5
Main Menu:
The Main menu consists o the ollowing steps:
De ine list o parameters used, Con igure Inputs, Setup
Counters, Setup Ratemeters, Setup Relays / O.C., Setup
Security, Setup 4-20mA Output, Setup Comm Port, De ine reset
options and Back to RUN mode (or Exit programming). The
PROG key allows scrolling through these steps. All these steps
are given in brie below:
Define list f parameters used:
The unit is capable o showing nine di erent parameters. The
parameters are the readings 918 RTP gives a ter a pulse input
is given to it. The parameter names are ixed in Default M de
and are user programmable in Message M de.
The parameter names in De ault Mode are:
Rate A, Rate B, Rate A+B, Rate A-B, Total A, Total B, Total A+B,
Total A-B and Gr. Total.
The parameter names in Message Mode are user de inable.
The length o these user de ined names can be upto nine
characters. Valid characters are SPACE, A-Z, a-z, 0-9, /.
The menu also enables the user to de ine the sequence in
which the parameters are to be viewed at Run time and the no.
o digits a ter the decimal point (0-3). It also enables the user to
program the message or each parameter.
C nfigure Inputs :
The unit has ive inputs, two o which are pulse inputs and the
remaining three are control inputs. The two pulse inputs are
Input A and Input B. They can programmed to be either linear
or non-linear.
For linear input a six digit multiplier scaling actor has to be
entered (.00001 to 999999). This scaling actor is constant or a
linear input. For a non-linear input the scaling actor is di erent
at di erent requencies so the points (Frequency, Factor) have
to be entered. The unit supports a maximum o sixteen such
points. Input B is normally a separate input with separate
scaling. It can also be programmed as a control input or up
counting or down counting o Total A. A High on Input B makes
Total A count up and a low on Input B makes Total A count
down.
The remaining three inputs C, D and E are control inputs and
can be programmed to control actions such as start counting,
reset counting, stop counting, reeze display, lock unit and print
activities.
When reeze display is activated (or a pulse is applied to the
control input which is con igured to reeze display) the unit
stops re reshing the display. The unit continues to run in the
background.
Setup C unters:
918 RTP has ive counting parameters:
Parameter Default name Functi n
Counter A Total A Counts pulses on A
Counter B Total B Counts pulses on B
Counter A+B Total A+B Adds counter A & B
Counter A-B Total A-B Subtracts counter B rom
counter A
Grand Total Grand Total Tracks any o the above
our on which it is pro-
grammed to be dependent.
Each counter can be reset to zero or disabled. The Grand Total
is programmable and can be set to ollow any o the remaining
counters.
Setup Ratemeters :
The parameters Rate A, Rate B, Rate A + B, Rate A - B can be
programmed to be rate/seconds, rate/minutes, rate/hours. The
user can use custom scaling i the units are di erent than RPS,
RPH, RPM e.g. rate/day, so that the rates can be converted to
engineering units. The custom scaling actor can be o 6 digits
ranging rom 0.00001 to 999999. The normalizing actor
ranging rom 0.1 to 99.9 can be programmed.
Normalizing Equation:
(Old Data x "Normalizing Factor" + New Data)
("Normalizing Factor" + 1)
For rate display, a time o up to 25 seconds can also be
applied.
Setup Relays:
The unit has two control outputs NO/NC relay A or Open
Collector A and NO/NC relay B or Open Collector B. The
control outputs can be programmed to track any o the nine
parameters and can also be programmed to operate in Timed
M de ( or count) or Hysterisis M de ( or rate).
In Timed mode (count) a low preset value or a high preset value
can be entered. I a l w preset value is entered then the
control output will energize whenever the value o the param-
eter, which the control output is tracking goes bel w the preset
value. I a high preset value is entered then the control output
will energize whenever the value o the parameter, which the
control output is tracking goes ab ve the preset value. In Timed
mode (count) a ter low preset or high preset have been entered
unit will ask or reset time (the time duration that the control
output will remain energized). Set time rom 0.1 to 99.9 sec.
with auto reset o counter. I set to 00.0, count continues and
output is latched until reset by external or ront panel reset.
In Hysterisis mode (rate) b th the high preset and low preset
or the Hysterisis have to be entered. The control relay will
activate when the rate parameter is equal t or exceeds the
high preset. The relay will remain energized until the rate
parameter all bel w the low preset.
PROGRAMMING MENU
