Kistler-Morse KM SVS2000 - Manual (Page 55)

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97-1129-01 Rev. D
44 IOut Track
The current transmitter can be set to interpret the value entered for the low current
and high current operation points as gross or net weight. Transmitting current based
on gross eight is the default.
45 IOut Failsafe
If the SVS2000 detects a problem, one of three fail-safe conditions can be applied to
a current output:
— Hi
— Lo — default
— nC (no change)
Lo forces the current output to be 0 (in 0-20 mA range) or 4 mA (in 4-20 mA range)
in a fail-safe condition. Hi forces the output to be 20 mA in a fail-safe condition. nC
makes no change to the current output in a fail-safe condition (i.e., what was being
transmitted before the problem was detected will continue to be transmitted). A fail-
safe condition remains in effect until the problem has been corrected. The following
are examples of fail-safe conditions:
— ADC overrange/underrange condition
— engineering units overrange
— Communication error with a serial device
46 IOut Enable
Enables and disables the current transmitter. If you are not using the current
transmitter, disabling it increases the processing speed of the SVS2000. The factory
default for IOut Enable is Off. However, if you enter a value for one or more current
output functions (41 through 45), the SVS2000 automatically changes IOut Enable to
On.
currenT ouTpuT exaMpleS
example 1: you want an early warning via a current output to a PLC/DCS that a 20,000 lb capacity vessel is
nearly full or empty. you enter 3,000 lbs as the low current value and 17,000 lbs as the high current value, both
asgross values, for a 4-20 mA operation. When the gross weight is 3,000 lbs, 4 mA current is transmitted,
providing an early warning that the vessel is close to being empty. When the gross weight is 17,000 lbs, 20 mA is
transmitted, providing an early warning that the vessel is close to being full.
example 2: you want to monitor how much material is being added to or removed from a vessel, and transmit
a current output to a remote display. you enter -5,000 lbs as the low current value and 7,000 lbs as the high
current value, both as net values, for a 0-20 mA operation. When the net weight is -5,000 lbs (5,000 lbs has been
removed since you last tared the vessel), 0 mA current is transmitted. When the net weight is +7,000 lbs (7,000
lbs has been added since you last tared the vessel), 20 mA current is transmitted.
SeTTIng up currenT ouTpuT
Follow this procedure to set up current output:
1. If the SVS2000 is in Run Mode, press the ‘4’ Key, ‘1’ Key, and Enter Key to access the menu tree. The
display shows:
41 IOUT RAnGE