How to use INLO and INHI :How to use INLO and INHI :
If4-20mAisselected for INPT,let SL specifies the input signal low (
ie. 4 mA ), SH specifies the input signal high ( ie. 20 mA ), S specifies
the current input signal value, the conversion curve of the process
value is shown as follows :
INHI
process value
PV
INLO
SL SHS
input signal
Figure 3.1
Conversion Curve for
Linear Type Process Value
Figure 3.1
Conversion
Curve for
Linear
Ty p e Process Value
Formula : PV = INLO + ( INHI INLO )Formula : PV = INLO + ( INHI INLO )
SSLS SL
SH SLSH SL
Example : A 4-20 mA current loop pressure transducer with range
0 - 15 kg/cm is connected to input, then perform the
following setup :
Example : A 4-20 mA current loop pressure transducer with range
0
- 15 kg/cm is connected to input, then perform the
following
setup :
2
INPT=4-20 INLO=0.00
INHI = 15.00 DP = 2-DP
Of course, you may select other value for DP to alter the
resolution.
INPT = 4 - 20 INLO = 0.00
INHI
= 15.00 DP = 2-DP
Of
course, you may select other value for DP to alter the
resolution.
3-3 Event Input3-3 Event Input
The Event input accepts a digital type signal via momentary and close
contacts. The types of signal :
(1) relay or switch contacts, (2) open collector pull low and (3) TTL
logic level, can be used to switch the event input. one of eight functions
can be chosen by using ( EIFN ) contained in configuration page.
0 NONE : Event input no function
1 RUN : Applicable when unit is in static mode or Off mode
Requires only momentary type input
Event input close: unit will enter run mode
UM0P411B
45
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