AW Gear Meters EMO-1005 - Manual (Page 25)

AW-Lake Company 8809 Industrial Drive, Franksville, WI 53126  web: www.awgearmeters.com
 Tel: 262-884-9800  Fax: 262-884-9810  Email: [email protected]
REV. 1a 05/98 EMO-1005 Manual.DOC
24
EMO-1005 SOFTWARE CHANGE
A new programmable feature has been added to the EMO-1005 software.
It is a Programmable Threshold for the initial kick value used in PI and Closed Loop Mode. (See
Initial Kick, pg. 22). While most good fluid regulators are supposed to crack open at 4mA, there is
much inconsistency to be found. The earlier threshold value was fixed at 5.0 mA -this is now user
programmable. If nothing is programmed here (0000), a threshold default value of 5.0 mA (256) is
still used.
The location of the programmable value is in Total Limit #4.
The range is from 0000 to 1023 steps (Where 0000 = 0mA, and 1023 = 20mA, 51 steps = 1mA).
In the software prior to these changes, the Initial Kick (programmed in Total Limit #2) was activated
providing the following 3 system conditions were met:
1. A flow set point had been initiated.
2. Analog output was below 5.0 mA (256 steps).
3. Actual flow was zero.
Conditions 1 & 3 remain unchanged - #2 is now programmable
Example:
The Initial Kick (in Total Limit #2) is set to 615 (12 mA).
The Threshold (in Total Limit #4) is set to 358 ( 7 mA).
The current Analog output is at 5.5 mA (281 steps), but the actual flow is at zero. The valve has not
opened. The Analog Output is BELOW the Threshold and now the Initial Kick will take effect. The
Analog Output will go immediately to the Initial Kick value. In Total Limit #2 - 12 mA (615 steps).
The new version for Channel 1 software is 2.0 and for Channel 2 and over it is 1.4. This is determined
by removing the channel card, the software version is indicated on the EPROM chip. See Appendix F
for location.