MSI CellScale
®
System • 9750A User Guide Page 17
MEASUREMENT SYSTEMS INTERNATIONAL
Firmware Version 5-XX for 2450 Modems
SECTION 3 – SCALE OPERATION
POWER
To Turn On the Power
POWER
If the system fails
to connect in 8 seconds or
less, press the ADDRESS
key to select a different
Network, or enter the
number of a working net-
work and press ADDRESS.
If this fails check RF
network setups, or decrease
the range between the
CellScale and the 9750A.
1) Press and hold
POWER
for 1 second. The display should light and show the MSI
Logo.
2) The LCD then displays “MSI-9750A-5”, the Network currently loaded as the active
Address, and the software version number. The display will read “Searching Add
XX” while establishing communications with the master CellScale.
3) Next the RF network is contacted. If the network is functional, the display switches
to normal weight display mode. This usually takes 4-15 seconds. If the Network
is not available, the screen will continue to display the desired Network. Either
change the Scan Network with the
ADDRESS
key or turn on the proper CellScale
Master. Use of the
ADDRESS
key assumes that multiple networks have previ-
ously set up. See “Setting the Network Address” on page 12.
MULTIPLE SCALE CHANNELS
Each CellScale is capable of hosting up to 32 independent scale inputs. Since any 9750A can communicate with
any CellScale, theoretically hundreds of scales can be controlled by a single 9750A. Because of the complexi-
ties of multiple channel setups, the 9750A 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 the A/D input channel followed by a Mux sub channel value. The
standard CellScale has two A/D inputs, but can be ordered with four 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 eight
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. Math Channels allow the user to add or subtract channels from
each other or perform other mathematical manipulations of the data. All calibration data for the 32 channels is
stored in the CellScale and is independent of the 9750A. Therefore any 9750A 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 9750A 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 fi rst 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 digitally add the results of multiple scales.
When dealing with multiple channels it is recommended that you set up the display to always show either the
Channel Number or the Channel Name or both. This will help in identifying which scale you are observing.
SELECTING THE ACTIVE CHANNEL
Before standard scale functions are performed, you must select the “Active Channel”. The “Active Channel” is the
channel that commands such as Zero, Tare, Total, etc. will be performed on. On single channel display screens,
the channel shown is the active channel. On Multiple channel displays, you must highlight the desired channel.
This is done with the Cursor Keys. Once highlighted you can perform all the standard scale functions (except
Total and View Total, these only work from the single channel display). You can also switch to the single channel
display by pressing the
DISPLAY
key.
See the “DISPLAY MODE SETUP” section 7 for information on multiple and single channel weight display modes. For more information on Scan Lists and multiple
scale channels, please refer to the CellScale MSI-9000 Users Guide.
