SMC Networks PFM3 Series Operation Manual page 36

●External input-Auto shift, auto shift zero function
Auto-shift and auto-shift zero are function to output for relative change amount referring instantaneous flow,
when external signal is input, as a base. If auto-shift zero is set, display value is zero when external signal is
input.
See Operation example below.
<Ex.> This function is used during the confirmation of adsorption/release as a solution for flow rate change
due to source pressure fluctuation or nozzle diameter change. When auto-shift is not used, even if
the work is absorbed, switching operation is not made when the flow amount fluctuates. Auto-shift
function is useful for this case. If auto-shift function is used, switching operation is made based on the
time when auto-shift signal is input as a reference. Therefore, switching operation is available without
a fail as long as auto-shift signal is input during non-absorption period.
•When auto-shift in not used
Product: Flow sensor
hysteresis mode)
ON/OFF point of this setting
⋅⋅⋅ PFM510, Flow monitor (PFM3) switch set value: n_1=1.6, H_1=0.4 (Revers output,
•ON point: n_1
⋅⋅⋅
•OFF point: (n_1)+(H_1)
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No.PF##-OMJ0018