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DO output
Description
● Select the total pulse and status (warning and flow rate switch, total switch, etc.) output.
● DO output types (common to DO1 and DO2):
Settable range
NOT USED
:
Does not use the contact output.
+Vol.TOTAL PULSE
:
Outputs the forward total flow pulses.
-Vol.TOTAL PULSE
:
Outputs total flow pulse in reverse direction.
+MassTOTAL PULSE :
Outputs the forward total flow pulses.
-MassTOTAL PULSE :
Outputs the reverse total flow pulses.
FULL SCALE 2
:
Contact output is activated during FULL SCALE 2 measurement status. (Automatic 2-range, bi-directional
ALARM
ALL
:
Contact output is activated at HARDWARE FAULT or PROCESS ERROR.
HARDWARE FAULT
:
Contact output is activated at a circuit error (of memory etc.).
PROCESS ERROR
:
Contact output is activated when no waves are received, or waves are unstable.
Vol.FLOW SWITCH
Vol.FLOW SW HIGH
:
Contact output is activated when the instantaneous volume flow rate exceeds the setting value.
Vol.FLOW SW LOW
:
Contact output is activated when the instantaneous volume flow rate drops below the setting value.
MASS SWITCH
Vol.FLOW SW HIGH
:
Contact output is activated when the instantaneous mass flow rate exceeds the setting value.
Vol.FLOW SW LOW
:
Contact output is activated when the instantaneous mass flow rate drops below the setting value.
Vol.TOTAL SWITCH
:
Contact output is activated when the flow rate total value is equal to or greater than the setting value.
MassTOTAL SWITCH :
Contact output is activated when the mass total value is equal to or greater than the setting value.
RANGE OVER
:
Contact output is activated when either the range upper limit setting or lower limit setting for either the
PULSE RANGE OVER :
Contact output is activated when flow rate total pulse output and mass total pulse output exceed the
-:FLOW DIRECTION
:
Contact output is activated when the flow is in reverse direction.
INPUT ALARM
:
Contact output is activated when the analog input AI range exceeds 120% or -20%.
MAINTENANCE
:
The contact output is activated when the maintenance period has elapsed.
CONTACT ACTION
ACTIVE ON
:
Normally off
ACTIVE OFF
:
Normally on
If the contact action is set to "ACTIVE OFF", DO output is provided when the power is turned on.
Check if DO output can be modified before setting.
<Note> DO output specifications
DO1/DO2 : Open collector, Contact capacity 30V DC, 50mA
When total pulse output is selected (Note: See 4.8.2.1 )
100 pulses/s or less (at full scale flow rate)
Pulse width: 5, 10, 50, 100, 200,500 and 1000ms.
For concrete keying, refer to the typical operation indicated below. Set the protection to OFF beforehand. (See Section 4.4.1.)
range, bi-directional automatic 2-range)
Activates with either the volume flow rate or mass flow rate set with the analog output source designation
(see section 4.8.1.3).
Contact output is activated when the resistance temperature detector breaks.
volume flow rate or mass flow rate set with the analog output source designation (see section 4.8.1.3) is
exceeded.
maximum frequency limit.
Contact output is activated when the resistance temperature detector measurement range (-45 to 205°C) is
exceeded.
The maintenance period is set for two years.
－53－
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