MSI-9000 CellScale
®
System • 3750CS User Guide Page 15
MEASUREMENT SYSTEMS INTERNATIONAL
Software V1-15 to 1-20
SECTION 3 – SCALE OPERATION
POWER
Turns the Weight Indicator On and Off.
To Turn On the Power
1
2
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 illuminate for 3 seconds, then turn off for
1/2 second.
2) The LCD displays “3750 CS” and the software
version 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 slave 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,
channel 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)
7= 6-3
Channel 6-3 defined as (CH1-1)+(CH1-2)+(CH1-3)+(CH1-4)
This scan list could be used with a wheel weighing system. The first 4 channels are connected through a CellScale
