Document #10-32813 Rev A; June 07, 2019
Page
50
of 69
Register
Bus
Segment
Zone
Class
Instance
Member
Refresh Count
--
1000
1
0
0
36
1
19
0
RTC 1 Timestamp
Use these setup keys to configure Modbus® RTU.
Key
Value
Feature Definition
ModbusRtu6 nor:\Gateway\ModbusRtu6.csv
Modbus®
RTU
This is only available if the model number is RMAP-2XXX-XXXX.
Full file name / path where the Modbus® RTU 6 field bus gateway
file lives. This file associates Modbus® RTU registers with data
points from any of the 3 remaining busses when Modbus® RTU 6 is
configured as a slave.
Setup Key: Modbus® RTU6
Key
Value
Feature Definition
ModbusRtu7 nor:\Gateway\ModbusRtu7.csv
Modbus®
RTU
This is only available if the model number is RMAP-2XXX-XXXX.
Full file name / path where the Modbus® RTU 7 field bus gateway
file lives. This file associates Modbus® RTU registers with data
points from any of the three remaining busses when Modbus® RTU
7 is configured as a slave.
Setup Key: Modbus® RTU7
Key
Values
Feature Definition
RtuFc6 0 (FALSE) = Master
uses Function
Code 16 exclus-
ively
1 (TRUE) = Master
uses Function
Code 6 for single
register writes
Modbus®
RTU Func-
tion Code
6
This is only available for model number RMAP-
2X
XX-XXXX.
This is used to enable Modbus® RTU Function Code 6 (Write Single Register) on
master channels for devices that do not implement Modbus® Function Code 16
(Write Multiple Registers). It is only necessary if the RMA PLUS does not negotiate
this requirement on its own.
This record is not a member of the default file, and therefore, the feature is disabled.
To enable the feature, you must add this record to the setup file.
Setup Key: RTU Fc6
Testing Modbus® RTU Communications
To perform test read / write operations on the data you may use the Modbus® RTU test program included on the MICRO
SD drive (sd:\Software\Modbus® RTU). 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.
