R1M-D1
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: [email protected]
EM-5659 Rev.6 P. 5 / 8
MODBUS COMMUNICATION
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COMMUNICATION PARAMETERS
PARAMETER
SPECIFICATION
Data Mode
RTU
Baud Rate
9600 / 19200 / 38400 (*) bps
Parity
None / Odd (*) / Even
Bit Length
8
Stop Bit
1 (*) / 2
Node Address
1 (*) to 15
Floating Point Data
N/A
Interface
RS-232-C / RS-485
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FUNCTION CODES & SUPPORTED CODES
CODE
NAME
01
Read Coil Status
X
Digital output from the slave
02
Read Input Status
X
Status of digital inputs to the slave
03
Read Holding Registers
X
General purpose register within the slave
04
Read Input Registers
X
Collected data from the field by the slave
05
Force Single Coil
X
Digital output from the slave
06
Preset Single Registers
X
General purpose register within the slave
07
Read Exception Status
08
Diagnostics
09
Program 484
10
Poll 484
11
Fetch Comm. Event Counter
Fetch a status word and an event counter
12
Fetch Comm. Event Log
A status word, an event counter, a message count and a field of event bytes
13
Program Controller
14
Poll Controller
15
Force Multiple Coils
X
Digital output from the slave
16
Preset Multiple Registers
X
General purpose register within the slave
17
Report Slave ID
Slave type / ‘RUN’ status
18
Program 884/M84
19
Reset Comm. Link
20
Read General Reference
21
Write General Reference
22
Mask Write 4X Register
23
Read/Write 4X Register
24
Read FIFO Queue