Klinger Minimag
Operation Manual
KLINGER Denmark A/S | Nyager 12-14 | DK-2605 Brøndby | +45 43 64 66 11 | [email protected] | www.klinger.dk
Side 18
Appendix 1: MODBUS RTU Protocol Version V1.8.3
Electromagnetic Flowmeter MODBUS RTU Protocol
V1.8.3
1. Introduction
This communication protocol is used for the real-time acquisition of instantaneous flow rate, flow
velocity, flow percentage, fluid resistance, total forward and reverse flow, alarm status and
temperature or pressure. The converter parameters can also be read and written through this
protocol.
2. The protocol
2.1 Electrical Interface:
RS485 or RS232
2.2 Data Transfer Mode:
RTU mode
2.3 Data Format:
1 start bit
8 bits data, the least significant bit first
Non parity check
1 stop bit
2.4 Error Check:
C
RC checksum
2.5 MODBUS function code:
0X03: data read
0X04: parameter read 0X06:
parameter write
2.6 Flow Data Register Address
：
(0X03 function code)
