February 02, 2024
DXM1200-X2 Controller Instruction Manual
© Banner Engineering Corp. All rights reserved.
25
Input Registers and Outputs Registers
Modbus registers 2201 through 2584 are used to organize all inputs together.
In this format, users can sequentially read all input registers using one Modbus message. Modbus registers 4401 through
4784 organize all outputs together to allow users to sequentially write to all output registers using one Modbus message.
Input and output registers
Inputs (2201–2584)
Outputs (4401–4784)
Modbus Register Address (Decimal)
16-bit Register Value
Modbus Register Address (Decimal)
16-bit Register Value
2201–2208
Gateway Inputs 1 through 8
4401–4408
Gateway Outputs 1 through 8
2209–2216
Node 1 Inputs 1 through 8
4409–4416
Node 1 Outputs 1 through 8
2217–2224
Node 2 Inputs 1 through 8
4417–4424
Node 2 Outputs 1 through 8
...
...
...
...
2577–2584
Node 47 Inputs 1 through 8
4777–4784
Node 47 Outputs 1 through 8
Refer to your device's datasheet for a list of the active inputs and outputs. Not all inputs or outputs listed in this table may be
active for your system.
Discrete Bit-Packed Registers
Discrete bit-packed registers include the discrete status registers, discrete inputs, and discrete outputs.
Bit packing involves using a single register, or range of contiguous registers, to represent I/O values.
When networks use similar Nodes to gather data using the same I/O registers for each Node, discrete data from multiple
Nodes can be bit packed into a single register on the Gateway. The bit-packed data is arranged by I/O point starting at
Modbus register 6601. For example, Discrete IN 1 for all the Nodes in the network is stored in three contiguous 16-bit
registers.
The most efficient way to read (or write) discrete data from a Sure Cross® DX80 Gateway is by using these bit-packed
registers because users can read or write registers for all devices using one Modbus message. The following registers
contain discrete bit-packed 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.
Discrete bit-packed register addresses and bit positions
Bit-Packed Device Status Registers
Bit Position
Register Address
15
14
13
12
11
10
6601
Node 15
Node 14
Node 13
Node 12
Node 11
Node 10
Node 9
Node 8
Node 7
Node 6
Node 5
Node 4
Node 3
Node 2
Node 1
Gateway
6602
Node 31
Node 30
Node 29
Node 28
Node 27
Node 26
Node 25
Node 24
Node 23
Node 22
Node 21
Node 20
Node 19
Node 18
Node 17
Node 16
6603
Node 47
Node 46
Node 45
Node 44
Node 43
Node 42
Node 41
Node 40
Node 39
Node 38
Node 37
Node 36
Node 35
Node 34
Node 33
Node 32
Bit-Packed Discrete Input 1
Register Address
15
14
13
12
11
10
6611
Node 15
Node 14
Node 13
Node 12
Node 11
Node 10
Node 9
Node 8
Node 7
Node 6
Node 5
Node 4
Node 3
Node 2
Node 1
Gateway
6612
Node 31
Node 30
Node 29
Node 28
Node 27
Node 26
Node 25
Node 24
Node 23
Node 22
Node 21
Node 20
Node 19
Node 18
Node 17
Node 16
6613
Node 47
Node 46
Node 45
Node 44
Node 43
Node 42
Node 41
Node 40
Node 39
Node 38
Node 37
Node 36
Node 35
Node 34
Node 33
Node 32
Bit-Packed Discrete Output 1
Bit Position
Register Address
15
14
13
12
11
10
6691
Node 15
Node 14
Node 13
Node 12
Node 11
Node 10
Node 9
Node 8
Node 7
Node 6
Node 5
Node 4
Node 3
Node 2
Node 1
Gateway
6692
Node 31
Node 30
Node 29
Node 28
Node 27
Node 26
Node 25
Node 24
Node 23
Node 22
Node 21
Node 20
Node 19
Node 18
Node 17
Node 16
6693
Node 47
Node 46
Node 45
Node 44
Node 43
Node 42
Node 41
Node 40
Node 39
Node 38
Node 37
Node 36
Node 35
Node 34
Node 33
Node 32
Bit Position
Summary of Contents for DXM1200-X2
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