hold holds mA value during the device
configuration, calibration/wash, maintenance mode or during plateau data acquisition. Manual
hold is operated manually.
During Setting devices, the status is always “hold”.
Read 3.5
Hold operation (manual Hold) for further information on Hold.