Samson 5476 manual Communication

Communication

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 = 20 + 21 + … + 215

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).

Fig. 6 · Network structure

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.

66EB 5476 EN