Hardy HI 1756-2WS - Manual (Page 56)

HI 1756-WS WEIGH SCALE MODULE
5-4
• For example: If the ladder logic dis-
play reads 100 pounds and a 20 pound
weight is placed on the vessel or
scale, the ladder logic display should
read 120 or some value over 100.
• If the ladder logic display reads 100
pounds and a 20 pound load is placed
on the vessel or scale and the reading
is 80 pounds, the reading is going in
the wrong direction and indicates
some problem with the system.
• If the ladder logic display is reading
improperly or shows no change there
is something wrong with the setup.
Step 2. If the ladder logic display changed weight
in the proper direction, remove the weight
and proceed to calibrate the module.
C2 Calibration
About C2
Calibration C2 calibration requires C2 load sensors. If you do not
have C2 load sensors you must perform a traditional
calibration with test weights which we call a Hard
Calibration. The Weigh Module reads the perfor-
mance characteristics of each individual load cell and
detects the quantity of load cell(s) in the system. C2
Calibration can be performed by pressing “The But-
ton” located in the front of the module, or via Allen
Bradley RS LOGIX 5000.
“THE BUTTON” C2
Calibration Step 1. Be sure that the parameters have been
setup for your weighing process. (See
Chapter 4, Setup)
Step 2. Open the front door of the module.
Step 3. Press and hold “The Button” until the
desired Scale LED turns green, and release
it when the Scale LED flashes green. (See
Fig. 5-3 & 5-4)