Yokogawa EJX930A - Manual (Page 55)

<6. Explanation of Basic Items>
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IM 01C25R03-01E
F0609.ai
ALARM_OPTS=HI_HI | HI | LO_LO
(A case of HI_HI, HI and LO_LO options are selected)
HI_HI_LIM
HI_LIM
LO_LO_
LIM
OUT_D.value = 0
OUT_D.value = 1 OUT_D.value = 1 OUT_D.value = 1 OUT_D.value = 1
Figure 6.6 An Example of OUT_D.value
6.6.6 Basic Parameters of the AI Block.
Parameter Outline
OUT Shows output value and status. When the Block mode is Man and O/S, the value is held.
SIMULATE Used for simulation. It sets the value and status arbitrarily from the transducer. Use this parameter for
loop checking. Refer to 7.3 Simulation Function.
XD_SCALE Sets the range of inputs from the transducer block that corresponds to 0% and 100% in the AI function
block. Also sets the unit of the range, inputs values that correspond to 0% and 100%, and four decimal
values.
OUT_SCALE Sets the range, unit, and digit of the output scale.
CHANNEL
Selects the signal which is calculated in SENSOR Transducer Block. The relation between the signals
and channels are shown below;
Channel 1: PRIMARY_VALUE (pressure/differential pressure)
Channel 2: SECONDARY_VALUE (H-side static pressure)
Channel 3: TERTIARY_VALUE (L-side static pressure)
Channel 4: EXT_TEMP_VALUE(external temperature)
Channel 5: FLOW_VALUE(flow)
Channel 6: CAP_TEMP_VAL (capsule temperature)
Channel 7: AMP_TEMP_VAL (amplifier temperature)
Channel 8: FLG_TEMP_VAL (flange temperature, option code: /DG1)
Flow value(channel 5) can be assigned to only one AI block at one time.
Other variables can be assigned to one or more AI blocks simultaneously.
L_TYPE The operation function of the AI function block can be selected from Direct, Indirect Linear, or Indirect
SQRT:
Direct: The Signal from the transducer block is directly output by filtering only, but without scaling or
square root extraction.
Indirect Linear: Values scaled according to the range settings of XD_SCALE and OUT_SCALE are
output.
Indirect SQRT: The square root extraction is performed to the values scaled according to the range
settings of XD_SCALE. The square root values are scaled and output according to the range settings
of OUT_SCALE.
LOW_CUT When the output value is smaller than the value set by this parameter, the output value is 0. To enable
the low-cut function, this parameter must be enabled in IO_OPTS. The setting is in an engineering unit of
OUT_SCALE. 1% of OUT_SCALE is applied as hysteresis.