820i Programmable HMI Indicator/Controller
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SCALES Menu
Parameter
Choices Description
Level 2 submenus
SCALE
x
Allows configuration and calibration of each scale
CONFIG
Lists available and associated A/Ds
Level 3 submenus
GRADS
10000
1–9999999
Specifies the number of full scale graduations if SPLIT=OFF. (For multi-range and multi-interval scales (SPLIT
OFF),
the GRADS value is derived from the capacity and display divisions specified for the range or interval.)
The value entered must be in the range 1–9999999 and should be consistent with legal requirements and environmen
-
tal limits on system resolution.
To calculate GRADS, use the formula: GRADS =
Capacity
/
Display Divisions
.
Display divisions are specified under the FORMAT submenu.
SPLIT
OFF
2RNG
3RNG
2INTVL
3INTVL
Specifies whether the scale is full-range (OFF), multi-range (2RNG, 3RNG), or multi-interval (2INTVL, 3INTVL). For
multi-range and multi-interval scales, see the submenu shown in
.
FORMAT
PRIMAR
SECNDR
TERTIA
ROC
For standard scales (SPLIT=OFF), see Level 4 submenu descriptions in Table 3-3.
For multi-range and multi-interval scales, see Table 3-4.
ZTRKBND
0
number
Automatically zeroes the scale when within the range specified, as long as the input is within the ZRANGE and scale
is at standstill. Specify the zero tracking band in ± display divisions. Maximum legal value varies depending on local
regulations.
NOTE:
For scales using linear calibration, do not set the zero tracking band to a value greater than
that specified for the first linearization point.
ZRANGE
1.900000
number
Selects the range within which the scale can be zeroed. The 1.900000 default value is ± 1.9% around the calibrated
zero point, for a total range of 3.8%. Indicator must be at standstill to zero the scale. Use the default value for legal-for-
trade applications.
MOTBAND
1
number
Sets the level, in display divisions, at which scale motion is detected. If motion is not detected for 1 second or more,
the standstill symbol lights. Some operations, including print, tare, and zero, require the scale to be at standstill. Maxi
-
mum legal value varies depending on local regulations.
If this parameter is set to 0 the standstill annunciator does not light; operations normally requiring standstill (zero, tare,
print) are performed regardless of scale motion. If 0 is selected, ZTRKBND must also be set to 0.
SSTIME
10
number
Specifies the length of time the scale must be out of motion, in 0.1-second intervals, before the scale is considered to
be at standstill. Values greater than 10 are not recommended.
OVRLOAD
FS+2%
FS+1D
FS+9D
FS
Determines the point at which the display blanks and an out-of-range error message is displayed. Maximum legal
value varies depending on local regulations.
WMTTHRH
1000
number
Specifies the minimum number of grads required for a weighment to be added to the recorded number of weighments.
DIGFLT1
DIGFLT2
DIGFLT3
4
8
16
32
64
128
256
1
2
Selects the digital filtering rate used to reduce the effects of mechanical vibration from the immediate area of the scale.
Choices indicate the number of A/D conversions per update that are averaged to obtain the displayed reading. A
higher number gives a more accurate display by minimizing the effect of a few noisy readings, but slows down the set
-
tling rate of the indicator.
NOTE:
When configuring non-A/D scales, set the DIGFLTx parameters to 1 to disable filtering.
for more information about digital filtering.
Table 3-2. SCALES Menu Parameters
Summary of Contents for 820i
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