SMC Networks PFCA7 Series User Manual

-16-
No.PF※※-OMA1002
■Definition and Terminology
Term
Definition
A
Accumulated flow
The total amount of fluid that has passed through the device.
If an instantaneous flow of 10 L/min lasts for 5 minutes, the accumulated flow will be
10 x 5 = 50 L.
Accumulated pulse
output
A type of output where a pulse is generated every time a predefined accumulated flow
passes. It is possible to calculate the total accumulated flow by counting the pulses.
Accumulated value
hold function
A function to store the cumulative flow value in the product's internal memory at certain
time intervals. Reads the memory data when power is supplied. Accumulation of data
begins with the value read at the moment power is supplied. The time interval for
storing to memory can be selected from 2 or 5 minutes.
Analogue input
Controls the flow rate that is proportional to the input signal. For analogue input of 1 to
5 V, the flow rate is controlled according to the input signal between 1 to 5 V. The same
applies to the analogue input of 4 to 20 mA.
Analogue output
Outputs a value proportional to the flow rate. When the analogue output is in the range
of 1 to 5 V, it will vary between 1 to 5 V according to the rate of flow. The same for
analogue output of 4 to 20 mA.
C
Commanded flow rate
Specified value for the controlled flow rate. In IO-Link mode: output process data; at
local setting: set local flow rate value; at analogue input: analogue input value.
Control accuracy
An error between the flow rate corresponding to the commanded flow rate and the flow
rate controlled by the product.
Control error
The condition in which the flow rate has not reached the commanded value
continuously for at least 5 seconds.
D
Delay time
Setting time from when the flow rate reaches the set value to when the ON-OFF output
actually operates. Setting a delay time can prevent the output from chattering.
Displayable range
Range which can be displayed.
E
Error output
Turns the switch output to OFF when an error is displayed.
Refer to "Error display" on page 72 for details of error codes.
F
F.S.
Full scale in the case of flow rate, meaning the max. flow rate in the rated control flow
range.
Full span in the case of the analogue output, meaning the variation width of analogue
output from zero flow rate to the max. rated control flow.
For example, when the analogue output is 1 to 5 V, F.S. = 5 V – 1 V = 4 V.
(Reference: 1%F.S. = 4 V x 1% = 0.04 V)
I
Instantaneous flow
The flow passing per unit of time. If it is 10 L/min, there is a flow of 10 L passing through
the device in 1 minute.
Internal voltage drop
The voltage drop across the product (and therefore not applied to the load), when the
switch output is ON. The voltage drop varies depending on the flowing load current,
and ideally it should be 0 V.
K
Key-lock function
Function that prevents changes to the settings (disables button operation).
M
Min. operational
differential pressure
The min. differential pressure value (pressure difference between primary and
secondary sides) required for the product to operate normally.
N
Normal condition
The flow which is converted into the volume at 0
o
C and 1 atm (atmospheric pressure).
[NOR] indicates that the product is in normal condition.
2023-12-20 14:49
DL145266

SMC Networks PFCA7 Series Specifications

General

Brand	SMC Networks
Model	PFCA7 Series
Category	Controller
Language	English