95
Figure 119: LED-Matrix display network integration
Any device operating as an RCCMD Sender like a computer running UPSMAN software,
RCCMD clients, CS121 Web managers and other RCCMD 2 compatible products can send
text messages or environmental data values to the LED-Matrix and can add sounding alarms
for warnings that require immediate attention. Users can also use the built in Web server
interface of the LED-Matrix to relay alarms and messages without the use of an RCCMD
Sender. The user simply enters the message into the Web browser that is to be relayed
through the LED-Matrix.
For further information and description please take a look into the LED-Matrix User Manual.
6.7 MODBUS / PROFIBUS
MODBUS
Modbus is a serial communications protocol for use with its programmable logic controllers
(PLCs). It has become a de facto standard communications protocol in industry, and is now the
most commonly available means of connecting industrial electronic devices. Modbus allows for
communication between many devices connected to the same network, for example a system
that measures temperature and humidity and communicates the results to a computer.
Modbus is often used to connect a supervisory computer with a remote terminal unit (RTU) in
supervisory control and data acquisition (SCADA) systems.
The CS121-series (exclude BUDGET models) support MODBUS over IP and MODBUS over
RS232 generally. Additionally, the CS121MODBUS-series also includes an RS485 interface at
COM2, which can be connected to a 485Bus-system.
Note: MODBUS response changed: Now MODBUS will respond with "-9999"
or with "-1", if values are requested, which are not available at this UPS
or other device. This shall clearly identify that this value is "not
available".
Figure 120: CS121MODBUS Installation
PROFIBUS, LONBUS and other Field busses
PROFIBUS (Process Field Bus) is the most popular type of fieldbus with more than 14 million
nodes (2006) in use worldwide. PROFIBUS was defined in 1991/1993 as DIN 19245, moved in
1996 to EN 50170 and is since 1999 included in IEC 61158/IEC 61784 Standards.
To integrate the CS121 in a Profibus environment, GENEREX offers a Profibus gateway,
which converts the MODBUS output of the CS121 into PROFIBUS environment. The
implementation of LONBUS or any other GENEREX field bus converter takes place in similar
way.
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