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Inputs

Outputs

Modbus Register
Address (Decimal)

Description (Inputs)

Modbus Register
Address (Decimal)

Description (Outputs)

6631-6633

Input 3 from all devices

6711–6713

Output 3 from all devices

6641-6643

Input 4 from all devices

6721–6723

Output 4 from all devices

6651-6653

Input 5 from all devices

6731–6733

Output 5 from all devices

6661-6663

Input 6 from all devices

6741–6743

Output 6 from all devices

6671-6673

Input 7 from all devices

6751–6753

Output 7 from all devices

6681-6683

Input 8 from all devices

Status registers (6601-6603) contain a bit-packed representation defining the devices that are operational in the wireless

system.
A one (1) written to the Discrete Status Register area indicates the device is active within the wireless system. A zero (0)

indicates the device is not active within the wireless network.
Input registers from all devices use Modbus registers 6611 through 6683 to organize the least significant bit into a

sequential array of registers. The first register contains the least significant bit from the input values for the Gateway through

Node 15. The second register contains the input values for Node 16 through Node 31, and the third register contains the

input values for Nodes 32 through 47.
For discrete inputs, only the least significant bit is used. For analog inputs, the least significant bit indicates if the analog

value is above or below the selected threshold value (when using the threshold parameter). For example, a least significant

bit of one (1) indicates the analog value is above the selected threshold value. A least significant bit of zero (0) indicates the

analog value is below the threshold value.
Output registers from all devices use Modbus registers 6691 through 6753 to organize the least significant bit into a

sequential array of registers. Output 8 (I/O point 16) cannot be written using the discrete format.

Analog 16-Bit Registers (Registers 6801 through 9098)

The most efficient way to read (or write) analog data from a Gateway is by using these 16-bit analog registers. Most

networks consist of similar Nodes reporting data using the same I/O registers for each Node. For this reason, the analog

data is arranged by I/O point using Modbus registers 6801 through 9098. For example, Input 1 for Gateway and all Nodes is

stored in the first 48 contiguous blocks of 16-bit analog registers, beginning with register 6801.
In this format, users can read a 16-bit holding register for all devices or write to a register for all devices using one Modbus

message. Using these registers is the most efficient way to read all status registers, read all analog inputs, or write all

analog outputs.
The following registers contain analog I/O values for the Gateway and all Nodes. Values are stored first for the Gateway,

then for each Node in order of Node address.

Inputs

Outputs

Modbus Register
Address (Decimal)

Description (Inputs)

Modbus Register
Address (Decimal)

Description (Outputs)

6801

Input 1 for Gateway

8001