Modbus Communication - M-system R1M-A1 Instruction Manual

MODBUS COMMUNICATION

■ COMMUNICATION PARAMETERS
PARAMETER
Data Mode
Baud Rate
Bit Length
Node Address
Floating Point Data
Interface
■ FUNCTION CODES & SUPPORTED CODES
CODE NAME
01 Read Coil Status
02 Read Input Status
03 Read Holding Registers
04 Read Input Registers
05 Force Single Coil
06 Preset Single Registers
07 Read Exception Status
08 Diagnostics
09 Program 484
10 Poll 484
11 Fetch Comm. Event Counter
12 Fetch Comm. Event Log
13 Program Controller
14 Poll Controller
15 Force Multiple Coils
16 Preset Multiple Registers
17 Report Slave ID
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
Parity
Stop Bit
X Digital output from the slave
X Status of digital inputs to the slave
X General purpose register within the slave
X Collected data from the field by the slave
X Digital output from the slave
X General purpose register within the slave
Fetch a status word and an event counter
A status word, an event counter, a message count and a field of event bytes
X Digital output from the slave
X General purpose register within the slave
Slave type / 'RUN' status
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: info@m-system.co.jp
SPECIFICATION
RTU
9600 / 19200 / 38400 (*) bps
None / Odd (*) / Even
8
1 (*) / 2
1 (*) to 15
N/A
RS-232-C / RS-485
EM-5661 Rev.6 P. 5 / 8
R1M-A1