190
Basic Examples of PID Control Section 5-1
5-1-7 Monitoring and Accumulating Flowrate
Function blocks used: PI 4-point Terminal (Block Model 562)
Accumulator for instantaneous value input (Block
Model 150)
Connect the instantaneous value output value of the PI 4-point Terminal block
to the Accumulator for instantaneous value input block when accumulating 8-
digit accumulated values based on the instantaneous values from the Pulse
Input Unit CS1W-PPS01.
Example Let's apply scaling of 0 to 6000 to zero (0%) through to span (100%) of the
pulse input instantaneous value, and set accumulation to maximum 1200.00
per hour. (The accumulated value is taken to be 1200.00 when 6000 has con-
tinued for 100% for one hour.) The accumulation result is stored to ITEM012
and ITEM013 of the Accumulator for instantaneous value input block.
Note This instantaneous value differs from the instantaneous value, that is reflected
in words n+1 to n+4 allocated to the Pulse Input Unit CS1W-PPS01 in the CIO
area, in that the instantaneous value is for each operation cycle of the PI 4-
point Terminal block.
AI 4-point
Terminal
Block Model 586
PV
Basic PID
Block Model
011
Analog input
MV
Analog/Pulse
Width
Converter
Block Model
192
DO 16-point
Terminal
Block Model
514
Contact output
Time-
proportional
Contact
Distributor
Block Model
201
Accumulator for
instantaneous
value input
Block Model 150
Instantaneous
value
Pulse input
PI 4-point
Terminal
Block Model 562
Block
address
ITEM No. Data Explanation
901 002 562 PI 4-point terminal block
010 3 Instantaneous value output range 3: 0 to 6000
021 0 to 115.00% Y1 (instantaneous value output value 1) (See Note.)
100 002 150 Accumulator for instantaneous value input
007 901021 X1 source designation
008 Input
009 1200.00 QR accumulation rate (accumulation value when input 100%
is continuous for one hour)
010 2 TU time unit (2: time)
012 0000 to 9999 Accumulated value (lower 4 digits)
013 0000 to 9999 Accumulated value (upper 4 digits)
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