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Appendix C
Modbus Coils, Discrete Inputs, Input Registers & Holding Registers Address Tables
Holding Registers
Function
Modbus base 0
code
address
3 (Read Only)
0
6 & 16 (Write Only)*
1
2
3
4
26
Modbus
Value
5 digit address
(Read/Write*)
40001
Bit-0
Bit-1
Bit-2
Bit-3
Bit-4
Bit-5
Bit-6
Bit-7
Bit-8
Bit-9
Bit-10
Bit-11
Bit-12
Bit-13
Bit-14
Bit-15
40002
Bit-0
Bit -1
Bit-2
Bit-3
Bit-4
Bit-5
Bit-6
Bit-7
Bit-8
Bit-9
Bit-10
Bit-11
Bit-12
Bit-13
Bit-14
Bit-15
40003
Bit-0
Bit-1
Bit-2
Bit-3
Bit-4
Bit-5
Bit-6
Bit-7
Bit-8
Bit-9
Bit-10
Bit-11
Bit-12
Bit-13
Bit-14
Bit-15
40004
40005
Bit-0
Bit-1
Bit-2
Bit-3
Description
Mask for SIPOD 1 Open (0)/Close (1)
Mask for SIPOD 2 Open (0)/Close (1)
Mask for SIPOD 3 Open (0)/Close (1)
Mask for SIPOD 4 Open (0)/Close (1)
Mask for SIPOD 5 Open (0)/Close (1)
Mask for SIPOD 6 Open (0)/Close (1)
Mask for SIPOD 7 Open (0)/Close (1)
Mask for SIPOD 8 Open (0)/Close (1)
Mask for SIPOD 9 Open (0)/Close (1)
Mask for SIPOD 10 Open (0)/Close (1)
Mask for SIPOD 11 Open (0)/Close (1)
Mask for SIPOD 12 Open (0)/Close (1)
Mask for SIPOD 13 Open (0)/Close (1)
Mask for SIPOD 14 Open (0)/Close (1)
Mask for SIPOD 15 Open (0)/Close (1)
Mask for SIPOD 16 Open (0)/Close (1)
Mask for SIPOD 17 Open (0)/Close (1)
Mask for SIPOD 18 Open (0)/Close (1)
Mask for SIPOD 19 Open (0)/Close (1)
Mask for SIPOD 20 Open (0)/Close (1)
Mask for SIPOD 21 Open (0)/Close (1)
Mask for SIPOD 22 Open (0)/Close (1)
Mask for SIPOD 23 Open (0)/Close (1)
Mask for SIPOD 24 Open (0)/Close (1)
Mask for SIPOD 25 Open (0)/Close (1)
Mask for SIPOD 26 Open (0)/Close (1)
Mask for SIPOD 27 Open (0)/Close (1)
Mask for SIPOD 28 Open (0)/Close (1)
Mask for SIPOD 29 Open (0)/Close (1)
Mask for SIPOD 30 Open (0)/Close (1)
Mask for SIPOD 31 Open (0)/Close (1)
Mask for SIPOD 32 Open (0)/Close (1)
Mask for SIPOD 33 Open (0)/Close (1)
Mask for SIPOD 34 Open (0)/Close (1)
Mask for SIPOD 35 Open (0)/Close (1)
Mask for SIPOD 36 Open (0)/Close (1)
Mask for SIPOD 37 Open (0)/Close (1)
Mask for SIPOD 38 Open (0)/Close (1)
Mask for SIPOD 39 Open (0)/Close (1)
Mask for SIPOD 40 Open (0)/Close (1)
Mask for SIPOD 41 Open (0)/Close (1)
Mask for SIPOD 42 Open (0)/Close (1)
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Reserved
SIPOD 1 Open (0)/Close (1)
SIPOD 2 Open (0)/Close (1)
SIPOD 3 Open (0)/Close (1)
SIPOD 4 Open (0)/Close (1)
Note
Bits read from Right to Left
Bits read from Right to Left
Read Only unless corresponding
mask bits are set to 1
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