P64

Select P64 to configure Digital Communications Client/Host Transmission

Client/Host Transmission is available in all models

nonE

Master comms disabled (factory default)

. SP

The host working setpoint is retransmitted. Typically it would be sent to address 26 decimal in 800 clientunits. This is the remote setpoint. A local trim can be added to the remote setpoint to compensate for desired temperature variations in a particular zone.

. Pv

The measured value (PV) in the host is retransmitted. This might be used, for example, to log a temperature to a chart recorder.

. oP

The Output Power from the host control loop is transmitted. This may be used, for example, to drive a phase angle fired thyristor power controller.

P65

Select P65 to configure Digital Communications Retransmission Address

This variable selects the destination Modbus register address for the broadcast. For example, to retransmit the host working setpoint to a group of 800 clients, you should select a Comms Retransmission Address of 26. This is the address of the remote setpoint in these client units.

Be very careful when selecting an address to broadcast to make sure that the receiving unit is capable of accepting large numbers of writes to the address you are sending to. Many low cost units, including the 800 range, have a limited number of writes permitted to their non-volatile memory - typically 100,000 - and can easily be damaged by a broadcast value sent too often. This typically becomes a problem when writing to setpoints when ramps are used. Use the Remote Setpoint at address 26 for 800 range clients, and check with your equipment supplier if in doubt.

Retransmission Address is available in all models