MAGE1 User Guide
14
V1.5 12-1-2022
9. Modbus
9.1. Definitions and Abbreviations
CRC
Cyclic Redundancy Check, Used for error-checking in Modbus
RTU. See appendix
Modbus master
A Modbus device, which is able to access data in one or more
connected Modbus slaves
Modbus slave
A Modbus device, which is able to respond to requests from a
single Modbus master
Modbus address
Throughout this document the following notation is used to
address Modbus RTU registers:
1234 - Holding register 1234 (addressed in messages by 1233)
RTU
Remote Terminal Unit - Standard Modbus transmission mode
9.2. References
Reference 1
Modbus over Serial Line Specification & Implementation guide
v. 1.0 modbus.org 12/02/02
Reference 2
Modbus Application Protocol Specification v. 1.1 modbus.org
12/06/02
9.3. Technical data
ARKON Flowmeter Modbus RTU specification
Device type
Slave
Baud rates
9600, 14400, 19200, 38400, 57600, 115200 bits/sec.
Number of stations Recommended:
max. 31 per segment without repeaters
Device address range
1-247
Protocol
Modbus RTU (Other Modbus protocols like ASCII, Plus or
TCP/IP are not supported)
Electrical interface
RS485
Supported function code
3 read holding registers
16 write multiple registers
17 report slave ID
Broadcast
No
Maximum cable length
RS485 Specification limits
Standard Modbus over serial line v1.0)
Certified
No
Summary of Contents for MAGE1
Page 1: ......
