PIR-130-AC/DC User Manual
Ver. 1.4.0, 2020/07/28
75/93
3.
Modbus RTU Protocol
The Modbus protocol was originally developed for Modicon controllers by Modicon Inc.
Detailed information related to the Modbus RTU protocol can be found at:
http://www2.schneider-electric.com/sites/corporate/en/products-services/automatio
n-control/automation-control.page.
You can also visit
http://www.modbus.org
for
more valuable information.
The PIR-130 module supports the Modbus RTU protocol, with communication Baud
Rates ranging from 1200 bps to 115200 bps. The parity, data bits and stop bits are
fixed as no parity, 8 data bits and 1 stop bit. The following Modbus functions are
supported.
Function Code
Description
Section
0x01
Reads the Coils
3.1
0x02
Reads the Discrete Inputs
3.2
0x03
Reads Multiple Registers
3.3
0x04
Reads Multiple Input Registers
3.4
0x05
Writes a Single Coil
3.5
0x06
Writes a Single Register
3.6
0x0F
Writes Multiple Coils
3.7
0x10
Writes Multiple Registers
3.8
0x46
Reads/writes the Module Settings
3.9
Error Response
If the function specified in the message is not supported, then the module responds as
below. Note that the address mapping for the Modbus protocol is Base 0.
Byte
Description
Length
(in Bytes)
Value
00
Address
1
1 to 247
01
Function Code
1
Function Code + 0x80
02
Exception Code
1
01
Note:
If a CRC mismatch occurs, the module will not respond.
Содержание PIR-130-AC
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Страница 11: ...PIR 130 AC DC User Manual Ver 1 4 0 2020 07 28 11 93 1 4 Wiring Connections PIR 130 AC PIR 130 DC ...
Страница 15: ...PIR 130 AC DC User Manual Ver 1 4 0 2020 07 28 15 93 1 7 Hardware Overview Front Rear ...
Страница 37: ...PIR 130 AC DC User Manual Ver 1 4 0 2020 07 28 37 93 Related Commands Section 2 4 AA6 ...