AutomationDirect Stride SIO-MB04RTDS Manuel de l'utilisateur - Page 2

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GENERAL DESCRIPTION
Modbus data is mapped in tables and assigned an address. Data can be of two types:
• REGISTER, 2 bytes (word of 16 bits) that can be associated to an analog input or output, a variable, a setpoint, etc.
• COIL, 1 bit that can be associated to a digital input or output, or to a logic state.
A register could contain the image (mirror) of a group of coils; for example, the system flags of the device could be read or written
as individual bits addressing the coil related to each or can be read or written as a word addressing the register. Modbus registers and
coils are divided into the following groups of addresses:
• 0xxxx and 1xxxx = Coils (bit)
• 3xxxx and 4xxxx = Registers (word)
When reading functions are performed, use the tables indicated below to address the registers. These registers may be addressed by a
Modbus TCP/IP server or by the integrated web server.

REGISTER ADDRESSES

Register
40002
40003
40004
40005
40007
40011
40013
40031
Input Type, Channel 0
40032
Input Type, Channel 1
40033
Input Type, Channel 2
40034
Input Type, Channel 3
40041
Analog Input (0) - Ch0
40042
Analog Input (1) - Ch1
40043
Analog Input (2) - Ch2
40044
Analog Input (3) - Ch3
40050
41241
Offset Channel 0
41242
Offset Channel 1
41243
Offset Channel 2
41244
Offset Channel 3

SUPPORTED MODBUS FUNCTION CODES

Function
01
02
03
Read Holding Registers (4xxxx)
04
Read Inputs Registers (3xxxx)
05
06
15 (0x0F)
16 (0x10)
NOTES:
• Registers and coils marked as RO in the column 'Access' are Read Only registers.
• Registers and coils marked as R/W in the column 'Access' are Read and Write registers.
• The group of 0xxxx addresses mirrors the group of 1xxxx addresses; the group of 3xxxx addresses mirrors the 4xxxx addresses.
Therefore the first register could be addressed either as 30002 (with function 04) or 40002 ( with function 03).
• A maximum of 128 coils can be read through Modbus function codes 01 and 02 (see "Supported modbus functions codes").
• A maximum of 64 registers can be read through Modbus function codes 03 and 04 (see "Supported modbus functions codes").
• A maximum of 64 registers can be written by Modbus function code 16 (see "Supported modbus functions codes").
• A maximum of 64 coils can be written by Modbus function code 15 (see "Supported modbus functions codes").
SIO-MB04RTDS User Guide, 1st Edition
Description
Access
Firmware [0]
Firmware [1]
-Reserved-
-Reserved-
Node ID
System Flags
Watchdog timer
Break Status
Description
Read Coil Status (0xxxx)
Read Inputs Status (1xxxx)
Force Single Coil
Preset Single Register
Force Multiple Coils
Preset Multiple Registers
Coil (Hex) Coil (Dec)
RO
0x00A1
00161
RO
0x00A2
00162
RO
0x00A3
00163
RO
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RO
RO
RO
RO
RO
R/W
R/W
R/W
R/W
Stride Field I/O
COIL ADDRESSES
Description
Watchdog Enable
Watchdog Event
Power Up Event
Access
R/W
R/W
R/W
1