User manual

IEC61131 User and Reference Manual
April 22, 2008
268
Inputs
Type
Description
input
Integer
Pulse Input
type
Integer
Input type
0 = 32 bit running counter
1 = 32 bit difference
units
Integer
Rate period
0 = seconds
1 = minutes
2 = hours
3 = days
period
Integer
Specified record to be displayed (1 to 35).
ID
Integer
Identifies the internal flow accumulator (1 to 32).
Outputs
Type
Description
status
Integer
Status
0 = no error
1 = invalid K input
2 = invalid Period input
3 = invalid Type input
4 = invalid Units input
5 = pulse rate is too low for accurate flow rate calculation
6 = invalid ID, or use the obsolete Flow Block without ID
7 = no memory available
rate
Real
Flow rate
vol1
Real
Volume for period 1
end1
Integer
Time at end of period 1
Unix time. Seconds from January 1, 1970
time1
Integer
Flow time for period 1
Time in seconds
volP
Real
Volume for period P
endP
Integer
Time at end of period specified
Unix time. Seconds from January 1, 1970
timeP
Integer
Flow time for period P
Time in seconds
Notes
The flow function block stored data is retained when the program is stopped, power is cycled
or the controller is reset. The stored data is cleared when the controller is initialized or when
the enable input is OFF.
SCADAPack firmware 1.55 or newer or SCADAPack 32 firmware 1.16 or newer is needed to
use the flow function block.
The maximum pulse rate is 10 kHz. Measuring the accumulated pulses and dividing by the K
factor calculates the accumulated flow. The K factor cannot be changed while an
accumulation is in progress. Only change the K factor while accumulation is stopped..