Operating instructions

A Appendix: Modbus Interface WirelessHART Fieldgate SWG70

92 Endress+Hauser

Fig. A-1: Mapping of Modbus registers Fieldgate SWG70

Refresh time Fieldgate SWG70 refreshes Modbus discrete inputs and input registers once every macrocycle. The

length of the macrocycle depends on the number of WirelessHART devices in the network, the

response time of the devices and the number of parameters they transmit.

In general, shorter refresh times can be attained by restricting the traffic over the network to

essential parameters only.

65535

Coils

(not supported by Fieldgate)

Discrete Inputs

Input registers

Holding registers

(for Fieldgate RO image

of Input registers)

65536

100001

166536

300001

365536

400001

465536

Reference

address

65535