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Table 8:Discrete bit-packed registers for inputs and outputs (Continued) (Sheet 2 of 2)
Inputs
Modbus Register
Address (Decimal)
6651–6653
Input 5 from all devices
6661–6663
Input 6 from all devices
6671–6673
Input 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. Each bit indi-
cates Node in Sync (1) or Node Not in Sync (0).
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 configured in the User Configuration Software). 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.
3.4.1.3. 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.
Table 9:Analog input and output registers
Inputs
Modbus Register
Address (Decimal)
6801
Input 1 for Gateway
6802
Input 1 for Node 1
6803
Input 1 for Node 2
...
...
6951
Input 2 for Gateway
6952
Input 2 for Node 1
6953
Input 2 for Node 2
...
...
7101
Input 3 for Gateway
7102
Input 3 for Node 1
7103
Input 3 for Node 2
...
...
7851
Input 8 (Status Register) for Gateway
7852
Input 8 (Status Register) for Node 1
7853
Input 8 (Status Register) for Node 2
...
...
For example, 6801 contains the input 1 value for the Gateway, 6802 contains the input 1 value for Node 1, and 6848 contains the input 1 value
for Node 47.
Description (Inputs)
6731–6733
6741–6743
6751–6753
Description (Inputs)
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Outputs
Modbus Register
Address (Decimal)
Output 5 from all devices
Output 6 from all devices
Output 7 from all devices
Outputs
Modbus Register
Address (Decimal)
8001
Output 1 for Gateway
8002
Output 1 for Node 1
8003
Output 1 for Node 2
...
...
8151
Output 2 for Gateway
8152
Output 2 for Node 1
8153
Output 2 for Node 2
...
...
8301
Output 3 for Gateway
8302
Output 3 for Node 1
8303
Output 3 for Node 2
...
...
9051
Output 8 for Gateway
9052
Output 8 for Node 1
9053
Output 8 for Node 2
...
...
ISM R
ADIO
Description (Outputs)
Description (Outputs)
B
(ID 1)
OARD
19
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