APPLICATION
The PD22 logger is destined for telemetering computer systems as an
intermediate element in the data exchange between the object side
and the master system.
The logger speeds up the data exchange between devices and the
master system. Moreover, it allows to increase the number of devices
connected to the system.
Two serial ports are used for communication. The first port (Port 1)
having two RS-485 interface systems, destined to communicate with
devices working in the object. The second port (Port 2) has RS-485,
RS-232C and USB interfaces, destined to communicate with the
master system through wire links.
An asynchronous MODBUS character communication protocol has
been implemented on the serial link. The logger has a real time
clock.