Introduction
Overview of Capabilities
Thermo Fisher Scientific Micro-Tech 9101/9201 Reference Manual, Rev J 1-15
Serial Communications
The communication protocol allows a remote intelligent device to
read the contents of the registers and write to some registers. During
the communication activity, the Micro-Tech always acts as a Slave,
meaning it responds to a request from a Master device on the line,
but never attempts to send messages out. One electrical interface
may be selected and accessed through one communication port.
Field Bus I/O
Profibus-DP I/O communication protocol board is typically used to
transfer I/O images between a main PLC and the remote devices
(normally remote I/O racks—rack adapters) or to transfer (read and
write blocks of data with intelligent remote devices (node adapters),
the Micro-Tech in this case. The Remote I/O is a typical
master/slave communication where the main PLC is the master or
scanner and the remote devices are slaves or adapters.
Ethernet Port
The Micro-Tech has a built-in Ethernet port. Communications
protocols Ethernet/IP and Modbus/TCP can be used. The Micro-
Tech is a slave device only, and cannot initiate messages.
This section describes technically, how the Micro-Tech performs each
particular duty.
The signal measured by the load cell(s), which represents the weight per
unit length of the belt (lbs/ft), is multiplied by the signal measured by
the speed transmitter, which represents the belt speed (ft/min). The result
of this operation is the instantaneous flow rate (lbs/ft x ft/min = lbs/min)
that is then multiplied by suitable constant to obtain the value in the
required engineering units (kg/h, ton/h, etc.). An adjustable damping
filter is provided separately for displayed rate and current outputs.
Flow-
To Next Page
Loading...
