Samson 5476 manual 9.4Meter bus interface, Communication

Communication

Modem time-out (t0)

When the controller connects to the GLT but without addressing a Modbus data point, the con- nection is closed after the time specified for Modem time-outhas elapsed. If the error status reg- ister has not been read during the GLT connection, the controller dials up to the GLT again after the Dialing pause to the control station (PA) has elapsed.

Number of redialing attempts (An)

The controller tries to dial up to the control system again, observing the Dialing pause to the control station, in case the GLT is busy or the function that triggered the call has not been reset by the controller. After the specified number of redialing attempts have failed, the controller di- als the alternative recipient.

Phone number of control station/alternative recipient

Enter the phone number of the control system modem/alternative recipient including the dialing code, if necessary. Short pauses between the numbers can be entered using P (= 1 second); the end of the string is to be marked by “–“. The phone number may include a maximum of 23 characters.

Example: “069, 2 sec. pause, 4009, 1 sec. pause, 0“: 0 6 9 P P 4 0 0 9 P 0 – (= 11 characters)

9.4Meter bus interface

The TROVIS 5476 Heating and District Heating Controller can communicate with up to 3 heat and water meters according to EN 1434-3. A flow rate or capacity limitation is possible on the basis of the values measured at heat meter WMZ1.

Details on the use of the different heat or water meters can be found in the technical documenta- tion TV-SK 6311.

Note!

Locate red jumper to the left with the meter bus operation using the supply voltage

Fig. 8 · View from the back of the controller

70EB 5476 EN