Holtgreven Truck Scale Resources - Manual (Page 24)

PT300 Users manual
Rev G, Feb 2011
Page 24 of 44
Cabled Scale Usage
Totalizing/Printing in Current Loop Mode
To use your next generation PT300 scales with the older legacy PT300 scales, the scales need to
be set to Current Loop (“C
CC C.L00P L00P L00P L00P”) mode. Change the protocol (“Proto Proto Proto Proto”) option in the mode menu.
Before you attempt to do either of these, a few terms and definitions must be understood. These
terms only apply to scales that are cabled together. Also, legacy cables (part #’s 100488,
100489, 100490) are wired differently than the next generation PT300 cables (part #’s 101029,
101032, 101035) and must be used in Current Loop communication mode.
Master Scale: If more than one scale is being used, the first scale in line is referred to as
the Master Scale. Normally these scales have continuous output, If you requested a
demand output use the print button on this scale when printing or totalizing.
Slave Scale: If more than one scale is being used, any scale that is not the master scale
is referred to as a Slave Scale.
Master
Slave Slave Slave
scale A scale B scale C scale D Printer
Example of Master/Slave designations
The master and slave designations are determined by the cable and not the scale itself. The cable
also determines if the scale transmits data on demand (when the print button is pushed) or
continuously. If continuous, the print button doesn't have to be activated to totalize or print.
Please refer to the cabling diagrams
Legacy PT300