IM 01C25R03-01E
6-1
6. EXPLANATION OF BASIC ITEMS
6.
EXPLANATION OF BASIC ITEMS
6.1 Outline
This chapter describes the SENSOR transducer block,
the LCD transducer block, and the AI function block
and explains basic parameter settings. Refer to Appen-
dixes for other function blocks, LM function, and
software download function.
6.2 Setting and Changing Param-
eters for the Whole Process
IMPORTANT
Do not turn off the power immediately after
setting. When the parameters are saved to the
EEPROM, the redundant processing is executed
for an improvement of reliability. If the power is
turned off within 60 seconds after setting is
made, the modified parameters are not saved
and the settings may return to the original
values.
Block mode
Many parameters require a change of the block mode
of the function block to O/S (Out of Service) when
their data is changed. To change the block mode of the
function block, its MODE_BLK needs to be changed.
The MODE_BLK is comprised of the four sub-
parameters below:
(1) Target (Target mode):
Sets the operating condition of the block.
(2) Actual (Actual mode):
Indicates the current operating condition.
(3) Permit (Permitted mode):
Indicates the operating condition that the block
is allowed to take.
(4) Normal (Normal mode):
Indicates the operating condition that the block
will usually take.
6.3 SENSOR Transducer Block
The SENSOR transducer block is in between the
sensor and the AI function blocks. It calculates
differential pressure, static pressure, external tempera-
ture, and capsule temperature from sensor signals.
Then it performs damping and range checks for the
measured values of these three variables and sends
signals to the AI function block and Flow transducer
block. Figure 6.1 presents the signal flow between
blocks.
6.3.1 Functional block
Figure 6.2 presents the functional block of the SEN-
SOR transducer. The calculated values of differential
pressure, H-side static pressure, L-side static pressure,
external temperature capsule temperature, and amplifier
temperature, are assigned to PRIMARY_VALUE,
SECONDARY_VALUE, TERTIARY_VALUE,
EXT_TEMP_VAL, CAP_TEMP_VAL, and
AMP_TEMP_VAL, respectively. Measured values
output to the AI function blocks are selected by the
Channel parameter of those blocks.
F0601a.EPS
Sensor Transducer Block
PRIMARY_VALUE [DP]
(Channel1)
SECONDARY_VALUE [SP-H]
(Channel2)
TERITARY_VALUE [SP-L]
(Channel3)
EXT_TEMP_VAL
(Channel4)
CAP_TEMP_VAL
(Channel6)
AMP_TEMP_VAL
(Channel7)
Flow Transducer Block
FLOW_VAL
(Channel5)
AI Function Block
CHANNEL=?
AI
AI
AI
AI
Figure 6.1 Signal Flow Diagram
