Table 5.4 Parameter Chart
14
PARAMETER
CONTROL NO.
E
T
A
D
INPUT
PROCESS UNITS
DISPLAY RESOLUTION
LINEAR INPUT LOW SCALE
LINEAR INPUT HIGH SCALE
PV SHIFT VALUE
PV FILTER TIME CONSTANT
OUTPUT 1 FUNCTION
OUTPUT 2 HYSTERESIS
LOWER LIMIT OF HSP1
UPPER LIMIT OF HSP1
LOWER LIMIT OF LSP1
UPPER LIMIT OF LSP1
OUTPUT2 FUNCTION
ADDRESS FOR DIG.COM.
BAUD RATE
PARITY BIT
ALARM FUNCTION
ALARM MODE
ALARM HYSTERESIS
ALARM FAILURE TRANSFER
EVENT INPUT FUNCTION
NORMAL DISPLAY FORMAT
MAX. HISTORICAL PV
MIN. HISTORICAL PV
ABNORMAL TIME
HIGH LIMIT SET POINT 1
LOW LIMIT SET POINT 1
SET POINT VALUE FOR OUTPUT 1
Limit Control
OUT1:
Selects the output 1 function. The available output
1 functions are: High Limit Control, Low Limit Control and
High/Low Limit Control. Refer to page 16 for the limit
control operation.
O1HY: Output 1 hysteresis value. The hysteresis value is
adjusted to a proper value to eliminate the relay
jitter in a noisy environment.
Set Point Range
HSP.L: Lower limit of HSP1.
Hidden if LO is selected for OUT1
HSP.H:Upper limit of HSP1
Hidden if LO is selected for OUT1
LSP.L: Lower limit of LSP1
Hidden if HI is selected for OUT1
LSP.H: Upper limit of LSP1
Hidden if HI is selected for OUT1
HSP.L and HSP.H in set up menu are used to confine the
adjustment range of HSP1. LSP.L and LSP.H are used to
confine the adjustment range of LSP1.
PV Shift
In certain applications it is desirable to shift the indicated
value from its actual value. This can be easily accom-
plished by using the PV shift function.
Cycle the unit to the SHIF parameter by using the scroll
key. The number you adjust here, either positive or nega-
tive, will be added to the actual value. The SHIF function
will alter PV.
SHIF: PV shift (offset) value
Digital Filter
In certain applications the process value is too unstable
to be read. To improve this, a programmable low pass fil-
ter incorporated in the ETR-9040 can be used. This is a
first order filter with a time constant specified by the FILT
parameter which is contained in the set up menu. The
FILT is defaulted to 0.5 seconds before shipping. Adjust
FILT to change the time constant from 0 to 60 seconds. 0
second represents no filter is applied to the input signal.
The filter is characterized by the following diagram.
Figure 5.1
Filter Characteristics
