EKO MS-80 Manual

EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80 - Instruction Manual Ver. 3
Pg. 44
A-4. Communication Specifications (MS-80M)
Communication data format is determined by the Modbus protocol.
Table A-5. Communications Specifications
Specification
Details
Telecommunication Standard
EIA RS-485
Topology
Multidrop (Master: 1, Slave: 100, Total: 100)
Communication protocol
MODBUS slave RTU
※
1
(Slave)
Communication speed (baud rate）
4800, 9600, 19200, 38400, 56000, 57600, 115200 bps
Data Length
8bits
Stop Bit
1bit/2bits
※
2
Parity Bit
none/odd/even
Communication Distance
Maximum 1.2km (theoretical value)
Error Detection
CRC-16
※
1: The open protocol for the serial communication which is developed by Modicon.
※
2: when there is no parity bit, stop bit will be 2 bits; for other cases, stop bit will be 1 bit.
Table A-6. Data Format
Start
Address
Function
Data
CRC
End
T1-T2-T3-T4
A silent interval
(
≧
3.5 char)
8bit
8bit
n * 8bit
16bit
T1-T2-T3-T4
A silent interval
(
≧
3.5 char)
Table A-7. Function Code
Code: decimal
Function
03
Read Holding Registers
Modbus Data (RTU)

EKO MS-80 Specifications

General

Brand	EKO
Model	MS-80
Category	Measuring Instruments
Language	English