RT12-2222 Modbus Map

Function 1

00001 Digital Input 1

00002 Digital Input 2

Function 2

10001 Digital Input 1

10002 Digital Input 2

Function 3 (Holding Reg)

40001 AO 1

40002 AO 2

40003 Freq Input

40004 Freq-2/Input 1

40005 Freq-3/Input 2

40006 Total Count 1_Low

40007 Total Count 1_High

40008 Total Count 2_Low

40009 Total Count 2_High

40010 Time To Next Save

Function 4

30001 AI 1

30002 AI 2

30003 Battery Input

30004 Main Input

Manual Documentation Number: RT-12 series-4006m

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Peer to Peer Overview

Peer to Peer mode can be described as a Wireless Signal Replicator. The product line of RT series RTU’s can be configured as a Peer to Peer device. Two of the same type RTU’s are required to create a peer to peer system, one Master and one Slave.

The master or slave is determined by the way It is configured. The only difference between a master and slave is, the master is responsible for starting the communication process.

Both the master and slave must contain the same Radio ID and Subnet Value. Only the respective peer-to-peer systems may have the same Radio ID and RF-Network numbers. Failure to do so will cause erratic output voltages, AO’s or Digital Outputs, DO’s.

Each respective “RT” RTU device has the same number of Analog Inputs (AI’s), Analog Outputs (AO’s), Digital Inputs (DI’s) and Digital Outputs (DO’s).

The number and type of I/O will depend on the type of RTU. Each RTU, including I/O, is described in this manual.

Peer to Peer mode will allow you to transmit a 0-5 Vdc analog input, or a Digital Input, from a Master device to a Slave device and vice-versa. A master’s analog or digital inputs, become a slave’s analog or digital outputs, and vice-versa. This allows for a full-duplex, looped system.

An application example would be a remote PLC with the RT12-2222’s analog and digital I/O connected to it, this RTU will be configured as a Master. The Slave device would monitor and control a water well system and would be connected to several sensors, pump status indicators, current sensor, etc.

The PLC will view the analog and digital signals from the slave device as if the PLC was connected directly to the several sensors, pump status indicators, current sensor, etc. See “Typical Application – Well Monitor and Control, Peer-to-Peer” in this manual.

8Manual Documentation Number: RT-12 series-4006m