Alarm - Alarm; Rb_Char - Calculate Back To Characteristic; Test - Test; Alr_Enab - Alarm Through The Analog Output - ABB TZIDC Manual

TZIDC, TZIDC-200 DIGITAL POSITIONER | COI/TZIDC/TZIDC-200-EN REV. B
ALARM – Alarm
When an alarm / message is generated in the positioner, it is
signaled via the digital and analog outputs. You can use the
ALARM parameter to select a higher or lower alarm current for
analog feedback.
Note
Without electrical power or during initialization the output signal
is > 20.5 mA. A special version (hardware change) is also
available, with which a value of < 3.8 mA is also possible.
HIGH_CUR
Alarm current I > 20.5 mA
LOW_CUR
Alarm current I < 3.8 mA
RB_CHAR – Calculate back to characteristic
This parameter is used to determine whether the position
indicator and the analog position feedback follows the
characteristic set by the CHARACT characteristic curve
parameter.
TEST – Test
Test is for simulation of the analog output. The test allows you
to simulate effects during commissioning without affecting the
normal process.
Note
The test is automatically stopped after two minutes.
While the test is running, the corresponding message (see
below) flashes in the display.
NONE
No function
FAILED
Simulation of position feedback failure (CPU).
I > 20.5 mA (standard) or I < 3.8 mA (special design, changed
hardware)
ALRM_CUR Simulation of an alarm current < 3.8 mA or I > 20.5 mA
CURRENT Output of the current setpoint as current value via analog
output. Any configurations and settings of the analog
input- and / or output should be observed.
ALR_ENAB – Alarm through the analog output
Enables the alarm signal to be switched on / off using the
optional analog output module.
Selection option: ON / OFF.
CLIPPING – Extending the signal output range
Enables extension of the permissible signal output range from
3.8 bis 20.5 mA.
Selection option:
• 4.0 to 20.0 mA
• 3.8 to 20.5 mA
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