IM 01C25R03-01E
A-11
APPENDIX 2. INTEGRATOR (IT) BLOCK
A2.2.3 Converting Accumulation
This following describes an example of accumulation conversion.
In accumulation conversion, the difference between the value executed previously and the value executed this time is
integrated or accumulated. This conversion applies when the output of a function block used as a counter is input to
the input process of the Integrator block.
In order to convert the rate of change of an input to a value with an engineering unit, the user must configure the
factor of conversion to the appropriate engineering unit in the PULSE_VAL1 and PULSE_VAL2 parameters.
Moreover, the unit of IN_2 is standardized to that of IN_1 in the same way as rate conversion. Thus, the user must
also set an appropriate value to UNIT_CONV.
input1
counts
number of pulse
kg
kg/pulse
increment1
increment2
lb/pulse
input2
counts
number of pulse
lb
kg
[Current read value] – [Previous read value]
[Current read value] – [Previous read value]
PULSE_VAL1(#19)
ⴛ
[pulse value1]
PULSE_VAL2(#20)
ⴛ
[pulse value2]
UNIT_CONV(#18)
ⴛ
[conversion factor]
FA0203.EPS
Figure A2.3 Increment Calculation with Counter Input
A2.2.4 Determining the Input Flow Direction
The Integrator block also considers the input flow direction. Information about the input flow direction is contained in
REV_FLOW1 and REV_FLOW2 (0: FORWARD, 1: REVERSE).
In input processing, the sign of the value after rate and accumulation conversion is reversed if the REV_FLOW1 and
REV_FLOW2 parameters are set to REVERSE. When determination of the flow direction of two input values is
complete, these two inputs are passed to the adder. The settings in REV_FLOW will be retained even if the power is
turned OFF.
