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Model 3095FB Multivariable Transmitter with Modbus Protocol
Modbus Protocol Guide
Page 21 of 79
3.0 Communications
3.1 Communication Options
The Transmitter Polling Address is used to identify the Modbus slave device to the host
device. No two transmitters on the same multidrop loop can have the same Transmitter Polling
Address.
The Turnaround Delay Time is the time in milliseconds that the 3095FB will wait to respond
after receiving a query from the host. If the Turnaround Delay Time is set to zero the 3095FB
will respond as fast as it can. With a simple polling of the PVs and Status Registers the
3095FB will respond after about 6 milliseconds. This may be too fast for some hosts. The
default Turnaround Delay Time is 50 milliseconds.
Table 3-1 Communication Options
Modbus Access
DESCRIPTION
Address
Address
Type
Attributes
Functional
Area
Data / Control
Default
0016
Holding
register
R/W, WP
Communi-
cations
Options
Transmitter Polling Address
range: 1 - 247
1
0131
Holding
register
R/W, WP
Turnaround Delay Time (ms)
range: 0 - 200 ms
50 ms
*Attributes: R/W = Read/Write, RO = Read Only, WP = Write Protected
**These registers are available at multiple Modbus addresses (see Section 2.3
in the
Modbus Protocol Guide
)