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A Appendix: Modbus Interface
WirelessHART Fieldgate SWG70
92
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.
0
65535
0
0
0
Coils
(not supported by Fieldgate)
Discrete Inputs
Input registers
Holding registers
(for Fieldgate RO image
of Input registers)
RW
RW
RO
RO
1
65536
100001
166536
300001
365536
400001
465536
Register
Reference
address
65535
65535
65535
Summary of Contents for Fieldgate SWG70
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