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Example of a transfer to the control system:
The error status register is transferred as a word <w> in a holding register (HR) whose value is
calculated as follows: <w> = D_0 + D_1 + … + D_15 = 2
0
+ 2
1
+ … + 2
15
9 Communication
Using the serial system bus interface, the TROVIS 5476 Heating Controller can communicate
with a building control system. In combination with a suitable software for process visualization
and communication, a complete control system can be implemented.
The following communication settings are possible:
– Operation with a dial-up modem at the RS-232-C system bus interface
Basically, communication is only established automatically when errors occur. The controller
works autonomously. Nevertheless, the modem can dial up to the controller at any time to read
data from it or otherwise influence it, if necessary. We recommend to use the modem connect
-
ing cable (1400-7139).
– Operation with a four-wire bus at the RS-485 system bus interface
To establish the link between computer and bus line, the signal level needs to be converted by a
converter (SAMSON’s TROVIS 5484 Converter).
The TROVIS 5476 Controller is fitted with either a RS-485 port or a RS-232-C port depending
on the order. The optional operation between both versions or a conversion to a different port
version is not possible.
66 EB 5476 EN
Communication
Fig. 6 · Network structure