YOKOGAWA UT35A-L, Руководство пользователя

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11-4
IM 05P04D41-01EN
PV Velocity Alarm
PV
VT VT VT VT VT VT
PV velocity
alarm output
Time
An alarm occurs if the velocity
exceeds this inclination.
OFF OFF OFF ON ON
Velocity alarm
time setpoint
VT1 to VT3
Velocity alarm
setpoint
Velocity alarm
setpoint
Velocity alarm
time setpoint
VT1 to VT3
Exceeds the velocity
Contact type in the figure above: Energized when an event occurs (factory default).
Monitors the variation of the measured value for 2 points by the time
interval set in VT.
The PV velocity alarm function does not work the alarm hysteresis, the stand-by action
and the alarm delay timer functions.
Fault diagnosis Alarm
The function outputs an alarm signal in the following cases.
The corresponding event (EV) lamp is lit and the contact output turns on (when the
contact type is energized).
• Burnout of PV input
• ADC failure of PV input
• Reference junction compensation (RJC) error of PV input
The fault diagnosis alarm does not work the stand-by action functions.
FAIL output
When the FAIL condition is caused (faulty MCU or system data error), DO (alarm output)
turned off regardless of contact type.
The FAIL output does not work the alarm latch, the energized/de-energized and the
stand-by action functions.
11.1 Setting Alarm Type