MSI 3750CS-5 User Manual Download Page 17

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CellScale

System • 3750CS-5 User Guide Page 17

MEASUREMENT SYSTEMS INTERNATIONAL

Software V2-21 or greater, 2nd Generation Modem

SECTION 3 – SCALE OPERATION

POWER

Turns the Weight Indicator On and Off.
To Turn On the Power

If the system fails to connect in 10 seconds or less, push the
MODEM key to send a “Talk-to-me” message. If this fails check RF
network setups, or decrease the range between the CellScale and
the 3750CS..

1) Push POWER. The system performs a display check:

All segments and the Set Point / Total LED’s illumi-

nate for 3 seconds, then turn off for 1/2 second.

2) The LCD displays “3750 CS” and the software ver-

sion number.

3) Next the RF network is contacted. If the network is

functional, the display reads “WAIT” then displays

the current weight. This usually takes 4-6 seconds.

MULTIPLE SCALE CHANNELS

Each CellScale is capable of hosting up to 32 independent scale inputs. Since any 3750CS can communicate with

any CellScale, theoretically hundreds of scales can be controlled by a single 3750CS.
Because of the complexities of multiple channel setups, the 3750CS is designed to access channels that have been

previously setup in the CellScale through its terminal interface or virtual meter interface.
Channels in the CellScale are organized by A/D input channel followed by Mux sub channel value. The standard

CellScale has 2 A/D inputs, but can be ordered with 4 A/D inputs with the addition of a second A/D Converter

module. Each A/D channel can be further divided by the use of external multiplexers into 8 additional inputs per

channel, providing a total of up to 32 independent scale inputs. The channels are designated like this:

Channel (A/D 1-4) >

1-1

< Sub channel (mux 1-8)

The channel will vary from 1-4 and the sub channel from 1-8. In addition the CellScale provides channel 5 for

remote CellScales, and channel 6 for math channels which allow the user to add or subtract channels from each

other or perform other math manipulations of the data. All calibration data for the 32 channels is stored in the

CellScale and is independent of the 3750CS. Therefore any 3750CS can receive calibrated data from any CellScale

provided the RF network is set up properly.
It should be noted that sub channels are useful even when the multiplexer option is not used. For example, chan-

nel 1-1 could be calibrated as a 1000 x 0.5 kg scale, and channel 1-2 as a 2000 x 1 kg scale, making a dual range

platform (of course this assumes the platform is capable of handling 2000 kg). This will work as long as the main

channel remains constant. So, in theory, 1 platform could be calibrated as 8 independent scales. This works because

the CellScale does not know or care if a Multiplexer is actually present. It treats the input as a separate scale.
The 3750CS is unable to read the channels directly. It reads multiple channels by using the Scan list index. The

“Scan list” is stored in the CellScale, with up to 32 channels present in the list. The ﬁrst number in the scan list

is called the Scan List Index number. The CellScale can have up to 32 Scan List indices. A scan list can include

“Math Channels” which provide a means to add digitally the results of multiple scales. For example a scan list

could look like this:

1= 1-1

2= 1-2

3= 1-3

4= 1-4

5= 6-1

Channel 6-1 defined as (CH1-1)+(CH1-2)

6= 6-2

Channel 6-2 defined as (CH1-3)+(CH1-4)