Watlow RMA PLUS RMAP-AA Series, User Manual

Page: 40 / 75

Version 1.0 PN: 2042-8198
Page 40 of 75 DN: 10-32813
In this example, additional records may be added starting at registers 2 and 1002 because both
elements are 32-bit values.
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A value of 0 will be returned for registers that are not explicitly defined in the table.
•
An exception will be returned if a request exceeds the limits of the table i.e. Register > 1001 in this
example.
•
Writing will not return an exception unless the above condition is violated.
Register Bus Segment Zone Class Instance Member Refresh Count
0 1 0 0 1 1 1 0 DEV 1 Hardware ID
1000 1 0 0 36 1 19 0 RTC 1 Timestamp
Figure 33 - ModbusTcp.csv default configuration
Perform test read / write operations on the data. A sample Modbus® TCP test program is included on
the MICRO SD drive for testing purposes (sd:\Software\Modbus TCP). In the following example, the
RMA PLUS’s Hardware ID (32-bit Integer) is returned for registers 0, 1. Registers 2 and 3 were not
specified so they return 0s.
Figure 34 - Example: Modbus TCP client
Attempting to read beyond the ends of the defined table will return an exception.