AW Gear Meters EMO-1005 User Manual
Page 24
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
23
Initial Kick
The PI-controller will output the value in total limit 2 (P. 21) if there is a set value and nothing is being
received from the feedback loop. This is called the initial kick and is meant to
>kick start= some fluid
regulators, which will resist an initial opening when starting from a zero flow condition. The initial
kick can be programmed from 0000 to 1023 (where 0000=omA and 1023=20mA). In units prior to
AUGUST 1987, the initial kick could be programmed only from 000 to 255.
Auto Hold
In PID mode, if the feedback signal is cut off abruptly, the software will maintain the last analog output
value. This is an advantage in an ON/OFF operation since the unit does not have to start regulating
again from zero when the signal is given to restart. An example of an ON/OFF system is a paint
spraying gun.
Manual Hold
There is an additional HOLD function for applications where ON-cycles are extremely short or where
during the flush cycle no control is desired. The HOLD signal is overriding in a sense that nothing is
able to change the Analog Output while HOLD is on. This function can be initiated with 15 V to pin
12, and pin 9 jumped to pin 15 (See Appendix J).
The EMO-1005 PI-mode is fairly uncritical. AW Company, however, recommends some prior
knowledge of Closed Loop System controlling before hooking us the PI-mode channel. The response
times are dependent upon the following things:
- Resolution of the transmitter
- Mechanical delays in the system
o
(boosters and I/P converters or the hose/pipe length between components)
- Gain factors (KFA)