ModMAG M1000 - Digital Outputs Configuration; Pulse and Frequency Output Settings; Output Function Selection

Inputs/Outputs
Digital Outputs
(continued on
nextpage)
Pulse Width
S
This parameter establishes the “On” duration of the transmitted pulse. The
configurable range is 0…2000 ms. If 0 ms is configured, pulse width is
automatically adapted depending on pulse frequency (pulse/pause ratio 1:1).
During the configuration, the program checks if pulses/unit and pulse width are
in accordance with full scale defined. If not, an error alarm is displayed. In case of
an error alarm, scale, pulse width or full scale need to be adapted.
Pulses/unit
S
The pulses/unit parameter lets you set the number of pulses per unit of measure
that will be transmitted. The maximum output frequency of 10,000 pulses/sec.
(10 kHz) must not be exceeded.
For example, assuming the unit of measure is gallons:
• Setting the pulses/unit to 1 will transmit 1 pulse every gallon
• Setting the pulses/unit to 0.01 will transmit 1 pulse every 100 gallons
You must configure pulses/unit if the function of the selected output is to be
forward, reverse or AMR pulse.
Frequency
S
This parameter establishes the digital output as frequency output. The full scale
frequency configurable range is 0.01…10,000 Hz.
Set Min./Max.
S
The Flow Set Point (min., max.) establishes, as a percentage of full scale flow,
the threshold at which the output alarm will be activated. You can freely select
thresholds in 1% steps. Flow rates below/above the threshold will activate the
output alarm.
Preset Amount
S
Preset amount lets you set the reset value for the associated PS totalizer when
the digital input is set to Batch Reset. You can configure preset amount in the
adjusted volume unit.
Preset amount is counted down from the configured value to 0 and a digital
output shows that the preset amount has been reached.
Out 1 Function
Out 2 Function
S
(continued on
nextpage)
From the sub-menus Out 1 Function and Out 2 Function, you can configure
functional operation of the 2 digital outputs. For example, you can select
“forward pulse” for the digital output and define the pulses-per-totalizer unit via
“pulse scale.”
The two outputs can be operated as open collector passively or actively.
Passive output: Active output (if analog output is not used):
ModMAG® M1000 Electromagnetic Flow Meter
Page 30 March 2020MAG-UM-00379-EN-07