ECKELMANN VS 300 - Setting Parameters for LP Transducer Characteristic

Function of VS 300
22
Doku-Version 2.05 - Firmware 2.10 - 15. September 2017
4.3.1 Setting parameters for LP transducer characteristic
The VS 300 Pack Controller works with continuous pressure transducers possessing a linear characteristic. At
the present time, exclusively pressure transducers working with current output (4-20 mA) are usable.
Current hardware design of analog inputs on pressure transducers for Control Loops 1 and 2 is as
current inputs (4-20 mA)!
Care must be exercised when installing the pressure transducers. Leads must be shielded and must
not run parallel with power cables. Appropriate measures must be taken to prevent interference from
entering the pressure transducer leads.
The following parameters are used to match the controller to the pressure transducer:
Integral operation
VS 300 LED display
Display
AL 300 or CI 3000
Description
See section 7 Parameter List
an Menu Structure/Parameter
List S3 - Pressure transdu
cers parameter setting
CL1/CL for 4 mA
po 4 mA Parameter defines pressure p
0
at which transducer delivers 4 mA
output signal.
See section 7 Parameter List
an Menu Structure/Parameter
List S3 - Pressure transdu
cers parameter setting
CL1/CL for 20 mA
po 20 mA Parameter defines pressure p
0
at which transducer delivers 20 mA
output signal.
An alarm is transmitted when either of these parameters is changed:
Integral operation
VS 300 LED display
Display
AL 300 or CI 3000
Description
E203 Sens.type change Parameter for pressure transducer has been changed.
Incorrect setting of parameters can result in severe impairment of function.
4.3.2 Low-pressure control neutral zone
When using low-pressure control by step controller, no loading or unloading of compressors takes place as long
as the control error remains with a programmable neutral zone. When using low-pressure control by combined
controller, the effect of the neutral zone is as follows:
As long as the control error is within 1.5 times the neutral zone, low pressure is controlled by increasing or de
creasing compressor speed. Above or below 1.5 times the neutral zone, the compressor runs at maximum or
minimum speed to quickly achieve steady state.